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Title:
Discovery of a Substellar Companion to the Nearby Debris Disk Host HR 2562
Authors:
Konopacky, Quinn M.; Rameau, Julien; Duchêne, Gaspard; Filippazzo, Joseph C.; Giorla Godfrey, Paige A.; Marois, Christian; Nielsen, Eric L.; Pueyo, Laurent; Rafikov, Roman R.; Rice, Emily L.; Wang, Jason J.; Ammons, S. Mark; Bailey, Vanessa P.; Barman, Travis S.; Bulger, Joanna; Bruzzone, Sebastian; Chilcote, Jeffrey K.; Cotten, Tara; Dawson, Rebekah I.; De Rosa, Robert J.; Doyon, René; Esposito, Thomas M.; Fitzgerald, Michael P.; Follette, Katherine B.; Goodsell, Stephen; Graham, James R.; Greenbaum, Alexandra Z.; Hibon, Pascale; Hung, Li-Wei; Ingraham, Patrick; Kalas, Paul; Lafrenière, David; Larkin, James E.; Macintosh, Bruce A.; Maire, Jérôme; Marchis, Franck; Marley, Mark S.; Matthews, Brenda C.; Metchev, Stanimir; Millar-Blanchaer, Maxwell A.; Oppenheimer, Rebecca; Palmer, David W.; Patience, Jenny; Perrin, Marshall D.; Poyneer, Lisa A.; Rajan, Abhijith; Rantakyrö, Fredrik T.; Savransky, Dmitry; Schneider, Adam C.; Sivaramakrishnan, Anand; Song, Inseok; Soummer, Remi; Thomas, Sandrine; Wallace, J. Kent; Ward-Duong, Kimberly; Wiktorowicz, Sloane J.; Wolff, Schuyler G.
Affiliation:
AA(Center for Astrophysics and Space Sciences, University of California, San Diego, La Jolla, CA 92093, USA 0000-0002-9936-6285), AB(Institut de Recherche sur les Exoplanètes, Département de physique, Université de Montréal, Montréal, QC H3C 3J7, Canada), AC(Astronomy Department, University of California, Berkeley, Berkeley, CA 94720, USA ; Univ. Grenoble Alpes/CNRS, IPAG, F-38000 Grenoble, France 0000-0002-5092-6464), AD(Space Telescope Science Institute, Baltimore, MD 21218, USA 0000-0002-0201-8306), AE(Department of Engineering Science and Physics, College of Staten Island, City University of New York, Staten Island, NY 10314, USA ; Physics Program, The Graduate Center, City University of New York, New York, NY 10016, USA ; Department of Astrophysics, American Museum of Natural History, New York, NY 10024, USA), AF(National Research Council of Canada Herzberg, Victoria, BC V9E 2E7, Canada ; University of Victoria, Department of Physics and Astronomy, 3800 Finnerty Road, Victoria, BC V8P 5C2, Canada 0000-0002-4164-4182), AG(SETI Institute, Carl Sagan Center, Mountain View, CA 94043, USA ; Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics, Stanford University, Stanford, CA 94305, USA), AH(Space Telescope Science Institute, Baltimore, MD 21218, USA), AI(Institute for Advanced Study, Princeton, NJ 08540, USA 0000-0002-0012-1609), AJ(Department of Engineering Science and Physics, College of Staten Island, City University of New York, Staten Island, NY 10314, USA ; Physics Program, The Graduate Center, City University of New York, New York, NY 10016, USA ; Department of Astrophysics, American Museum of Natural History, New York, NY 10024, USA 0000-0002-3252-5886), AK(Astronomy Department, University of California, Berkeley, Berkeley, CA 94720, USA 0000-0003-0774-6502), AL(Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA, 94550, USA 0000-0001-5172-7902), AM(Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics, Stanford University, Stanford, CA 94305, USA), AN(Lunar and Planetary Lab, University of Arizona, Tucson, AZ 85721, USA), AO(Subaru Telescope, NAOJ, 650 North Aohoku Place, Hilo, HI 96720, USA), AP(Department of Physics and Astronomy, Centre for Planetary Science and Exploration, The University of Western Ontario, London, ON N6A 3K7, Canada), AQ(Dunlap Institute for Astronomy & Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON, Canada), AR(Department of Physics and Astronomy, University of Georgia, Athens, GA 30602, USA 0000-0003-0156-3019), AS(Center for Exoplanets and Habitable Worlds, The Pennsylvania State University, 525 Davey Laboratory, University Park, PA, 16802, USA 0000-0001-9677-1296), AT(Astronomy Department, University of California, Berkeley, Berkeley, CA 94720, USA 0000-0002-4918-0247), AU(Institut de Recherche sur les Exoplanètes, Département de physique, Université de Montréal, Montréal, QC H3C 3J7, Canada), AV(Astronomy Department, University of California, Berkeley, Berkeley, CA 94720, USA 0000-0002-0792-3719), AW(Department of Physics & Astronomy, University of California, Los Angeles, CA 90095, USA 0000-0002-0176-8973), AX(Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics, Stanford University, Stanford, CA 94305, USA), AY(Department of Physics, Durham University, Stockton Road, Durham DH1, UK ; Gemini Observatory, Casilla 603, La Serena, Chile 0000-0002-4144-5116), AZ(Astronomy Department, University of California, Berkeley, Berkeley, CA 94720, USA), BA(Department of Physics & Astronomy, Johns Hopkins University, Baltimore MD 21218, USA), BB(European Southern Observatory, Alonso de Cordova 3107, Vitacura, Santiago, Chile), BC(Department of Physics & Astronomy, University of California, Los Angeles, CA 90095, USA), BD(Large Synoptic Survey Telescope, 950 