Gregory R. Sivakoff
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Astronomy & Astrophysics Background Galaxies As Reddening
A&A 371, 895–907 (2001) Astronomy DOI: 10.1051/0004-6361:20010467 & c ESO 2001 Astrophysics Background galaxies as reddening probes throughout the Magellanic Clouds C. M. Dutra1,3,E.Bica1,3,J.J.Clari´a2,3,A.E.Piatti2,3, and A. V. Ahumada2,3 1 Instituto de Fisica-UFRGS, CP 15051, CEP 91501-970 POA – RS, Brazil 2 Observatorio Astron´omico de C´ordoba, Laprida 854, 5000, C´ordoba, Argentina 3 Visiting Astronomer, Complejo Astron´omico El Leoncito operated under agreement between the Consejo Nacional de Investigaciones Cient´ıficas y T´ecnicas de la Rep´ublica Argentina and the National Universities of La Plata, C´ordoba and San Juan Received 3 January 2001 / Accepted 23 March 2001 Abstract. We study the spectral properties in the range 3600 A–6800˚ A˚ of the nuclear region of galaxies behind the Magellanic Clouds. The radial velocities clarified the nature of the objects as background galaxies or extended objects belonging to the Clouds. For most galaxies behind the main bodies of the LMC and SMC, radial velocities were measured for the first time. In the present sample typical LMC background galaxies are nearby (4000 <V(km s−1) < 6000), while SMC’s are considerably more distant (10 000 <V(km s−1) < 20 000). We determine the reddening in each line of sight by matching a reddening-free galaxy template with comparable stellar population. For the LMC main body we derive a combined Milky Way and internal reddening value E(B−V )MW+i =0.120.10, while for the SMC E(B−V )MW+i =0.050.05. -
LNA Relatorio 2008
MINISTÉRIO DA CIÊNCIA E TECNOLOGIA SECRETARIA - EXECUTIVA SUBSECRETARIIA DE COORDENAÇÃO DAS UNIIDADES DE PESQUIISA TERMO DE COMPROMISSO DE GESTÃO 2008 Unidade de Pesquisa LNA Laboratório Nacional de Astrofísica Relatório Anual Sumário O balanço do ano 2008 é bastante positivo para o LNA. Foram encaminhadas e/ou realizadas diversas medidas para aprimorar os serviços do LNA para a comunidade astronômica e para a gestão institucional. Destacamos aqui os itens mais importantes: a) Foi criada a revista eletrônica “LNA em Dia”, com período de publicação bi-mensal. O LNA responde, desta forma, às críticas, muitas vezes justificadas, de não sempre fornecer todas as informações úteis aos seus usuários sobre as atividades do LNA e o estado das instalações por ele mantidas. Com o “LNA em Dia” temos uma ferramenta importante para fortalecer os laços entre a comunidade e o LNA. b) O LNA participou de um consórcio internacional, liderado pelo Jet Propulsion Laboratory – JPL, Estados Unidos, para realizar um estudo detalhado para o espectrógrafo WFMOS (Wide Field Multi-Object Spectrograph) para o Observatório Gemini (talvez o espectrógrafo astronômico mais ambicioso já concebido). Em paralelo, o LNA, superando grandes obstáculos jurídicos, conseguiu preparar uma estrutura contratual que permite sua participação efetiva na fase da construção do WFMOS, caso o Gemini decide pela construção. c) Para aliviar, pelo menos parcialmente, o grande problema do LNA, que é a falta de pessoal qualificado para as numerosas novas atribuições assumidas pela instituição nos últimos anos, o LNA terceirizou atividades, dentro do legalmente possível, com o intuito de desafogar os pesquisadores e tecnologistas, o máximo possível, de atividades que podem ser realizadas por pessoas menos qualificadas, e para que, desta forma, eles possam concentrarem-se em atividades que exijam sua alta qualificação. -
