Design of an Example Observing Program
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Arxiv:1207.6212V2 [Astro-Ph.GA] 1 Aug 2012
Draft: Submitted to ApJ Supp. A Preprint typeset using LTEX style emulateapj v. 5/2/11 PRECISE RADIAL VELOCITIES OF 2046 NEARBY FGKM STARS AND 131 STANDARDS1 Carly Chubak2, Geoffrey W. Marcy2, Debra A. Fischer5, Andrew W. Howard2,3, Howard Isaacson2, John Asher Johnson4, Jason T. Wright6,7 (Received; Accepted) Draft: Submitted to ApJ Supp. ABSTRACT We present radial velocities with an accuracy of 0.1 km s−1 for 2046 stars of spectral type F,G,K, and M, based on ∼29000 spectra taken with the Keck I telescope. We also present 131 FGKM standard stars, all of which exhibit constant radial velocity for at least 10 years, with an RMS less than 0.03 km s−1. All velocities are measured relative to the solar system barycenter. Spectra of the Sun and of asteroids pin the zero-point of our velocities, yielding a velocity accuracy of 0.01 km s−1for G2V stars. This velocity zero-point agrees within 0.01 km s−1 with the zero-points carefully determined by Nidever et al. (2002) and Latham et al. (2002). For reference we compute the differences in velocity zero-points between our velocities and standard stars of the IAU, the Harvard-Smithsonian Center for Astrophysics, and l’Observatoire de Geneve, finding agreement with all of them at the level of 0.1 km s−1. But our radial velocities (and those of all other groups) contain no corrections for convective blueshift or gravitational redshifts (except for G2V stars), leaving them vulnerable to systematic errors of ∼0.2 km s−1 for K dwarfs and ∼0.3 km s−1 for M dwarfs due to subphotospheric convection, for which we offer velocity corrections. -
A Resolved, Au-Scale Gas Disk Around the B\[E\] Star HD 50138 ⋆ ⋆⋆
UvA-DARE (Digital Academic Repository) A resolved, au-scale gas disk around the B[e] star HD 50138 Ellerbroek, L.E.; Benisty, M.; Kraus, S.; Perraut, K.; Kluska, J.; de Bouquin, J.B.; Borges Fernandes, M.; Domiciano de Souza, A.; Maaskant, K.M.; Kaper, L.; Tramper, F.; Mourard, D.; Tallon-Bosc, I.; ten Brummelaar, T.; Sitko, M.L.; Lynch, D.K.; Russell, R.W. DOI 10.1051/0004-6361/201424143 Publication date 2015 Document Version Final published version Published in Astronomy & Astrophysics Link to publication Citation for published version (APA): Ellerbroek, L. E., Benisty, M., Kraus, S., Perraut, K., Kluska, J., de Bouquin, J. B., Borges Fernandes, M., Domiciano de Souza, A., Maaskant, K. M., Kaper, L., Tramper, F., Mourard, D., Tallon-Bosc, I., ten Brummelaar, T., Sitko, M. L., Lynch, D. K., & Russell, R. W. (2015). A resolved, au-scale gas disk around the B[e] star HD 50138. Astronomy & Astrophysics, 573, A77. https://doi.org/10.1051/0004-6361/201424143 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. -
Star HD 50138?,??
A&A 573, A77 (2015) Astronomy DOI: 10.1051/0004-6361/201424143 & c ESO 2014 Astrophysics A resolved, au-scale gas disk around the B[e] star HD 50138?;?? L. E. Ellerbroek1, M. Benisty2;3, S. Kraus4, K. Perraut2;3, J. Kluska2;3, J. B. le Bouquin2;3, M. Borges Fernandes5, A. Domiciano de Souza6, K. M. Maaskant7;1, L. Kaper1, F. Tramper1, D. Mourard6, I. Tallon-Bosc8;9;10, T. ten Brummelaar11, M. L. Sitko12;13;???, D. K. Lynch14;15;???, and R. W. Russell14;??? 1 Anton Pannekoek Institute, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands e-mail: [email protected] 2 Université Grenoble Alpes, IPAG, 38000 Grenoble, France 3 CNRS, IPAG, 38000 Grenoble, France 4 School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL, UK 5 Observatório Nacional, Rua General José Cristino 77, 20921-400 São Cristovão, Rio de Janeiro, Brazil 6 Laboratoire Lagrange, UMR 7293 UNS-CNRS-OCA, Boulevard de l’Observatoire, CS 34229, 06304 Nice Cedex 4, France 7 Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, The Netherlands 8 Université de Lyon, 69003 Lyon, France 9 Université Lyon 1, Observatoire de Lyon, 9 avenue Charles André, 69230 Saint Genis Laval 10 CNRS, UMR 5574, Centre de Recherche Astrophysique de Lyon; École Normale Supérieure, 69007 Lyon, France 11 The CHARA Array of Georgia State University, Mount Wilson Observatory, 91023 Mount Wilson CA, USA 12 Department of Physics, University of Cincinnati, Cincinnati OH 45221, USA 13 Space Science Institute, 4750 Walnut Street, Boulder, CO 80303, USA 14 The Aerospace Corporation, Los Angeles, CA 90009, USA 15 Thule Scientific, Topanga, CA 90290, USA Received 6 May 2014 / Accepted 17 September 2014 ABSTRACT HD 50138 is a B[e] star surrounded by a large amount of circumstellar gas and dust. -
Vanzi Et Al., 2012, MNRAS, 424, 2770
Mon. Not. R. Astron. Soc. 424, 2770–2777 (2012) doi:10.1111/j.1365-2966.2012.21382.x PUCHEROS: a cost-effective solution for high-resolution spectroscopy with small telescopes L. Vanzi,1 J. Chacon,1 K. G. Helminiak,2 M. Baffico,2 T. Rivinius,3 S. Stefl,ˇ 3 D. Baade,4 G. Avila4 and C. Guirao4 1Department of Electrical Engineering and Center of Astro Engineering, Pontificia Universidad Catolica de Chile, Av. Vicuna˜ Mackenna 4860, Santiago, Chile 2Department of Astronomy and Astrophysics, Pontificia Universidad Catolica de Chile, Av. Vicuna˜ Mackenna 4860, Santiago, Chile 3ESO-European Organisation for Astronomical Research in the Southern Hemisphere, Casilla 19001, Santiago 19, Chile 4 ESO-European Organisation for Astronomical Research in the Southern Hemisphere, Karl-Schwarzschild-Str. 2, 85748 Garching bei Munchen,¨ Germany Downloaded from Accepted 2012 May 23. Received 2012 May 18; in original form 2012 May 3 http://mnras.oxfordjournals.org/ ABSTRACT We present PUCHEROS, the high-resolution echelle spectrograph, developed at the Center of Astro-Engineering of Pontificia Universidad Catolica de Chile to provide an effective tool for research and teaching of astronomy. The instrument is fed by a single-channel optical fibre and it covers the visible range from 390 to 730 nm in one shot, reaching a spectral resolution of about 20 000. In the era of extremely large telescopes our instrument aims to exploit the capabilities offered by small telescopes in a cost-effective way, covering the observing needs of a community of astronomers, in Chile and elsewhere, which do not necessarily need large collecting areas for their research.