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Title: DISCOVERY OF A LOW-MASS COMPANION AROUND HR 3549

Abstract

We report the discovery of a low-mass companion to HR 3549, an A0V star surrounded by a debris disk with a warm excess detected by WISE at 22 μm (10σ significance). We imaged HR 3549 B in the L band with NAOS-CONICA, the adaptive optics infrared camera of the Very Large Telescope, in January 2013 and confirmed its common proper motion in 2015 January. The companion is at a projected separation of ≃80 AU and position angle of ≃157°, so it is orbiting well beyond the warm disk inner edge of r > 10 AU. Our age estimate for this system corresponds to a companion mass in the range 15–80 M{sub J}, spanning the brown dwarf regime, and so HR 3549 B is another recent addition to the growing list of brown dwarf desert objects with extreme mass ratios. The simultaneous presence of a warm disk and a brown dwarf around HR 3549 provides interesting empirical constraints on models of the formation of substellar companions.

Authors:
; ;  [1];  [2]; ;  [3]; ; ; ;  [4]
  1. Department of Astronomy, California Institute of Technology, 1200 E. California Boulevard, MC 249-17, Pasadena, CA 91125 (United States)
  2. Department of Physics and Astronomy, University of Exeter, Physics Building, Stocker Road, Exeter EX4 4QL (United Kingdom)
  3. NASA Goddard Space Flight Center, 8800 Greenbelt Road, Greenbelt, MD 20771 (United States)
  4. Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 (United States)
Publication Date:
OSTI Identifier:
22525339
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 811; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CAMERAS; DWARF STARS; IMAGES; INFRARED RADIATION; LIMITING VALUES; MASS; OPTICS; PROPER MOTION; RESOLUTION; STAR EVOLUTION; TELESCOPES

Citation Formats

Mawet, D., David, T., Bottom, M., Hinkley, S., Stapelfeldt, K., Padgett, D., Mennesson, B., Serabyn, E., Morales, F., and Kuhn, J., E-mail: dmawet@astro.caltech.edu. DISCOVERY OF A LOW-MASS COMPANION AROUND HR 3549. United States: N. p., 2015. Web. doi:10.1088/0004-637X/811/2/103.
Mawet, D., David, T., Bottom, M., Hinkley, S., Stapelfeldt, K., Padgett, D., Mennesson, B., Serabyn, E., Morales, F., & Kuhn, J., E-mail: dmawet@astro.caltech.edu. DISCOVERY OF A LOW-MASS COMPANION AROUND HR 3549. United States. doi:10.1088/0004-637X/811/2/103.
Mawet, D., David, T., Bottom, M., Hinkley, S., Stapelfeldt, K., Padgett, D., Mennesson, B., Serabyn, E., Morales, F., and Kuhn, J., E-mail: dmawet@astro.caltech.edu. Thu . "DISCOVERY OF A LOW-MASS COMPANION AROUND HR 3549". United States. doi:10.1088/0004-637X/811/2/103.
@article{osti_22525339,
title = {DISCOVERY OF A LOW-MASS COMPANION AROUND HR 3549},
author = {Mawet, D. and David, T. and Bottom, M. and Hinkley, S. and Stapelfeldt, K. and Padgett, D. and Mennesson, B. and Serabyn, E. and Morales, F. and Kuhn, J., E-mail: dmawet@astro.caltech.edu},
abstractNote = {We report the discovery of a low-mass companion to HR 3549, an A0V star surrounded by a debris disk with a warm excess detected by WISE at 22 μm (10σ significance). We imaged HR 3549 B in the L band with NAOS-CONICA, the adaptive optics infrared camera of the Very Large Telescope, in January 2013 and confirmed its common proper motion in 2015 January. The companion is at a projected separation of ≃80 AU and position angle of ≃157°, so it is orbiting well beyond the warm disk inner edge of r > 10 AU. Our age estimate for this system corresponds to a companion mass in the range 15–80 M{sub J}, spanning the brown dwarf regime, and so HR 3549 B is another recent addition to the growing list of brown dwarf desert objects with extreme mass ratios. The simultaneous presence of a warm disk and a brown dwarf around HR 3549 provides interesting empirical constraints on models of the formation of substellar companions.},
doi = {10.1088/0004-637X/811/2/103},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 811,
place = {United States},
year = {2015},
month = {10}
}