HIP 33609 b: An Eccentric Brown Dwarf Transiting a V = 7.3 Rapidly Rotating B Star

Noah Vowell; Joseph E. Rodriguez; Samuel N. Quinn; George Zhou; Andrew Vanderburg; Andrew W. Mann; Matthew J. Hooton; Keivan G. Stassun; Saburo Howard; Allyson Bieryla; David W. Latham; Steve B. Howell; Tristan Guillot; Carl Ziegler; Karen A. Collins; Theron W. Carmichael; Jon M. Jenkins; Avi Shporer; Lyu ABE; Philippe Bendjoya; Jonathan L. Bush; Marco Buttu; Kevin I. Collins; Jason D. Eastman; Matthew J. Fields; Thomas Gasparetto; Maximilian N. Günther; Veselin B. Kostov; Adam L. Kraus; Kathryn V. Lester; Alan M. Levine; Colin Littlefield; Wenceslas Marie-Sainte; Djamel Mékarnia; Hugh P. Osborn; David Rapetti; George R. Ricker; S. Seager; Ramotholo Sefako; Gregor Srdoc; Olga Suarez; Guillermo Torres; Amaury H. M. J. Triaud; R. Vanderspek; Joshua N. Winn

doi:10.3847/1538-3881/acd197

HIP 33609 b: An Eccentric Brown Dwarf Transiting a V = 7.3 Rapidly Rotating B Star

Noah Vowell, Joseph E. Rodriguez, Samuel N. Quinn, George Zhou, Andrew Vanderburg, Andrew W. Mann, Matthew J. Hooton, Keivan G. Stassun, Saburo Howard, Allyson Bieryla, David W. Latham, Steve B. Howell, Tristan Guillot, Carl Ziegler, Karen A. Collins, Theron W. Carmichael, Jon M. Jenkins, Avi Shporer, Lyu ABE, Philippe BendjoyaJonathan L. Bush, Marco Buttu, Kevin I. Collins, Jason D. Eastman, Matthew J. Fields, Thomas Gasparetto, Maximilian N. Günther, Veselin B. Kostov, Adam L. Kraus, Kathryn V. Lester, Alan M. Levine, Colin Littlefield, Wenceslas Marie-Sainte, Djamel Mékarnia, Hugh P. Osborn, David Rapetti, George R. Ricker, S. Seager, Ramotholo Sefako, Gregor Srdoc, Olga Suarez, Guillermo Torres, Amaury H. M. J. Triaud, R. Vanderspek, Joshua N. Winn

Physics and Astronomy

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Abstract

We present the discovery and characterization of HIP 33609 b, a transiting warm brown dwarf orbiting a late B star, discovered by NASA's Transiting Exoplanet Survey Satellite as TOI-588 b. HIP 33609 b is a large (R b = 1.580−0.070+0.074 R J) brown dwarf on a highly eccentric (e = 0.560−0.031+0.029 ) orbit with a 39 days period. The host star is a bright (V = 7.3 mag), T eff = 10,400 −660+800 K star with a mass of M * = 2.383−0.095+0.10 M ⊙ and radius of R * = 1.863−0.082+0.087 R ⊙, making it the hottest transiting brown dwarf host star discovered to date. We obtained radial velocity measurements from the CHIRON spectrograph confirming the companion's mass of M b = 68.0−7.1+7.4 M J as well as the host star's rotation rate ( vsini*=55.6±1.8 km s−1). We also present the discovery of a new comoving group of stars, designated as MELANGE-6, and determine that HIP 33609 is a member. We use a combination of rotation periods and isochrone models fit to the cluster members to estimate an age of 150 ± 25 Myr. With a measured mass, radius, and age, HIP 33609 b becomes a benchmark for substellar evolutionary models.

