DOCSLIB.ORG

Exploring the Diversity in Hydrogen-Deficient

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Exploring the Diversity in Hydrogen-Deficient Technische Universit¨at M¨unchen Max-Planck-Institut f¨ur Astrophysik Exploring the Diversity in Hydrogen-Deficient Supernovae Stefan Taubenberger Vollst¨andiger Abdruck der von der Fakult¨at f¨ur Physik der Technischen Uni- versit¨at M¨unchen zur Erlangung des akademischen Grades eines Doktors der Naturwissenschaften (Dr. rer. nat.) genehmigten Dissertation. Vorsitzender: Univ.-Prof. Dr. L. Oberauer Pr¨ufer der Dissertation: 1. Hon.-Prof. Dr. W. Hillebrandt 2. Univ.-Prof. Dr. R. Kr¨ucken Die Dissertation wurde am 22. 2. 2008 bei der Technischen Universit¨at M¨unchen eingereicht und durch die Fakult¨at f¨ur Physik am 11. 4. 2008 angenommen. Contents 1 Introduction 9 1.1 Historical overview and SN classification ............. 10 1.2 Thermonuclear supernovae ..................... 16 1.2.1 Explosion mechanisms ................... 16 1.2.2 Observational facts ..................... 20 1.2.3 SNe Ia as cosmological tools ................ 21 1.2.4 Delay times ......................... 25 1.2.5 Own work .......................... 26 1.3 Stripped-envelope core-collapse supernovae ............ 27 1.3.1 Explosion mechanisms ................... 28 1.3.2 Observational facts ..................... 30 1.3.3 The SN-GRB connection .................. 31 1.3.4 Asphericity of the ejecta .................. 33 1.3.5 Own work .......................... 34 2 Data acquisition and processing 37 2.1 Data acquisition ........................... 37 2.2 Telescopes and instrumentation .................. 38 2.3 Data reduction ............................ 42 2.3.1 Pre-reduction ........................ 43 2.3.2 Photometry ......................... 44 2.3.3 Spectroscopy ......................... 52 Thermonuclear Supernovae 55 3 The European Supernova Collaboration 57 3.1 The concept ............................. 57 iii iv CONTENTS 3.2 SNe studied by the ESC ...................... 58 3.3 Generic results ............................ 62 4 The underluminous Type Ia Supernova 2005bl 71 4.1 Introduction ............................. 71 4.2 Observations ............................. 73 4.3 Distance, extinction and host-galaxy properties .......... 77 4.4 Photometric evolution ........................ 86 4.4.1 Filtered light curves ..................... 86 4.4.2 Bolometric light curve .................... 87 4.4.3 Colour evolution ....................... 89 4.5 Spectroscopic evolution ....................... 89 4.5.1 Spectra of SN 2005bl .................... 89 4.5.2 Comparison with other underluminous SNe Ia ...... 92 4.5.3 Ejecta velocities ....................... 95 4.6 Spectral modelling .......................... 97 4.6.1 Concept of the radiative transfer code ........... 97 4.6.2 Model parameters & chemical composition ........ 98 4.7 Discussion .............................. 100 4.7.1 Photometric behaviour of underluminous SNe Ia ..... 101 4.7.2 The rise time of underluminous SNe Ia .......... 107 4.7.3 Spectroscopic parameters .................. 110 4.7.4 Element abundances from synthetic spectra ....... 114 4.8 Conclusions .............................. 119 Stripped-envelope core-collapse Supernovae 121 5 SN 2004aw: Diversity in Type Ic Supernovae 123 5.1 Introduction ............................. 123 5.2 Observations ............................. 126 5.2.1 Photometric observations .................. 126 5.2.2 Spectroscopic observations ................. 128 5.3 Distance and Extinction ...................... 128 5.4 Light curves ............................. 133 5.4.1 Optical light curves ..................... 133 5.4.2 Near-IR light curves ..................... 136 5.4.3 Colour evolution ....................... 138 5.4.4 Absolute magnitudes, bolometric light curve ....... 139 5.5 Spectral evolution .......................... 141 CONTENTS v 5.5.1 Sequence of optical spectra ................. 141 5.5.2 Comparison to optical spectra of other SNe Ic ...... 143 5.5.3 Near-IR spectroscopy: Identification of He i lines? .... 148 5.5.4 Ejecta velocities ....................... 151 5.6 Discussion .............................. 152 5.6.1 Search for an associated GRB ............... 156 5.6.2 Mass of the ejecta ...................... 157 5.7 Summary and Outlook ....................... 159 6 Nebular line profiles of Type Ib/c SNe 161 6.1 Introduction ............................. 