Diffuse Interstellar Bands in Upper Scorpius
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The Co-Existence of Hot and Cold Gas in Debris Discs? I
A&A 614, A3 (2018) https://doi.org/10.1051/0004-6361/201732329 Astronomy & © ESO 2018 Astrophysics The co-existence of hot and cold gas in debris discs? I. Rebollido1, C. Eiroa1, B. Montesinos2, J. Maldonado3, E. Villaver1, O. Absil4, A. Bayo5,6, H. Canovas1,7, A. Carmona8, Ch. Chen9, S. Ertel10, A. Garufi1, Th. Henning11, D. P. Iglesias5,6, R. Launhardt11, R. Liseau12, G. Meeus1, A. Moór13, A. Mora14, J. Olofsson5,6, G. Rauw4, and P. Riviere-Marichalar15 1 Departamento. Física Teórica, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain e-mail: [email protected] 2 Centro de Astrobiología (CAB, CSIC-INTA), ESAC Campus, Camino Bajo del Castillo s/n, Villanueva de la Cañada, 28692 Madrid, Spain 3 INAF, Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy 4 STAR Institute, Université de Liège, F.R.S.-FNRS, 19c Allée du Six Août, 4000 Liège, Belgium 5 Instituto de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, Casilla, 5030 Valparaíso, Chile 6 Núcleo Milenio de Formación Planetaria-NPF, Universidad de Valparaíso, Av. Gran Bretaña, 1111 Valparaíso, Chile 7 European Space Astronomy Centre (ESA), PO Box 78, Villanueva de la Cañada, 28691 Madrid, Spain 8 Université de Toulouse, UPS-OMP, IRAP, 31400 Toulouse, France 9 Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21212, USA 10 Steward Observatory, Department of Astronomy, University of Arizona, Tucson, AZ 85721, USA 11 Max-Planck-Institut für Astronomie (MPIA), Königstuhl 17, 69117 Heidelberg, Germany 12 Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, 439 92 Onsala, Sweden 13 Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, PO Box 67, 1525 Budapest, Hungary 14 Aurora Technology B.V. -
The Co-Existence of Hot and Cold Gas in Debris Discs
The co-existence of hot and cold gas in debris discs Downloaded from: https://research.chalmers.se, 2021-09-25 13:51 UTC Citation for the original published paper (version of record): Rebollido, I., Eiroa, C., Montesinos, B. et al (2018) The co-existence of hot and cold gas in debris discs Astronomy and Astrophysics, 614 http://dx.doi.org/10.1051/0004-6361/201732329 N.B. When citing this work, cite the original published paper. research.chalmers.se offers the possibility of retrieving research publications produced at Chalmers University of Technology. It covers all kind of research output: articles, dissertations, conference papers, reports etc. since 2004. research.chalmers.se is administrated and maintained by Chalmers Library (article starts on next page) A&A 614, A3 (2018) https://doi.org/10.1051/0004-6361/201732329 Astronomy & © ESO 2018 Astrophysics The co-existence of hot and cold gas in debris discs? I. Rebollido1, C. Eiroa1, B. Montesinos2, J. Maldonado3, E. Villaver1, O. Absil4, A. Bayo5,6, H. Canovas1,7, A. Carmona8, Ch. Chen9, S. Ertel10, A. Garufi1, Th. Henning11, D. P. Iglesias5,6, R. Launhardt11, R. Liseau12, G. Meeus1, A. Moór13, A. Mora14, J. Olofsson5,6, G. Rauw4, and P. Riviere-Marichalar15 1 Departamento. Física Teórica, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain e-mail: [email protected] 2 Centro de Astrobiología (CAB, CSIC-INTA), ESAC Campus, Camino Bajo del Castillo s/n, Villanueva de la Cañada, 28692 Madrid, Spain 3 INAF, Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy 4 STAR Institute, Université de Liège, F.R.S.-FNRS, 19c Allée du Six Août, 4000 Liège, Belgium 5 Instituto de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, Casilla, 5030 Valparaíso, Chile 6 Núcleo Milenio de Formación Planetaria-NPF, Universidad de Valparaíso, Av. -
Diffuse Interstellar Bands in Upper Scorpius: Probing Variations in the DIB Spectrum Due to Changing Environmental Conditions
UvA-DARE (Digital Academic Repository) Diffuse interstellar bands in Upper Scorpius: probing variations in the DIB spectrum due to changing environmental conditions Vos, D.A.I.; Cox, N.L.J.; Kaper, L.; Spaans, M.; Ehrenfreund, P. DOI 10.1051/0004-6361/200809746 Publication date 2011 Document Version Final published version Published in Astronomy & Astrophysics Link to publication Citation for published version (APA): Vos, D. A. I., Cox, N. L. J., Kaper, L., Spaans, M., & Ehrenfreund, P. (2011). Diffuse interstellar bands in Upper Scorpius: probing variations in the DIB spectrum due to changing environmental conditions. Astronomy & Astrophysics, 533. https://doi.org/10.1051/0004- 6361/200809746 General rights It is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulations If you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: https://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. UvA-DARE is a service provided by the library of the University of Amsterdam (https://dare.uva.nl) Download date:01 Oct 2021 A&A 533, A129 (2011) Astronomy DOI: 10.1051/0004-6361/200809746 & c ESO 2011 Astrophysics Diffuse interstellar bands in Upper Scorpius: probing variations in the DIB spectrum due to changing environmental conditions, D. -