OBSERVING GALAXIES in ANDROMEDA As You Look Towards
OBSERVING GALAXIES IN ANDROMEDA As you look towards Andromeda you are looking out into deep space underneath the Perseus spiral arm of our milky way. The constellation has a good density of observable galaxies. There is a group of relatively local galaxies which are less than 20 million light years away and then a big gap to the rest which are over 200 million light years away. The constellation is well place from late summer to mid-winter. M31 / M32 / M110 These galaxies are generally the first galaxies that amateur astronomers observe first. M31 is visible to the naked eye in dark skies. M31 whilst bright and large is fairly bland in appearance until you start to look a bit closer. With good conditions, the dark line of a dust lane is visible. I have to say that observing two of the globular clusters of this galaxy rank up there in my most memorable observations ever. M32 is very bright and I have seen it in binoculars as a very small bright blob. M110 can be a challenge to see with its low surface brightness. Having said that, I have seen it easily in my 80mm binoculars when the sky was transparent. NGC404 This galaxy is memorable to observe as it is close to the star Mirach and hence is known as Mirach’s ghost. It is a lovely circular low surface brightness glow that is visible with direct vision in my 10 inch reflector and was visible at low power with averted vision even with Mirach in the field of view. -
And – Objektauswahl NGC Teil 1
And – Objektauswahl NGC Teil 1 NGC 5 NGC 49 NGC 79 NGC 97 NGC 184 NGC 233 NGC 389 NGC 531 Teil 1 NGC 11 NGC 51 NGC 80 NGC 108 NGC 205 NGC 243 NGC 393 NGC 536 NGC 13 NGC 67 NGC 81 NGC 109 NGC 206 NGC 252 NGC 404 NGC 542 Teil 2 NGC 19 NGC 68 NGC 83 NGC 112 NGC 214 NGC 258 NGC 425 NGC 551 NGC 20 NGC 69 NGC 85 NGC 140 NGC 218 NGC 260 NGC 431 NGC 561 NGC 27 NGC 70 NGC 86 NGC 149 NGC 221 NGC 262 NGC 477 NGC 562 NGC 29 NGC 71 NGC 90 NGC 160 NGC 224 NGC 272 NGC 512 NGC 573 NGC 39 NGC 72 NGC 93 NGC 169 NGC 226 NGC 280 NGC 523 NGC 590 NGC 43 NGC 74 NGC 94 NGC 181 NGC 228 NGC 304 NGC 528 NGC 591 NGC 48 NGC 76 NGC 96 NGC 183 NGC 229 NGC 317 NGC 529 NGC 605 Sternbild- Zur Objektauswahl: Nummer anklicken Übersicht Zur Übersichtskarte: Objekt in Aufsuchkarte anklicken Zum Detailfoto: Objekt in Übersichtskarte anklicken And – Objektauswahl NGC Teil 2 NGC 620 NGC 709 NGC 759 NGC 891 NGC 923 NGC 1000 NGC 7440 NGC 7836 Teil 1 NGC 662 NGC 710 NGC 797 NGC 898 NGC 933 NGC 7445 NGC 668 NGC 712 NGC 801 NGC 906 NGC 937 NGC 7446 Teil 2 NGC 679 NGC 714 NGC 812 NGC 909 NGC 946 NGC 7449 NGC 687 NGC 717 NGC 818 NGC 910 NGC 956 NGC 7618 NGC 700 NGC 721 NGC 828 NGC 911 NGC 980 NGC 7640 NGC 703 NGC 732 NGC 834 NGC 912 NGC 982 NGC 7662 NGC 704 NGC 746 NGC 841 NGC 913 NGC 995 NGC 7686 NGC 705 NGC 752 NGC 845 NGC 914 NGC 996 NGC 7707 NGC 708 NGC 753 NGC 846 NGC 920 NGC 999 NGC 7831 Sternbild- Zur Objektauswahl: Nummer anklicken Übersicht Zur Übersichtskarte: Objekt in Aufsuchkarte anklicken Zum Detailfoto: Objekt in Übersichtskarte anklicken Auswahl And SternbildübersichtAnd -
