Discovery of a substellar companion to the nearby debris disk host HR 2562
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- Univ. of California, San Diego, La Jolla, CA (United States)
- Univ. de Montreal, Montreal, QC (Canada)
- Univ. of California, Berkeley, CA (United States); Univ. Grenoble Alpes/CNRS, Grenoble (France)
- Space Telescope Science Institute, Baltimore, MD (United States)
- City Univ. of New York, Staten Island, NY (United States); City Univ. of New York, New York, NY (United States); American Museum of Natural History, New York, NY (United States)
- National Research Council of Canada Herzberg, Victoria, BC (Canada); Univ. of Victoria, Victoria, BC (Canada)
- SETI Institute, Mountain View, CA (United States); Stanford Univ., Stanford, CA (United States)
- Institute for Advanced Study, Princeton, NJ (United States)
- Univ. of California, Berkeley, CA (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Stanford Univ., Stanford, CA (United States)
- Univ. of Arizona, Tucson, AZ (United States)
- Subaru Telescope, Hilo, HI (United States)
- The Univ. of Western Ontario, London, ON (Canada)
- Univ. of Toronto, Toronto, ON (Canada)
- Univ. of Georgia, Athens, GA (United States)
- The Pennsylvania State Univ., University Park, PA (United States)
- Univ. of California, Los Angeles, CA (United States)
- Durham Univ., Durham (United Kingdom); Gemini Observatory, La Serena (Chile)
- Johns Hopkins Univ., Baltimore, MD (United States)
- European Southern Observatory, Santiago (Chile)
- Large Synoptic Survey Telescope, Tucson, AZ (United States)
- SETI Institute, Mountain View, CA (United States)
- NASA Ames Research Center (ARC), Moffett Field, CA (United States)
- The Univ. of Western Ontario, London, ON (Canada); Stony Brook Univ., Stony Brook, NY (United States)
- American Museum of Natural History, New York, NY (United States)
- Arizona State Univ., Tempe, AZ (United States)
- Gemini Observatory, La Serena (Chile)
- Cornell Univ., Ithaca, NY (United States)
- Univ. of Toledo, Toledo, OH (United States)
- California Inst. of Technology (CalTech), Pasadena, CA (United States)
- The Aerospace Corp., El Segundo, CA (United States)
Here, 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 ($$0\buildrel{\prime\prime}\over{.} 618\pm 0\buildrel{\prime\prime}\over{.} 004$$) 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 $${}_{\mathrm{bol}}$$/$${L}_{\odot })=-4.62\pm 0.12$$, corresponding to a mass of 30 ± 15 $${M}_{\mathrm{Jup}}$$ 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.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE; National Science Foundation (NSF); National Aeronautics and Space Administration (NASA)
- Grant/Contract Number:
- AC52-07NA27344; AST-1518332; AST-1411868; AST-141378; AST-1211568; DGE-1232825; AST-1313132; NNX15AD95G/NEXSS; NNX15AC89G; NNX14AJ80G
- OSTI ID:
- 1352117
- Report Number(s):
- LLNL-JRNL-717818
- Journal Information:
- The Astrophysical Journal. Letters (Online), Vol. 829, Issue 1; ISSN 2041-8213
- Publisher:
- Institute of Physics (IOP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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