162 6.2 The sample of SN Ibc spectra ................... 163 6.2.1 The full sample ....................... 164 6.2.2 Previously unpublished spectra .............. 164 6.3 Fitting the oxygen line ....................... 169 6.3.1 Expected line profiles .................... 169 6.3.2 [O I] λ6300 and [O I] λ6364 ................. 173 6.3.3 The fitting procedure .................... 176 6.4 Blueshifted line centroids at early phases ............. 177 6.5 Statistical analysis, inferred ejecta geometries ........... 184 6.5.1 Taxonomy .......................... 184 6.5.2 Statistical evaluation .................... 187 6.6 Discussion of individual objects .................. 190 6.6.1 SNe 1994I, 1996N and 1996aq: blueshifted blobs? .... 190 6.6.2 SNe 1990B, 1993J and 2006ld: clumpy ejecta ....... 192 6.6.3 SNe 1998bw and 2002ap: narrow cores? .......... 192 6.6.4 SNe 2003jd and 2006T: classical double peaks ...... 193 6.6.5 SNe 2000ew and 2004gt: jet-events or ‘fake’ double peaks?194 6.6.6 SNe 1991N and 1997X: spherical explosions? ....... 195 6.7 The profile of Mg i] λ4571 ...................... 196 6.8 Conclusions .............................. 199 6.9 Appendix: fit parameters ...................... 201 7 Summary and outlook 207 Bibliography 213 List of Tables 1.1 Historical Galactic supernovae during the past millennium. ... 10 4.1 Properties of SN 2005bl and its host galaxy. ........... 75 4.2 Bessell UBVRI and Sloan griz magnitudes of the local sequence stars in the field of SN 2005bl. ................... 76 4.3 S- and K-corrected Bessell magnitudes of SN 2005bl. ...... 78 4.4 Amount of S- and K-correction contained in the magnitudes reported in Table 4.3. ........................ 80 4.5 Sloan photometry of SN 2005bl. No S- and K-correction has been applied. ............................. 81 4.6 Journal of spectroscopic observations of SN 2005bl. ....... 82 4.7 Physical parameters of SN 2005bl inferred from synthetic spec- tra. The mass fractions of selected elements are recorded, and solar photospheric abundances are shown for comparison. .... 98 4.8 Comparison sample of SNe Ia with ∆m15(B)true > 1.5 – dis- tances and colour excesses. ..................... 103 4.9 Comparison sample of SNe Ia with ∆m15(B)true > 1.5 – intrinsic properties. ............................... 104 5.1 Magnitudes of local sequence stars in the field of SN 2004aw. 127 5.2 IR photometry of SN 2004aw. ................... 128 5.3 Optical photometry of SN 2004aw. ................. 129 5.4 Spectroscopic observations of SN 2004aw. ............. 131 5.5 Main photometric parameters of SN 2004aw. ........... 135 5.6 Comparison of absolute magnitudes, kinetic energy, ejecta mass and Ni mass of SNe Ic. ........................ 158 6.1 List of SNe Ib/c studied in this paper. ............... 165 6.2 Instrumental details of previously unpublished spectra. ..... 168 1 2 LIST OF TABLES 6.3 Selected ejecta geometries and corresponding line profiles. .... 186 6.4 SN taxonomy in terms of [O i] line profiles. ............ 187 6.5 Parameters of the best one-component (cols. 4–6) and two- component (cols. 7–13) fits of [O i] λ6300. ............. 202 6.6 Parameters of the best three-component fits of the [O i] λ6300 line for selected spectra with complex line profiles. ........ 205 List of Figures 1.1 Classical distinction into Type Ia, Ib, Ic and Type II SNe on the basis of representative spectra. ................... 12 1.2 Up-to-date SN classification scheme, with a number of recently established subclasses added. .................... 13 1.3 Formation of P-Cygni line profiles in expanding atmospheres. Absoption and emission regions are indicated in the figure. ... 14 1.4 Schematic light curves of different SN classes. ........... 16 1.5 Snapshots of a full 3D multi-spot-ignited simulation of a SN- Ia deflagration. Rayleigh-Taylor instabilities (‘mushrooms’) are evident. ................................ 18 1.6 Peak absolute magnitudes of SNe Ia as a function of their LC decline rate in the B band, ∆m15(B). ............... 22 1.7 Top panel: SN-Ia Hubble diagram. The best-fitting flat ΛCDM cosmology is overplotted on the observed data. Bottom panel: Confidence contours for a parametrisation of the equation-of-state parameter as w = w0 + waz/(1 + z), obtained from high-z SN data using different priors. ............. 24 1.8 CC-models showing strong convection with dominant l = 1 mode in the neutrino-heated region below the shock. ....... 