7.5 X 11.5.Threelines.P65
Cambridge University Press 978-0-521-19267-5 - Observing and Cataloguing Nebulae and Star Clusters: From Herschel to Dreyer’s New General Catalogue Wolfgang Steinicke Index More information Name index The dates of birth and death, if available, for all 545 people (astronomers, telescope makers etc.) listed here are given. The data are mainly taken from the standard work Biographischer Index der Astronomie (Dick, Brüggenthies 2005). Some information has been added by the author (this especially concerns living twentieth-century astronomers). Members of the families of Dreyer, Lord Rosse and other astronomers (as mentioned in the text) are not listed. For obituaries see the references; compare also the compilations presented by Newcomb–Engelmann (Kempf 1911), Mädler (1873), Bode (1813) and Rudolf Wolf (1890). Markings: bold = portrait; underline = short biography. Abbe, Cleveland (1838–1916), 222–23, As-Sufi, Abd-al-Rahman (903–986), 164, 183, 229, 256, 271, 295, 338–42, 466 15–16, 167, 441–42, 446, 449–50, 455, 344, 346, 348, 360, 364, 367, 369, 393, Abell, George Ogden (1927–1983), 47, 475, 516 395, 395, 396–404, 406, 410, 415, 248 Austin, Edward P. (1843–1906), 6, 82, 423–24, 436, 441, 446, 448, 450, 455, Abbott, Francis Preserved (1799–1883), 335, 337, 446, 450 458–59, 461–63, 470, 477, 481, 483, 517–19 Auwers, Georg Friedrich Julius Arthur v. 505–11, 513–14, 517, 520, 526, 533, Abney, William (1843–1920), 360 (1838–1915), 7, 10, 12, 14–15, 26–27, 540–42, 548–61 Adams, John Couch (1819–1892), 122, 47, 50–51, 61, 65, 68–69, 88, 92–93, -
The X-Ray Halo Scaling Relations of Supermassive Black Holes M
Draft version October 24, 2019 Preprint typeset using LATEX style emulateapj gaspari-mod v. apr19 THE X-RAY HALO SCALING RELATIONS OF SUPERMASSIVE BLACK HOLES M. Gaspari1;∗;y, D. Eckert2, S. Ettori3;4, P. Tozzi5, L. Bassini6;7, E. Rasia6;8, F. Brighenti9, M. Sun10, S. Borgani6;7;8;11, S. D. Johnson1;12;z, G. R. Tremblay13, J. M. Stone1, P. Temi14, H.-Y. K. Yang15;16, F. Tombesi17;15;18;19, M. Cappi3 1 Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544-1001, USA 2 Department of Astronomy, University of Geneva, ch. d’Ecogia 16, 1290 Versoix, Switzerland 3 INAF, Osservatorio di Astrofisica e Scienza dello Spazio, via Pietro Gobetti 93/3, 40129 Bologna, Italy 4 INFN, Sezione di Bologna, viale Berti Pichat 6/2, I-40127 Bologna, Italy 5 INAF, Astronomy Observatory of Florence, Largo Enrico Fermi 5, 50125, Firenze, Italy 6 INAF - Osservatorio Astronomico di Trieste, via Tiepolo 11, 34122, Trieste, Italy 7 Astronomy Unit, Department of Physics, University of Trieste, via Tiepolo 11, I-34131 Trieste, Italy 8 IFPU - Institute for Fundamental, Physics of the Universe, Via Beirut 2, 34014 Trieste, Italy 9 Dipartimento di Fisica e Astronomia, Università di Bologna, via Gobetti 93, 40127 Bologna, Italy 10 Physics Department, University of Alabama in Huntsville, Huntsville, AL 35899, USA 11 INFN - National Institute for Nuclear Physics, Via Valerio 2, I-34127 Trieste, Italy 12 The Observatories of the Carnegie Institution for Science, 813 Santa Barbara Street, Pasadena, CA 91101, USA 13 Center for Astrophysics -
