2016ApJ...829L...4K


Query : 2016ApJ...829L...4K

2016ApJ...829L...4K - Astrophys. J., 829, L4-L4 (2016/September-3)

Discovery of a substellar companion to the nearby debris disk host HR 2562.

KONOPACKY Q.M., RAMEAU J., DUCHENE G., FILIPPAZZO J.C., GIORLA GODFREY P.A., 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., DE ROSA R.J., DOYON R., ESPOSITO T.M., FITZGERALD M.P., FOLLETTE K.B., GOODSELL S., GRAHAM J.R., GREENBAUM A.Z., HIBON P., HUNG L.-W., INGRAHAM P., KALAS P., LAFRENIERE D., LARKIN J.E., MACINTOSH B.A., MAIRE J., MARCHIS F., MARLEY M.S., MATTHEWS B.C., METCHEV S., MILLAR-BLANCHAER M.A., OPPENHEIMER R., PALMER D.W., PATIENCE J., PERRIN M.D., POYNEER L.A., RAJAN A., RANTAKYRO F.T., SAVRANSKY D., SCHNEIDER A.C., SIVARAMAKRISHNAN A., SONG I., SOUMMER R., THOMAS S., WALLACE J.K., WARD-DUONG K., WIKTOROWICZ S.J. and WOLFF S.G.

Abstract (from CDS):

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 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(Lbol/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.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

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

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 HD 50571B BD* 06 50 00.93 -60 14 56.7           L4-10 26 0
2 HD 50571 PM* 06 50 01.0151260800 -60 14 56.921260776   6.548 6.098 7.26   F5VFe+0.4 85 0
3 SIPS J1256-1257B BD* 12 56 01.83264 -12 57 27.6912           L7 80 0
4 2MASS J17410280-4642218 BD* 17 41 02.80656 -46 42 21.8520           L5:gamma 23 0
5 2MASS J21140802-2251358 BD* 21 14 08.02560 -22 51 35.8380           L7.5 108 0
6 NAME Pleiades Moving Group MGr ~ ~           ~ 277 1

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