29 1.9 Ejecta distribution in Maeda et al.’s parametrised jet-model for GRB-SNe. The resulting [O i] λλ6300, 6364 profiles for different viewing angles are also shown. ................... 34 2.1 PSF-fitting SN photometry with snoopy. From left to right the original image, the fit of the background, the fitted SN PSF and the residuals after SN subtraction are displayed. ......... 46 2.2 Template-subtraction technique, shown for an R-band image of SN 2005bl. .............................. 47 3 4 LIST OF FIGURES 2.3 Instrumental BVRI / ri passbands used for the observations of SNe 2004aw and 2005bl. ....................... 50 2.4 Two-dimensional spectroscopic image of SN 2004aw taken on 2004 April 14 with CAFOS. Overplotted is the extracted, back- ground-subtracted 1D spectrum which results from apall. ... 52 3.1 High-velocity features in
Load more

Recommended publications
  • The Very Young Resolved Stellar Populations Around Stripped-Envelope Supernovae
    MNRAS 000,1– ?? (2016) Preprint 22 December 2017 Compiled using MNRAS LATEX style file v3.0 The very young resolved stellar populations around stripped-envelope supernovae Justyn R. Maund?y Department of Physics and Astronomy, University of Sheffield, Hicks Building, Hounsfield Road, Sheffield S3 7RH, U.K. Accepted XXX. Received YYY; in original form ZZZ ABSTRACT The massive star origins for Type IIP supernovae (SNe) have been established through direct detection of their red supergiants progenitors in pre-explosion observations; however, there has been limited success in the detection of the progenitors of H-deficient SNe. The final fate of more massive stars, capable of undergoing a Wolf-Rayet phase, and the origins of Type Ibc SNe remains debated, including the relative importance of single massive star progeni- tors or lower mass stars stripped in binaries. We present an analysis of the ages and spatial distributions of massive stars around the sites of 23 stripped-envelope SNe, as observed with the Hubble Space Telescope, to probe the possible origins of the progenitors of these events. Using a Bayesian stellar populations analysis scheme, we find characteristic ages for the pop- ulations observed within 150 pc of the target Type IIb, Ib and Ic SNe to be log¹tº = 7:20, 7:05 and 6:57, respectively. The Type Ic SNe in the sample are nearly all observed within 100 pc of young, dense stellar populations. The environment around SN 2002ap is an important ex- ception both in terms of age and spatial properties. These findings may support the hypothesis that stars with Minit > 30M produce a relatively large proportion of Type Ibc SNe, and that these SN subtypes arise from progressively more massive progenitors.
    [Show full text]
  • Gone Without a Bang: an Archival HST Survey for Disappearing Massive Stars
    MNRAS 453, 2885–2900 (2015) doi:10.1093/mnras/stv1809 Gone without a bang: an archival HST survey for disappearing massive stars Thomas M. Reynolds,1,2‹ Morgan Fraser1 and Gerard Gilmore1 1Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK 2Tuorla Observatory, Department of Physics and Astronomy, University of Turku, Vais¨ al¨ antie¨ 20, FI-21500 Piikkio,¨ Finland Downloaded from Accepted 2015 August 4. Received 2015 July 16; in original form 2015 May 27 ABSTRACT It has been argued that a substantial fraction of massive stars may end their lives without http://mnras.oxfordjournals.org/ an optically bright supernova (SN), but rather collapse to form a black hole. Such an event would not be detected by current SN surveys, which are focused on finding bright transients. Kochanek et al. proposed a novel survey for such events, using repeated observations of nearby galaxies to search for the disappearance of a massive star. We present such a survey, using the first systematic analysis of archival Hubble Space Telescope images of nearby galaxies with the aim of identifying evolved massive stars which have disappeared, without an accompanying optically bright SN. We consider a sample of 15 galaxies, with at least three epochs of Hubble Space Telescope imaging taken between 1994 and 2013. Within this data, we find one candidate at CERN - European Organization for Nuclear Research on September 15, 2016 which is consistent with a 25–30 M yellow supergiant which has undergone an optically dark core-collapse. Key words: stars: evolution – stars: massive – supernovae: general. plosion, and Type IIL (Linear) SNe which have a steady decline 1 INTRODUCTION in luminosity from peak.