GALEX UV COLOR RELATIONS for NEARBY EARLY-TYPE GALAXIES Jose´ Donas,1 Jean-Michel Deharveng,1 R
The Astrophysical Journal Supplement Series, 173:597Y606, 2007 December # 2007. The American Astronomical Society. All rights reserved. Printed in U.S.A. GALEX UV COLOR RELATIONS FOR NEARBY EARLY-TYPE GALAXIES Jose´ Donas,1 Jean-Michel Deharveng,1 R. Michael Rich,2 Sukyoung K. Yi,3 Young-Wook Lee,3 Alessandro Boselli,1 Armando Gil de Paz,4 Samuel Boissier,1 Ste´phane Charlot,5 Samir Salim,2 Luciana Bianchi,6 Tom A. Barlow,7 Karl Forster,7 Peter G. Friedman,7 Timothy M. Heckman,8 Barry F. Madore,9 D. Christopher Martin,7 Bruno Milliard,1 Patrick Morrissey,7 Susan G. Neff,10 David Schiminovich,11 Mark Seibert,7 Todd Small,7 Alex S. Szalay,8 Barry Y. Welsh,12 and Ted K. Wyder7 Received 2006 May 4; accepted 2006 July 20 ABSTRACT We use GALEX/optical photometry to construct color-color relationships for early-type galaxies sorted by mor- phological type. We have matched objects in the GALEX GR1 public release and the first IR1.1 internal release, with the RC3 early-type galaxies having a morphological type À5:5 T < À1:5, with mean error on T < 1:5 and mean error on (B À V )T < 0:05. After visual inspection of each match, we are left with 130 galaxies with reliable GALEX pipeline photometry in the far-UVand near-UV bands. This sample is divided into ellipticals (À5:5 T < À3:5) and lenticulars (À3:5 T < À1:5). After correction for Galactic extinction, the color-color diagrams FUV À NUV versus (B À V )Tc are plotted for the two subsamples. -
Making a Sky Atlas
Appendix A Making a Sky Atlas Although a number of very advanced sky atlases are now available in print, none is likely to be ideal for any given task. Published atlases will probably have too few or too many guide stars, too few or too many deep-sky objects plotted in them, wrong- size charts, etc. I found that with MegaStar I could design and make, specifically for my survey, a “just right” personalized atlas. My atlas consists of 108 charts, each about twenty square degrees in size, with guide stars down to magnitude 8.9. I used only the northernmost 78 charts, since I observed the sky only down to –35°. On the charts I plotted only the objects I wanted to observe. In addition I made enlargements of small, overcrowded areas (“quad charts”) as well as separate large-scale charts for the Virgo Galaxy Cluster, the latter with guide stars down to magnitude 11.4. I put the charts in plastic sheet protectors in a three-ring binder, taking them out and plac- ing them on my telescope mount’s clipboard as needed. To find an object I would use the 35 mm finder (except in the Virgo Cluster, where I used the 60 mm as the finder) to point the ensemble of telescopes at the indicated spot among the guide stars. If the object was not seen in the 35 mm, as it usually was not, I would then look in the larger telescopes. If the object was not immediately visible even in the primary telescope – a not uncommon occur- rence due to inexact initial pointing – I would then scan around for it. -
Ngc Catalogue Ngc Catalogue