The Co-Existence of Hot and Cold Gas in Debris Discs I
Astronomy & Astrophysics manuscript no. 32329_corrected_arxiv c ESO 2018 January 25, 2018 The co-existence of hot and cold gas in debris discs I. Rebollido1, C. Eiroa1, B. Montesinos2, J. Maldonado3, E. Villaver1, O. Absil4, A. Bayo5; 6, H. Canovas1; 7, A. Carmona8, Ch. Chen9, S. Ertel10, A. Garufi1, Th. Henning11, D. P. Iglesias5; 6, R. Launhardt11, R. Liseau12, G. Meeus1, A. Moór13, A. Mora14, J. Olofsson5; 6, G. Rauw4, and P. Riviere-Marichalar15 1 Dpto. Física Teórica, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain, e-mail: [email protected] 2 Centro de Astrobiología (CAB, CSIC-INTA), ESAC Campus, Camino Bajo del Castillo, s/n, 28692 Villanueva de la Cañada, Madrid, Spain 3 INAF, Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy 4 STAR Institute, Université de Liège, F.R.S.-FNRS, 19c Allée du Six Août, B-4000 Liège, Belgium 5 Instituto de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, 5030 Casilla, Valparaíso, Chile 6 Núcleo Milenio de Formación Planetaria - NPF, Universidad de Valparaíso, Av. Gran Bretaña 1111, Valparaíso, Chile 7 European Space Astronomy Centre (ESA), PO Box, 78, 28691 Villanueva de la Cañada, Madrid, Spain 8 Université de Toulouse, UPS-OMP, IRAP, Toulouse F-31400, France 9 Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21212, USA 10 Steward Observatory, Department of Astronomy, University of Arizona, Tucson, AZ 85721, USA 11 Max-Planck-Institut für Astronomie (MPIA), Königstuhl 17, D-69117 Heidelberg, Germany 12 Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala, Sweden 13 Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, PO Box 67, 1525 Budapest, Hungary 14 Aurora Technology B.V. -
July 2017 BRAS Newsletter
July 2017 Issue th Next Meeting: Saturday, July 15 , 11 a.m., at LIGO (This special meeting will NOT be held at the usual time and place.) PROGRAM: BRAS Potluck and LIGO Tour (Laser Interferometer Gravitational-Wave Observatory) 19100 LIGO Lane, Livingston, LA 70754 https://www.ligo.caltech.edu/LA What's In This Issue? President’s Message Secretary's Summary Outreach Report - FAE Event Photos Light Pollution Committee Report Recent Forum Entries 20/20 Vision Campaign Messages from the HRPO Perseid Meteor Shower Partial Solar Eclipse Observing Notes – Scorpius –The Scorpion & Mythology Like this newsletter? See past issues back to 2009 at http://brastro.org/newsletters.html Newsletter of the Baton Rouge Astronomical Society July 2017 President’s Message July is here, half the year is gone. This month’s meeting will be at LIGO in Livingston on July 15th, along with the pot luck picnic, gates will open to BRAS members and family members at 11:00 a.m. After the picnic and a short meeting, we will assist LIGO on their public day along with solar viewing. If you and yours have not been to LIGO, you are in for a treat! Open to the public from 1 to 5 p.m. We will sell a few more tickets for the Meade telescope, and then announce the winner! Last month’s riddle winners, Scott Cadwallader, Bart Bennet, and Roz Readinger will get their free raffle tickets for being the first 3 to send me the answer to last month’s question, if they show up at the picnic. -
High S/N Echelle Spectroscopy in Young Stellar Groups II. Rotational
A&A manuscript no. (will be inserted by hand later) ASTRONOMY AND Your thesaurus codes are: ASTROPHYSICS 08.05.1; 08.06.2; 08.18.1; 10.15.2 Sco OB2 20.3.2018 High S/N Echelle Spectroscopy in Young Stellar Groups ⋆ II. Rotational Velocities of Early-Type Stars in Sco OB2 A.G.A. Brown@1, W. Verschueren@2,1 @1 Sterrewacht Leiden, P.O. Box 9513, 2300 RA, Leiden, The Netherlands @2 University of Antwerp (RUCA), Astrophysics Research Group, Groenenborgerlaan 171, 2020 Antwerpen, Belgium Received... , accepted... Abstract. We investigate the rotational velocities of 1. Introduction early-type stars in the Sco OB2 association. We measure vsini for 156 established and probable members of the An outstanding problem in theories of star formation association. The measurements are performed with three is the so-called angular momentum problem. Molecular different techniques, which are in increasing