    [Show full text]
  • Experiencing Hubble
    PRESCOTT ASTRONOMY CLUB PRESENTS EXPERIENCING HUBBLE John Carter August 7, 2019 GET OUT LOOK UP • When Galaxies Collide https://www.youtube.com/watch?v=HP3x7TgvgR8 • How Hubble Images Get Color https://www.youtube.com/watch? time_continue=3&v=WSG0MnmUsEY Experiencing Hubble Sagittarius Star Cloud 1. 12,000 stars 2. ½ percent of full Moon area. 3. Not one star in the image can be seen by the naked eye. 4. Color of star reflects its surface temperature. Eagle Nebula. M 16 1. Messier 16 is a conspicuous region of active star formation, appearing in the constellation Serpens Cauda. This giant cloud of interstellar gas and dust is commonly known as the Eagle Nebula, and has already created a cluster of young stars. The nebula is also referred to the Star Queen Nebula and as IC 4703; the cluster is NGC 6611. With an overall visual magnitude of 6.4, and an apparent diameter of 7', the Eagle Nebula's star cluster is best seen with low power telescopes. The brightest star in the cluster has an apparent magnitude of +8.24, easily visible with good binoculars. A 4" scope reveals about 20 stars in an uneven background of fainter stars and nebulosity; three nebulous concentrations can be glimpsed under good conditions. Under very good conditions, suggestions of dark obscuring matter can be seen to the north of the cluster. In an 8" telescope at low power, M 16 is an impressive object. The nebula extends much farther out, to a diameter of over 30'. It is filled with dark regions and globules, including a peculiar dark column and a luminous rim around the cluster.
    [Show full text]
  • Fundamental Properties of Core-Collapse Supernova and GRB Progenitors: Predicting the Look of Massive Stars Before Death
    A&A 558, A131 (2013) Astronomy DOI: 10.1051/0004-6361/201321906 & c ESO 2013 Astrophysics Fundamental properties of core-collapse supernova and GRB progenitors: predicting the look of massive stars before death Jose H. Groh1, Georges Meynet1, Cyril Georgy2, and Sylvia Ekström1 1 Geneva Observatory, Geneva University, Chemin des Maillettes 51, 1290 Sauverny, Switzerland e-mail: [email protected] 2 Astrophysics group, EPSAM, Keele University, Lennard-Jones Labs, ST5 5BG Keele, UK Received 16 May 2013 / Accepted 20 August 2013 ABSTRACT We investigate the fundamental properties of core-collapse supernova (SN) progenitors from single stars at solar metallicity. For this purpose, we combine Geneva stellar evolutionary models with initial masses of Mini = 20−120 M with atmospheric and wind models using the radiative transfer code CMFGEN. We provide synthetic photometry and high-resolution spectra of hot stars at the pre-SN stage. For models with Mini = 9−20 M, we supplement our analysis using publicly available MARCS model atmospheres of RSGs to estimate their synthetic photometry. We employ well-established observational criteria of spectroscopic classification and find that, depending on their initial mass and rotation, massive stars end their lives as red supergiants (RSG), yellow hypergiants (YHG), luminous blue variables (LBV), and Wolf-Rayet (WR) stars of the WN and WO spectral types. For rotating models, we obtained the + following types of SN progenitors: WO1–3 (Mini ≥ 32 M), WN10–11 (25 < Mini < 32 M), LBV (20 ≤ Mini ≤ 25 M), G1 Ia (18 < Mini < 20 M), and RSGs (9 ≤ Mini ≤ 18 M). For non-rotating models, we found spectral types WO1–3 (Mini > 40 M), WN7–8 (25 < Mini ≤ 40 M), WN11h/LBV (20 < Mini ≤ 25 M), and RSGs (9 ≤ Mini ≤ 20 M).