NGC CATALOGUE NGC CATALOGUE 1 NGC CATALOGUE Object # Common Name Type Constellation Magnitude RA Dec NGC 1 - Galaxy Pegasus 12.9 00:07:16 27:42:32 NGC 2 - Galaxy Pegasus 14.2 00:07:17 27:40:43 NGC 3 - Galaxy Pisces 13.3 00:07:17 08:18:05 NGC 4 - Galaxy Pisces 15.8 00:07:24 08:22:26 NGC 5 - Galaxy Andromeda 13.3 00:07:49 35:21:46 NGC 6 NGC 20 Galaxy Andromeda 13.1 00:09:33 33:18:32 NGC 7 - Galaxy Sculptor 13.9 00:08:21 -29:54:59 NGC 8 - Double Star Pegasus - 00:08:45 23:50:19 NGC 9 - Galaxy Pegasus 13.5 00:08:54 23:49:04 NGC 10 - Galaxy Sculptor 12.5 00:08:34 -33:51:28 NGC 11 - Galaxy Andromeda 13.7 00:08:42 37:26:53 NGC 12 - Galaxy Pisces 13.1 00:08:45 04:36:44 NGC 13 - Galaxy Andromeda 13.2 00:08:48 33:25:59 NGC 14 - Galaxy Pegasus 12.1 00:08:46 15:48:57 NGC 15 - Galaxy Pegasus 13.8 00:09:02 21:37:30 NGC 16 - Galaxy Pegasus 12.0 00:09:04 27:43:48 NGC 17 NGC 34 Galaxy Cetus 14.4 00:11:07 -12:06:28 NGC 18 - Double Star Pegasus - 00:09:23 27:43:56 NGC 19 - Galaxy Andromeda 13.3 00:10:41 32:58:58 NGC 20 See NGC 6 Galaxy Andromeda 13.1 00:09:33 33:18:32 NGC 21 NGC 29 Galaxy Andromeda 12.7 00:10:47 33:21:07 NGC 22 - Galaxy Pegasus 13.6 00:09:48 27:49:58 NGC 23 - Galaxy Pegasus 12.0 00:09:53 25:55:26 NGC 24 - Galaxy Sculptor 11.6 00:09:56 -24:57:52 NGC 25 - Galaxy Phoenix 13.0 00:09:59 -57:01:13 NGC 26 - Galaxy Pegasus 12.9 00:10:26 25:49:56 NGC 27 - Galaxy Andromeda 13.5 00:10:33 28:59:49 NGC 28 - Galaxy Phoenix 13.8 00:10:25 -56:59:20 NGC 29 See NGC 21 Galaxy Andromeda 12.7 00:10:47 33:21:07 NGC 30 - Double Star Pegasus - 00:10:51 21:58:39 -
Supermassive Black Holes May Be Lurking Everywhere in the Universe 6 April 2016
Supermassive black holes may be lurking everywhere in the universe 6 April 2016 MASSIVE Survey, a study of the most massive galaxies and black holes in the local universe with the goal of understanding how they form and grow supermassive. While finding a gigantic black hole in a massive galaxy in a crowded area of the universe is to be expected - like running across a skyscraper in Manhattan - it seemed less likely they could be found in the universe's small towns. "Rich groups of galaxies like the Coma Cluster are very, very rare, but there are quite a few galaxies the size of NGC 1600 that reside in average-size galaxy groups," Ma said. "So the question now is, A sky survey image of the massive galaxy NGC 1600, 'Is this the tip of an iceberg?' Maybe there are a lot and a Hubble Space Telescope closeup of the bright more monster black holes out there that don't live in center of the galaxy where the 17-billion-solar-mass a skyscraper in Manhattan, but in a tall building black hole -- or binary black hole -- resides. Credit: somewhere in the Midwestern plains." ESA/Hubble image courtesy of STScI. While the black hole discovered in 2011 in the galaxy NGC 4889 in the Coma Cluster was estimated to have an upper limit of 21 billion solar A near-record supermassive black hole discovered masses, its range of possible masses was large: in a sparse area of the local universe indicates that between 3 billion and 21 billion suns. The 17-billion- these monster objects - this one equal to 17 billion solar-mass estimate for the central black hole in suns - may be more common than once thought, NGC 1600 is much more precise, with a range according to University of California, Berkeley, (standard deviation) of 15.5 to 18.5 billion solar astronomers. -
