DISCOVERY of A SUBSTELLAR COMPANION to the NEARBY DEBRIS DISK HOST HR 2562

Quinn M. Konopacky, Julien Rameau, Gaspard Duchêne, Joseph C. Filippazzo, Paige A Giorla Godfrey, Christian Marois, Eric L. Nielsen, Laurent Pueyo, Roman R. Rafikov, Emily L. Rice, Jason J. Wang, S. Mark Ammons, Vanessa P. Bailey, Travis S. Barman, Joanna Bulger, Sebastian Bruzzone, Jeffrey K. Chilcote, Tara Cotten, Rebekah I. Dawson, Robert J De RosaRené Doyon, Thomas M. Esposito, Michael P. Fitzgerald, Katherine B. Follette, Stephen Goodsell, James R. Graham, Alexandra Z. Greenbaum, Pascale Hibon, Li Wei Hung, Patrick Ingraham, Paul Kalas, David Lafrenière, James E. Larkin, Bruce A. Macintosh, Jérôme Maire, Franck Marchis, Mark S. Marley, Brenda C. Matthews, Stanimir Metchev, Maxwell A. Millar-Blanchaer, Rebecca Oppenheimer, David W. Palmer, Jennifer Patience, Marshall D. Perrin, Lisa A. Poyneer, Abhijith Rajan, Fredrik T. Rantakyrö, Dmitry Savransky, Adam C. Schneider, Anand Sivaramakrishnan, Inseok Song, Remi Soummer, Sandrine Thomas, J. Kent Wallace, Kimberly Ward-Duong, Sloane J. Wiktorowicz, Schuyler G. Wolff

Research output: Contribution to journalArticle

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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.″618 ± 0. ″004) from the star. With the high astrometric precision afforded by GPI, we have confirmed, to more than 5?, 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 2562Band derive a luminosity of log(Lbol/L) = -4.62 ± 0.12, corresponding to a mass of 30 ± 15 MJup 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.

Original languageEnglish (US)
Article numberL4
JournalAstrophysical Journal Letters
Volume829
Issue number1
DOIs
StatePublished - Sep 20 2016

Keywords

  • brown dwarfs
  • instrumentation: adaptive optics
  • planet-disk interactions
  • stars: individual (HR 2562)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Konopacky, Q. M., Rameau, J., Duchêne, G., Filippazzo, J. C., Godfrey, P. A. G., Marois, C., Nielsen, E. L., Pueyo, L., Rafikov, R. R., Rice, E. L., Wang, J. J., Ammons, S. M., Bailey, V. P., Barman, T. S., Bulger, J., Bruzzone, S., Chilcote, J. K., Cotten, T., Dawson, R. I., ... Wolff, S. G. (2016). DISCOVERY of A SUBSTELLAR COMPANION to the NEARBY DEBRIS DISK HOST HR 2562. Astrophysical Journal Letters, 829(1), [L4]. https://doi.org/10.3847/2041-8205/829/1/L4