    [Show full text]
  • Monthly Newsletter of the Durban Centre - March 2018
    Page 1 Monthly Newsletter of the Durban Centre - March 2018 Page 2 Table of Contents Chairman’s Chatter …...…………………….……….………..….…… 3 Andrew Gray …………………………………………...………………. 5 The Hyades Star Cluster …...………………………….…….……….. 6 At the Eye Piece …………………………………………….….…….... 9 The Cover Image - Antennae Nebula …….……………………….. 11 Galaxy - Part 2 ….………………………………..………………….... 13 Self-Taught Astronomer …………………………………..………… 21 The Month Ahead …..…………………...….…….……………..…… 24 Minutes of the Previous Meeting …………………………….……. 25 Public Viewing Roster …………………………….……….…..……. 26 Pre-loved Telescope Equipment …………………………...……… 28 ASSA Symposium 2018 ………………………...……….…......…… 29 Member Submissions Disclaimer: The views expressed in ‘nDaba are solely those of the writer and are not necessarily the views of the Durban Centre, nor the Editor. All images and content is the work of the respective copyright owner Page 3 Chairman’s Chatter By Mike Hadlow Dear Members, The third month of the year is upon us and already the viewing conditions have been more favourable over the last few nights. Let’s hope it continues and we have clear skies and good viewing for the next five or six months. Our February meeting was well attended, with our main speaker being Dr Matt Hilton from the Astrophysics and Cosmology Research Unit at UKZN who gave us an excellent presentation on gravity waves. We really have to be thankful to Dr Hilton from ACRU UKZN for giving us his time to give us presentations and hope that we can maintain our relationship with ACRU and that we can draw other speakers from his colleagues and other research students! Thanks must also go to Debbie Abel and Piet Strauss for their monthly presentations on NASA and the sky for the following month, respectively.
    [Show full text]
  • A High Angular-Resolution Search for the Progenitor of the Type Ic Supernova SN 2004Gt
    A high angular-resolution search for the progenitor of the type Ic supernova SN 2004gt Avishay Gal-Yam1 D. B. Fox, S. R. Kulkarni, K. Matthews, D. C. Leonard2, D. J. Sand, D.-S. Moon, S. B. Cenko, & A. M. Soderberg Division of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, CA 91125, USA [email protected] Received ; accepted 1Hubble Fellow. 2NSF Astronomy and Astrophysics Postdoctoral Fellow. –2– ABSTRACT We report the results of a high-spatial-resolution search for the progenitor of type Ic supernova SN 2004gt, using the newly commissioned Keck laser-guide star adaptive optics system (LGSAO) along with archival Hubble Space Telescope data. This is the deepest search yet performed for the progenitor of any type Ib/c event in a wide wavelength range stretching from the far UV to the near IR. We determine that the progenitor of SN 2004gt was most likely less luminous than MV = −5.5 and MB = −6.5 magnitudes. The massive stars exploding as hydrogen-deficient core-collapse supernovae (SNe) should have lost their outer hydrogen envelopes prior to their explosion, either through winds – such stars are identified within our Galaxy as as Wolf-Rayet (W-R) stars – or to a binary companion. The luminosity limits we set rule out more than half of the known galactic W-R stars as possible progenitors of this event. In particular, they imply that a W-R progenitor should have been among the more-evolved (highly stripped, less luminous) of these stars, a concrete constraint on its evolutionary state just prior to core collapse.