SOAR Publications Sorted by Year Then Author (Last Updated March 10, 2015 by Karianne Holhjem)
SOAR publications Sorted by year then author (Last updated March 10, 2015 by Karianne Holhjem) ⇒If your publication(s) are not listed in this document, please fill in this form to enable us to keep a complete list of SOAR publications. Contents 1 Refereed papers 1 2 Conference proceedings 27 3 SPIE Conference Series 32 4 PhD theses 38 5 Meeting (incl. AAS) abstracts 39 6 Circulars 47 7 ArXiv 53 8 Other 53 1 Refereed papers (2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005) 2015 [1] Lindsay, S. S., Marchis, F., Emery, J. P., Enriquez, J. E., & Assafin, M. 2015 Feb, Composition, mineralogy, and porosity of multiple asteroid systems from visible and near-infrared spectral data, Icarus, 247, 53 URL http://adsabs.harvard.edu/abs/2015Icar..247...53L [2] Martinazzi, E., Kepler, S. O., Costa, J. E. S., Pieres, A., Bonatto, C., Bica, E., & Fraga, L. 2015 Mar, New SX Phe variables in the globular cluster NGC 288, MNRAS, 447, 2235 URL http://adsabs.harvard.edu/abs/2015MNRAS.447.2235M [3] Schimoia, J. S., Storchi-Bergmann, T., Grupe, D., Eracleous, M., Peterson, B. M., Baldwin, J. A., Nemmen, R. S., & Winge, C. 2015 Feb, Short-timescale Monitoring of the X-Ray, UV, and Broad Double-peak Emission Line of the Nucleus of NGC 1097, ApJ, 800, 63 URL http://adsabs.harvard.edu/abs/2015ApJ...800...63S [4] Strader, J., Chomiuk, L., Cheung, C. C., Sand, D. J., Donato, D., Corbet, R., Koeppe, D., Edwards, P. G., Stevens, J., Petrov, L., Salinas, R., Peacock, M., Finzell, T., Reichart, D., & Haislip, J. -
SOAR Publications Sorted by Year Then Author (Last Updated November 24, 2016 by Nicole Auza)
No longer maintained, see home page for current information! SOAR publications Sorted by year then author (Last updated November 24, 2016 by Nicole Auza) ⇒If your publication(s) are not listed in this document, please fill in this form to enable us to keep a complete list of SOAR publications. Contents 1 Refereed papers 1 2 Conference proceedings 35 3 SPIE Conference Series 39 4 PhD theses 46 5 Meeting (incl. AAS) abstracts 47 6 Circulars 55 7 ArXiv 60 8 Other 61 1 Refereed papers (2016,2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005) 2016 [1] Alvarez-Candal, A., Pinilla-Alonso, N., Ortiz, J. L., Duffard, R., Morales, N., Santos- Sanz, P., Thirouin, A., & Silva, J. S. 2016 Feb, Absolute magnitudes and phase coefficients of trans-Neptunian objects, A&A, 586, A155 URL http://adsabs.harvard.edu/abs/2016A%26A...586A.155A [2] A´lvarez Crespo, N., Masetti, N., Ricci, F., Landoni, M., Pati˜no-Alvarez,´ V., Mas- saro, F., D’Abrusco, R., Paggi, A., Chavushyan, V., Jim´enez-Bail´on, E., Torrealba, J., Latronico, L., La Franca, F., Smith, H. A., & Tosti, G. 2016 Feb, Optical Spectro- scopic Observations of Gamma-ray Blazar Candidates. V. TNG, KPNO, and OAN Observations of Blazar Candidates of Uncertain Type in the Northern Hemisphere, AJ, 151, 32 URL http://adsabs.harvard.edu/abs/2016AJ....151...32A [3] A´lvarez Crespo, N., Massaro, F., Milisavljevic, D., Landoni, M., Chavushyan, V., Pati˜no-Alvarez,´ V., Masetti, N., Jim´enez-Bail´on, E., Strader, J., Chomiuk, L., Kata- giri, H., Kagaya, M., Cheung, C.