EPIC 219388192b - An Inhabitant of the Brown Dwarf Desert in the Ruprecht 147 Open Cluster

Grzegorz Nowak; Enric Palle; Davide Gandolfi; Fei Dai; Antonino F. Lanza; Teruyuki Hirano; Oscar Barragán; Akihiko Fukui; Hans Bruntt; Michael Endl; William D. Cochran; Pier G.Prada Moroni; Jorge Prieto-Arranz; Amanda Kiilerich; David Nespral; Artie P. Hatzes; Simon Albrecht; Hans Deeg; Joshua N. Winn; Liang Yu; Masayuki Kuzuhara; Sascha Grziwa; Alexis M.S. Smith; Eike W. Guenther; Vincent Van Eylen; Szilard Csizmadia; Malcolm Fridlund; Juan Cabrera; Philipp Eigmüller; Anders Erikson; Judith Korth; Norio Narita; Martin Pätzold; Heike Rauer; Ignasi Ribas

doi:10.3847/1538-3881/aa5cb6

EPIC 219388192b - An Inhabitant of the Brown Dwarf Desert in the Ruprecht 147 Open Cluster

Grzegorz Nowak, Enric Palle, Davide Gandolfi, Fei Dai, Antonino F. Lanza, Teruyuki Hirano, Oscar Barragán, Akihiko Fukui, Hans Bruntt, Michael Endl, William D. Cochran, Pier G.Prada Moroni, Jorge Prieto-Arranz, Amanda Kiilerich, David Nespral, Artie P. Hatzes, Simon Albrecht, Hans Deeg, Joshua N. Winn, Liang YuMasayuki Kuzuhara, Sascha Grziwa, Alexis M.S. Smith, Eike W. Guenther, Vincent Van Eylen, Szilard Csizmadia, Malcolm Fridlund, Juan Cabrera, Philipp Eigmüller, Anders Erikson, Judith Korth, Norio Narita, Martin Pätzold, Heike Rauer, Ignasi Ribas

Astrophysical Sciences

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39 Scopus citations

Abstract

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 R_b= 0.937 ± 0.032 R_Jup and mass of M_b = 36.84 ± 0.97 M_Jup , yielding a mean density of 59.6 ± 7.6 g cm^-3. The host star is nearly a solar twin with mass M = 1.01 ± 0.04 M_e, radius R = 1.01 ± 0.03 Re, effective temperature T_eff=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.

Original language	English (US)
Article number	131
Journal	Astronomical Journal
Volume	153
Issue number	3
DOIs	https://doi.org/10.3847/1538-3881/aa5cb6
State	Published - Mar 2017

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

brown dwarfs
stars: individual (EPIC 219388192)
techniques: photometric
techniques: radial velocities
techniques: spectroscopic

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10.3847/1538-3881/aa5cb6

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Nowak, G., Palle, E., Gandolfi, D., Dai, F., Lanza, A. F., Hirano, T., Barragán, O., Fukui, A., Bruntt, H., Endl, M., Cochran, W. D., Moroni, P. G. P., Prieto-Arranz, J., Kiilerich, A., Nespral, D., Hatzes, A. P., Albrecht, S., Deeg, H., Winn, J. N., ... Ribas, I. (2017). EPIC 219388192b - An Inhabitant of the Brown Dwarf Desert in the Ruprecht 147 Open Cluster. Astronomical Journal, 153(3), Article 131. https://doi.org/10.3847/1538-3881/aa5cb6

@article{76339eeecf9b4e2997d0930c606c0914,

title = "EPIC 219388192b - An Inhabitant of the Brown Dwarf Desert in the Ruprecht 147 Open Cluster",

abstract = "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 ± 0.032 RJup and mass of Mb = 36.84 ± 0.97 MJup , yielding a mean density of 59.6 ± 7.6 g cm-3. The host star is nearly a solar twin with mass M = 1.01 ± 0.04 Me, radius R = 1.01 ± 0.03 Re, 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.",

keywords = "brown dwarfs, stars: individual (EPIC 219388192), techniques: photometric, techniques: radial velocities, techniques: spectroscopic",