    [Show full text]
  • II. Observational Constraints on the Progenitors of Type Ibc Supernovae
    MNRAS 436, 774–795 (2013) doi:10.1093/mnras/stt1612 Advance Access publication 2013 October 1 The death of massive stars – II. Observational constraints on the progenitors of Type Ibc supernovae John J. Eldridge,1‹ Morgan Fraser,2 Stephen J. Smartt,2 Justyn R. Maund2 and R. Mark Crockett2 1The Department of Physics, The University of Auckland, Private Bag 92019, Auckland, New Zealand 2Astrophysics Research Centre, School of Mathematics and Physics, Queen’s University Belfast, Belfast BT7 1NN, UK Accepted 2013 August 23. Received 2013 August 23; in original form 2013 January 4 Downloaded from ABSTRACT The progenitors of many Type II core-collapse supernovae (SNe) have now been identified directly on pre-discovery imaging. Here, we present an extensive search for the progenitors of Type Ibc SNe in all available pre-discovery imaging since 1998. There are 12 Type Ibc http://mnras.oxfordjournals.org/ SNe with no detections of progenitors in either deep ground-based or Hubble Space Telescope archival imaging. The deepest absolute BVR magnitude limits are between −4 and −5mag. We compare these limits with the observed Wolf–Rayet population in the Large Magellanic Cloud and estimate a 16 per cent probability that we have failed to detect such a progenitor by chance. Alternatively, the progenitors evolve significantly before core-collapse or we have underestimated the extinction towards the progenitors. Reviewing the relative rates and ejecta mass estimates from light-curve modelling of Ibc SNe, we find both incompatible with Wolf– Rayet stars with initial masses >25 M being the only progenitors. We present binary evolution at California Institute of Technology on December 2, 2013 models that fit these observational constraints.
    [Show full text]
  • VLT/FORS Surveys of Wolf-Rayet Stars Beyond the Local Group: Type Ib/C Supernova Progenitors?
    Astronomical Science VLT/FORS Surveys of Wolf-Rayet Stars beyond the Local Group: Type Ib/c Supernova Progenitors? Paul A. Crowther, Lucy J. Hadfield unless hydrogen-rich material is mixed external galaxies. Notably, narrowband (University of Sheffield, United Kingdom) downwards from the outer zones. interference filter techniques have been independently developed by Moffat and Once the core hydrogen is exhausted, the Massey that permit their detection from Wolf-Rayet (WR) stars are the chemical- star leaves the main sequence and be- their strong emission lines at He II λ 4686 ly evolved descendents of O stars, comes a blue supergiant, and ultimately a (WN stars) and C III λ 4650 (WC stars) such that they trace massive star forma- red supergiant (RSG) for stars with initial with respect to their nearby continuum. tion. Here we present results of recent mass up to perhaps 20–30 MA. Observa- Such techniques have been applied to VLT/FORS surveys of WR stars in near - tionally, there is an absence of luminous regions of the Milky Way disc, the Magel- by spiral and irregular galaxies and RSGs, known as the Humphreys-David- lanic Clouds and other Local Group gal- consider individual WR stars as progen- son limit, such that initially more massive axies. itors of Type Ib/c core-collapse super- stars circumvent the RSG phase, pass novae. Young massive clusters hosting through a Luminous Blue Variable stage, It is well established that the absolute large WR populations may be used as before ending their life as Wolf-Rayet number of WR stars and their subtype templates for high-redshift Lyman break (WR) stars, exhibiting either the products distribution are metallicity dependent.
    [Show full text]
  • L99 the BIRTH PLACE of the TYPE IC SUPERNOVA 2007Gr R
    The Astrophysical Journal, 672:L99–L102, 2008 January 10 ൴ ᭧ 2008. The American Astronomical Society. All rights reserved. Printed in U.S.A. THE BIRTH PLACE OF THE TYPE IC SUPERNOVA 2007gr R. Mark Crockett,1 Justyn R. Maund,2 Stephen J. Smartt,1 Seppo Mattila,1,3 Andrea Pastorello,1 Jonathan Smoker,1 Andrew W. Stephens,4 Johan Fynbo,5 John J. Eldridge,1 I. John Danziger,6,7 and Christopher R. Benn8 Received 2007 September 14; accepted 2007 November 27; published 2007 December 17 ABSTRACT We report our attempts to locate the progenitor of the peculiar Type Ic SN 2007gr in Hubble Space Telescope (HST) preexplosion images of the host galaxy, NGC 1058. Aligning adaptive optics Altair/NIRI imaging of SN 2007gr from the Gemini (North) Telescope with the preexplosion HST WFPC2 images, we identify the supernova (SN) position on the HST frames with an accuracy of 20 mas. Although nothing is detected at the SN position, mas (6.9 pc) from its nominal center. On the basis 23 ע we show that it lies on the edge of a bright source,134 of its luminosity, we suggest that this object is possibly an unresolved, compact, and coeval cluster and that the SN progenitor was a cluster member, although we note that model profile fitting favors a single bright star. We ע find two solutions for the age of this assumed cluster:7 ϯ 0.5 Myr and 20–30 Myr, with turnoff masses of 28 4 M, and 12–9 M,, respectively. Preexplosion ground-based K-band images marginally favor the younger cluster age/higher turnoff mass.