N Cherry Avenue, Tucson AZ, 85719, USA), BE(Astronomy Department, University of California, Berkeley, Berkeley, CA 94720, USA), BF(Institut de Recherche sur les Exoplanètes, Département de physique, Université de Montréal, Montréal, QC H3C 3J7, Canada), BG(Department of Physics & Astronomy, University of California, Los Angeles, CA 90095, USA), BH(Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics, Stanford University, Stanford, CA 94305, USA), BI(Dunlap Institute for Astronomy & Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON, Canada), BJ(SETI Institute, Carl Sagan Center, Mountain View, CA 94043, USA 0000-0001-7016-7277), BK(Space Science Division, NASA Ames Research Center, Mail Stop 245-3, Moffett Field CA 94035, USA 0000-0002-5251-2943), BL(National Research Council of Canada Herzberg, Victoria, BC V9E 2E7, Canada ; University of Victoria, Department of Physics and Astronomy, 3800 Finnerty Road, Victoria, BC V8P 5C2, Canada 0000-0003-3017-9577), BM(Department of Physics and Astronomy, Centre for Planetary Science and Exploration, The University of Western Ontario, London, ON N6A 3K7, Canada; Department of Physics & Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA 0000-0003-3050-8203), BN(Dunlap Institute for Astronomy & Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON, Canada; Department of Astronomy & Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON, Canada 0000-0001-6205-9233), BO(Department of Astrophysics, American Museum of Natural History, New York, NY 10024, USA 0000-0001-7130-7681), BP(Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA, 94550, USA), BQ(School of Earth and Space Exploration, Arizona State University, P.O. Box 871404, Tempe, AZ 85287, USA 0000-0001-9004-803X), BR(Space Telescope Science Institute, Baltimore, MD 21218, USA 0000-0002-3191-8151), BS(Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA, 94550, USA), BT(School of Earth and Space Exploration, Arizona State University, P.O. Box 871404, Tempe, AZ 85287, USA 0000-0002-9246-5467), BU(Gemini Observatory, Casilla 603, La Serena, Chile 0000-0002-9667-2244), BV(Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853, USA 0000-0002-8711-7206), BW(Department of Physics & Astronomy, University of Toledo, 2801 W. Bancroft Street, Toledo, OH 43606, USA), BX(Space Telescope Science Institute, Baltimore, MD 21218, USA 0000-0003-1251-4124), BY(Department of Physics and Astronomy, University of Georgia, Athens, GA 30602, USA 0000-0002-5815-7372), BZ(Space Telescope Science Institute, Baltimore, MD 21218, USA 0000-0003-2753-2819), CA(Large Synoptic Survey Telescope, 950 N Cherry Avenue, Tucson AZ, 85719, USA), CB(Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA), CC(School of Earth and Space Exploration, Arizona State University, P.O. Box 871404, Tempe, AZ 85287, USA 0000-0002-4479-8291), CD(The Aerospace Corporation, 2310 E. El Segundo Boulevard, El Segundo, CA 90245,USA), CE(Department of Physics & Astronomy, Johns Hopkins University, Baltimore MD 21218, USA)
Publication:
The Astrophysical Journal Letters, Volume 829, Issue 1, article id. L4, 7 pp. (2016). (ApJL Homepage)
Publication Date:
09/2016
Origin:
IOP
Astronomy Keywords:
brown dwarfs, instrumentation: adaptive optics, planet–disk interactions, stars: individual: HR 2562
DOI:
10.3847/2041-8205/829/1/L4
Bibliographic Code:
2016ApJ...829L...4K

Abstract

We present the discovery of a brown dwarf companion to the debris disk host star HR 2562. This object, discovered with the Gemini Planet Imager (GPI), has a projected separation of 20.3 ± 0.3 au (0\buildrel{\prime\prime}\over{.} 618+/- 0\buildrel{\prime\prime}\over{.} 004) from the star. With the high astrometric precision afforded by GPI, we have confirmed, to more than 5σ, the common proper motion of HR 2562B with the star, with only a month-long time baseline between observations. Spectral data in the J-, H-, and K-bands show a morphological similarity to L/T transition objects. We assign a spectral type of L7 ± 3 to HR 2562B and derive a luminosity of log(L {}{bol}/{L})=-4.62+/- 0.12, corresponding to a mass of 30 ± 15 {M}{Jup} from evolutionary models at an estimated age of the system of 300-900 Myr. Although the uncertainty in the age of the host star is significant, the spectra and photometry exhibit several indications of youth for HR 2562B. The source has a position angle that is consistent with an orbit in the same plane as the debris disk recently resolved with Herschel. Additionally, it appears to be interior to the debris disk. Though the extent of the inner hole is currently too uncertain to place limits on the mass of HR 2562B, future observations of the disk with higher spatial resolution may be able to provide mass constraints. This is the first brown-dwarf-mass object found to reside in the inner hole of a debris disk, offering the opportunity to search for evidence of formation above the deuterium burning limit in a circumstellar disk.
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