order of ex- clouds and cloud cores, even if they spin about their axis pected vsini: 1) converting the widths of spectral lines di- only once per Galactic rotation, contain much more an- rectly to vsini, 2) comparing artificially broadened spectra gular momentum than the stars that form from them (see of low vsini stars to the target spectrum, 3) comparing the e.g., Spitzer 1968). Observations suggest that an inter- i He λ4026 line profile to theoretical models. The sample is stellar parent cloud must lose at least two to four or- extended with literature data for 47 established members ders of magnitude of angular momentum for a relatively of Sco OB2. Analysis of the vsini distributions shows that wide binary system and a single star, respectively, to be- there are no significant differences between the subgroups come dynamically possible (see Mouschovias 1991). -
Appendix A: Orbital Elements
Appendix A: Orbital Elements Many of the items in this Appendix have been explained elsewhere in the text, but, for clarity, they have been drawn together into this one section. The size and shape of a satellite’s orbit is determined by its speed and mass, and also by the mass of the object it is orbiting. The size, shape and orientation of an orbit can be described by six orbital elements or orbital parameters, known as Keplerian ele- ments or element sets. Different sets of elements can be used for different purposes. The terms used sound complicated, but taken individually each is relatively simple. These explanations have been taken with reference to an Earth-orbiting satellite, however, they can easily be adapted for satellites orbiting other celestial bodies. If all of the elements are known, the exact location of a satellite can be calculated. The Keplerian elements are: Inclination (i) Longitude of the ascending node (W) Argument of periapsis (w) Eccentricity (e) Semi-major axis (a) Anomaly at epoch (v) Time of periapsis or perigee passage (T) may be used instead of the Anomaly at epoch (v) Inclination (i) A satellite will always travel around the centre of the body it is orbiting and therefore it will always cross the equator twice in every orbit, unless, of course, it orbits directly above the equator. It will cut it as it travels from the southern hemisphere to the northern and again when it crosses from the northern to the southern hemi- sphere. The angle it makes when it crosses the equator from the 303 304 It’s ONLY Rocket Science southern hemisphere to the northern hemisphere is called the inclination, and this defines the orientation of the orbit with respect to the equator. -
Analysis of Interstellar Dust Using Linear Polarization
AMERICAN JOURNAL OF SCIENTIFIC AND INDUSTRIAL RESEARCH © 2010, Science Huβ, http://www.scihub.org/AJSIR ISSN: 2153-649X doi:10.5251/ajsir.2010.1.2.180.189 Analysis of interstellar dust using linear polarization Ali Abdul Sattar Jaber AL – Edhari Department of Physics, College of Science, Al- Muthanna University, Iraq E-mail: [email protected] Tel: +964-7811238920 ABSTRACT This paper, presents the study and analysis of the optical properties of interstellar dust grains. Attempt is made to select a suitable model which defines the structure and composition of these grains, by studying the linear polarization features .We shall present the application of the Serkowski law fit of linear polarization models. In this work we shall present and analysis the data for linear polarization of 6 regions HD142250 , HD34078 , HD46202, HD48099, HD147889 and HD154445 . The hollow needle shape cylindrical bacteria can be fit with reasonable agreement to the normalized linear polarization data in infrared to visible region of the spectrum. Serkowski law fit is still the excellent representation of linear polarization of the star lights of all the regions. Keywords: ISM, Galaxy, Interstellar, matter – Polarization, Microbial Model INTRODUCTION is fixed unless polarization is caused by different Observation of differing physical conditions of materials in different directions (Clayton and Mathis, interstellar dust provides valuable information about 1988). the size, shape and composition of the grains. The The wavelength dependence of interstellar linear polarization was first recognized by Serkowski, et al first information concerning the nature of the (1975). They found that interstellar linear polarization interstellar dust grains came from observations of the can be fitted well by an empirical relation ,Figure(1), characteristics on polarization of star lights (Clayton which is now universally accepted and considered and Martin, 1985). -