2017AJ....153..131N

Query : 2017AJ....153..131N

2017AJ....153..131N - Astron. J., 153, 131-131 (2017/March-0)

EPIC 219388192b-an inhabitant of the brown dwarf desert in the Ruprecht 147 open cluster.

NOWAK G., PALLE E., GANDOLFI D., DAI F., LANZA A.F., HIRANO T., BARRAGAN O., FUKUI A., BRUNTT H., ENDL M., COCHRAN W.D., PRADA MORONI P.G., PRIETO-ARRANZ J., KIILERICH A., NESPRAL D., HATZES A.P., ALBRECHT S., DEEG H., WINN J.N., YU L., KUZUHARA M., GRZIWA S., SMITH A.M.S., GUENTHER E.W., VAN EYLEN V., CSIZMADIA S., FRIDLUND M., CABRERA J., EIGMULLER P., ERIKSON A., KORTH J., NARITA N., PATZOLD M., RAUER H. and RIBAS I.

Abstract (from CDS):

We report the discovery of EPIC 219388192b, a transiting brown dwarf in a 5.3 day orbit around a member star of Ruprecht 147, the oldest nearby open cluster association, which was photometrically monitored by K2 during its Campaign 7. We combine the K2 time-series data with ground-based adaptive optics imaging and high-resolution spectroscopy to rule out false positive scenarios and determine the main parameters of the system. EPIC 219388192b has a radius of Rb=0.937±0.032RJup and mass of Mb=36.84±0.97MJup, yielding a mean density of 59.6±7.6g cm–3. The host star is nearly a solar twin with mass M*=1.01±0.04M☉, radius R*=1.01±0.03R☉, effective temperature Teff = 5850 ± 85 K, and iron abundance [Fe/H] = 0.03 ± 0.08 dex. Its age, spectroscopic distance, and reddening are consistent with those of Ruprecht 147, corroborating its cluster membership. EPIC 219388192b is the first mature brown dwarf with precise determinations of mass, radius, and age, and serves as benchmark for evolutionary models in the substellar regime.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): brown dwarfs - stars: individual: EPIC 219388192 - techniques: photometric - techniques: radial velocities - techniques: spectroscopic - techniques: spectroscopic

Simbad objects: 9

goto Full paper

goto View the references in ADS

Number of rows : 9
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* V2384 Ori Or* 05 35 21.8473218600 -05 46 08.571352260       19.21 17.28 M7 109 1
2 * 37 Gem * 06 55 18.6663587832 +25 22 32.503553004   6.343 5.748     G0V 246 0
3 EPIC 201702477.01 Pl? 11 40 57.7883247720 +03 40 53.646749112           ~ 19 0
4 2MASS J16171898-2437186 Or* 16 17 18.9828853440 -24 37 18.739448040           M5V 25 0
5 NGC 6774 OpC 19 16 17.6 -16 20 45           ~ 258 0
6 EPIC 219388192 b BD? 19 17 34.0 -16 52 17           ~ 33 0
7 UCAC4 366-166973 * 19 17 34.0314284136 -16 52 17.793243804   13.28 12.54 12.39   ~ 49 0
8 HD 182488 PM* 19 23 34.0131683760 +33 13 19.078425912       5.8   K0V 306 1
9 Kepler-492b Pl 19 41 59.1967605000 +42 32 16.400455944           ~ 46 0

To bookmark this query, right click on this link: simbad:objects in 2017AJ....153..131N and select 'bookmark this link' or equivalent in the popup menu