    [Show full text]
  • Progenitor Mass Constraints for Core-Collapse Supernovae
    Mon. Not. R. Astron. Soc. 000, 1–20 (2012) Printed 8 August 2018 (MN LATEX style file v2.2) Progenitor mass constraints for core-collapse supernovae from correlations with host galaxy star formation⋆ J. P. Anderson1†, S. M. Habergham2, P. A. James2 & M. Hamuy1 1Departamento de Astronom´ıa, Universidad de Chile, Casilla 36-D, Santiago, Chile 2Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead, CH41 1LD, UK ABSTRACT Using Hα emission as a tracer of on-going (<16 Myr old) and near-UV emission as a tracer of recent (16-100 Myr old) star formation, we present constraints on the properties of core- collapse supernova progenitors through the association of their explosion sites with star form- ing regions. Amalgamating previous results with those gained from new data, we present statistics of a large sample of supernovae; 163.5 type II (58 IIP, 13 IIL, 13.5 IIb, 19 IIn and 12 ‘impostors’, plus 48 with no sub-type classification) and 96.5 type Ib/c (39.5 Ib and 52 Ic, plus 5 with no sub-type classification). Using pixel statistics we build distributions of asso- ciations of different supernova types with host galaxy star formation. Our main findings and conclusions are: 1) An increasing progenitor mass sequence is observed, implied from an increasing associ- ation of supernovae to host galaxy Hα emission. This commences with the type Ia showing the weakest association, followed by the type II, then the Ib, with the Ic showing the strongest correlation to star forming regions. Thus our progenitor mass sequence runs Ia-II-Ib-Ic.
    [Show full text]
  • Arxiv:1305.1105V1 [Astro-Ph.CO]
    Accepted to the Astronomical Journal A Preprint typeset using LTEX style emulateapj v. 5/2/11 INTEGRAL FIELD SPECTROSCOPY OF SUPERNOVA EXPLOSION SITES: CONSTRAINING MASS AND METALLICITY OF THE PROGENITORS - I. TYPE IB AND IC SUPERNOVAE Hanindyo Kuncarayakti Kavli Institute for the Physics and Mathematics of the Universe, the University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583, Japan Institute of Astronomy, Graduate School of Science, the University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo 181-0015, Japan and Department of Astronomy, Graduate School of Science, the University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan Mamoru Doi Institute of Astronomy, Graduate School of Science, the University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo 181-0015, Japan and Research Center for the Early Universe, the University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan Greg Aldering Physics Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 Nobuo Arimoto National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-0015, Japan and Subaru Telescope, National Astronomical Observatory of Japan, 650 North A’ohoku Place, Hilo, HI 96720 Keiichi Maeda Kavli Institute for the Physics and Mathematics of the Universe, the University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583, Japan Tomoki Morokuma Institute of Astronomy, Graduate School of Science, the University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo 181-0015, Japan Rui Pereira CNRS/IN2P3, Institut de Physique Nucl´eaire de
    [Show full text]
  • The Caldwell Catalogue Contents
    The Caldwell Catalogue Contents 1 Overview 1 1.1 Caldwell catalogue ........................................... 1 1.1.1 Caldwell Star Chart ...................................... 1 1.1.2 Number of objects by type in the Caldwell catalogue. .................... 1 1.1.3 Caldwell objects ....................................... 1 1.1.4 See also ............................................ 2 1.1.5 References .......................................... 2 1.1.6 External links ......................................... 2 1.2 Patrick Moore ............................................. 2 1.2.1 Early life ........................................... 2 1.2.2 Career in astronomy ...................................... 3 1.2.3 Activism and political beliefs ................................. 5 1.2.4 Other interests and popular culture .............................. 5 1.2.5 Honours and appointments .................................. 6 1.2.6 Bibliography ......................................... 7 1.2.7 Film and television appearances ................................ 7 1.2.8 See also ............................................ 7 1.2.9 References .......................................... 7 1.2.10 External links ......................................... 9 2 Objects 10 2.1 Caldwell 1 ............................................... 10 2.1.1 References .......................................... 10 2.1.2 External links ......................................... 10 2.2 Caldwell 2 ............................................... 10 2.2.1 Gallery ...........................................
    [Show full text]