author = "Grzegorz Nowak and Enric Palle and Davide Gandolfi and Fei Dai and Lanza, {Antonino F.} and Teruyuki Hirano and Oscar Barrag{\'a}n and Akihiko Fukui and Hans Bruntt and Michael Endl and Cochran, {William D.} and Moroni, {Pier G.Prada} and Jorge Prieto-Arranz and Amanda Kiilerich and David Nespral and Hatzes, {Artie P.} and Simon Albrecht and Hans Deeg and Winn, {Joshua N.} and Liang Yu and Masayuki Kuzuhara and Sascha Grziwa and Smith, {Alexis M.S.} and Guenther, {Eike W.} and Eylen, {Vincent Van} and Szilard Csizmadia and Malcolm Fridlund and Juan Cabrera and Philipp Eigm{\"u}ller and Anders Erikson and Judith Korth and Norio Narita and Martin P{\"a}tzold and Heike Rauer and Ignasi Ribas",

note = "Publisher Copyright: {\textcopyright} 2017 Published by Elsevier B.V.",

year = "2017",

month = mar,

doi = "10.3847/1538-3881/aa5cb6",

language = "English (US)",

volume = "153",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "IOP Publishing Ltd.",

number = "3",

}

Nowak, G, Palle, E, Gandolfi, D, Dai, F, Lanza, AF, Hirano, T, Barragán, O, Fukui, A, Bruntt, H, Endl, M, Cochran, WD, Moroni, PGP, Prieto-Arranz, J, Kiilerich, A, Nespral, D, Hatzes, AP, Albrecht, S, Deeg, H, Winn, JN, Yu, L, Kuzuhara, M, Grziwa, S, Smith, AMS, Guenther, EW, Eylen, VV, Csizmadia, S, Fridlund, M, Cabrera, J, Eigmüller, P, Erikson, A, Korth, J, Narita, N, Pätzold, M, Rauer, H & Ribas, I 2017, 'EPIC 219388192b - An Inhabitant of the Brown Dwarf Desert in the Ruprecht 147 Open Cluster', Astronomical Journal, vol. 153, no. 3, 131. https://doi.org/10.3847/1538-3881/aa5cb6

TY - JOUR

T1 - EPIC 219388192b - An Inhabitant of the Brown Dwarf Desert in the Ruprecht 147 Open Cluster

AU - Nowak, Grzegorz

AU - Palle, Enric

AU - Gandolfi, Davide

AU - Dai, Fei

AU - Lanza, Antonino F.

AU - Hirano, Teruyuki

AU - Barragán, Oscar

AU - Fukui, Akihiko

AU - Bruntt, Hans

AU - Endl, Michael

AU - Cochran, William D.

AU - Moroni, Pier G.Prada

AU - Prieto-Arranz, Jorge

AU - Kiilerich, Amanda

AU - Nespral, David

AU - Hatzes, Artie P.

AU - Albrecht, Simon

AU - Deeg, Hans

AU - Winn, Joshua N.

AU - Yu, Liang

AU - Kuzuhara, Masayuki

AU - Grziwa, Sascha

AU - Smith, Alexis M.S.

AU - Guenther, Eike W.

AU - Eylen, Vincent Van

AU - Csizmadia, Szilard

AU - Fridlund, Malcolm

AU - Cabrera, Juan

AU - Eigmüller, Philipp

AU - Erikson, Anders

AU - Korth, Judith

AU - Narita, Norio

AU - Pätzold, Martin

AU - Rauer, Heike

AU - Ribas, Ignasi

PY - 2017/3

Y1 - 2017/3

N2 - 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 ± 0.032 RJup and mass of Mb = 36.84 ± 0.97 MJup , yielding a mean density of 59.6 ± 7.6 g cm-3. The host star is nearly a solar twin with mass M = 1.01 ± 0.04 Me, radius R = 1.01 ± 0.03 Re, 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.

AB - 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 ± 0.032 RJup and mass of Mb = 36.84 ± 0.97 MJup , yielding a mean density of 59.6 ± 7.6 g cm-3. The host star is nearly a solar twin with mass M = 1.01 ± 0.04 Me, radius R = 1.01 ± 0.03 Re, 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.

KW - brown dwarfs

KW - stars: individual (EPIC 219388192)

KW - techniques: photometric

KW - techniques: radial velocities

KW - techniques: spectroscopic

UR - http://www.scopus.com/inward/record.url?scp=85015213813&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85015213813&partnerID=8YFLogxK

U2 - 10.3847/1538-3881/aa5cb6

DO - 10.3847/1538-3881/aa5cb6

M3 - Article

AN - SCOPUS:85015213813

SN - 0004-6256

VL - 153

JO - Astronomical Journal

JF - Astronomical Journal

IS - 3

M1 - 131

ER -

EPIC 219388192b - An Inhabitant of the Brown Dwarf Desert in the Ruprecht 147 Open Cluster

Abstract

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Keywords

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