Original language	English
Article number	268
Journal	The Astronomical Journal
Volume	165
Issue number	6
DOIs	https://doi.org/10.3847/1538-3881/acd197 https://doi.org/10.3847/1538-3881/acd197
Publication status	Published - 5 Jun 2023

Bibliographical note

16 pages, 5 figures, 4 tables, Submitted to AAS Journals

Keywords

Direct imaging
Exoplanets
Young star clusters
Exoplanet evolution
Brown dwarfs
CCD photometry
High resolution spectroscopy

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2301.09663v1Accepted author manuscript, 2.37 MB
VowellN2023HIP33609Final published version, 16.5 MBLicence: Creative Commons: Attribution (CC BY)

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Vowell, N., Rodriguez, J. E., Quinn, S. N., Zhou, G., Vanderburg, A., Mann, A. W., Hooton, M. J., Stassun, K. G., Howard, S., Bieryla, A., Latham, D. W., Howell, S. B., Guillot, T., Ziegler, C., Collins, K. A., Carmichael, T. W., Jenkins, J. M., Shporer, A., ABE, L., ... Winn, J. N. (2023). HIP 33609 b: An Eccentric Brown Dwarf Transiting a V = 7.3 Rapidly Rotating B Star. The Astronomical Journal, 165(6), Article 268. https://doi.org/10.3847/1538-3881/acd197, https://doi.org/10.3847/1538-3881/acd197

@article{4b92297240b34b02836386641e330da0,

title = "HIP 33609 b: An Eccentric Brown Dwarf Transiting a V = 7.3 Rapidly Rotating B Star",

abstract = "We present the discovery and characterization of HIP 33609 b, a transiting warm brown dwarf orbiting a late B star, discovered by NASA's Transiting Exoplanet Survey Satellite as TOI-588 b. HIP 33609 b is a large (R b = 1.580−0.070+0.074 R J) brown dwarf on a highly eccentric (e = 0.560−0.031+0.029 ) orbit with a 39 days period. The host star is a bright (V = 7.3 mag), T eff = 10,400 −660+800 K star with a mass of M * = 2.383−0.095+0.10 M ⊙ and radius of R * = 1.863−0.082+0.087 R ⊙, making it the hottest transiting brown dwarf host star discovered to date. We obtained radial velocity measurements from the CHIRON spectrograph confirming the companion's mass of M b = 68.0−7.1+7.4 M J as well as the host star's rotation rate ( vsini*=55.6±1.8 km s−1). We also present the discovery of a new comoving group of stars, designated as MELANGE-6, and determine that HIP 33609 is a member. We use a combination of rotation periods and isochrone models fit to the cluster members to estimate an age of 150 ± 25 Myr. With a measured mass, radius, and age, HIP 33609 b becomes a benchmark for substellar evolutionary models.",

keywords = "Direct imaging, Exoplanets, Young star clusters, Exoplanet evolution, Brown dwarfs, CCD photometry, High resolution spectroscopy",

author = "Noah Vowell and Rodriguez, {Joseph E.} and Quinn, {Samuel N.} and George Zhou and Andrew Vanderburg and Mann, {Andrew W.} and Hooton, {Matthew J.} and Stassun, {Keivan G.} and Saburo Howard and Allyson Bieryla and Latham, {David W.} and Howell, {Steve B.} and Tristan Guillot and Carl Ziegler and Collins, {Karen A.} and Carmichael, {Theron W.} and Jenkins, {Jon M.} and Avi Shporer and Lyu ABE and Philippe Bendjoya and Bush, {Jonathan L.} and Marco Buttu and Collins, {Kevin I.} and Eastman, {Jason D.} and Fields, {Matthew J.} and Thomas Gasparetto and G{\"u}nther, {Maximilian N.} and Kostov, {Veselin B.} and Kraus, {Adam L.} and Lester, {Kathryn V.} and Levine, {Alan M.} and Colin Littlefield and Wenceslas Marie-Sainte and Djamel M{\'e}karnia and Osborn, {Hugh P.} and David Rapetti and Ricker, {George R.} and S. Seager and Ramotholo Sefako and Gregor Srdoc and Olga Suarez and Guillermo Torres and Triaud, {Amaury H. M. J.} and R. Vanderspek and Winn, {Joshua N.}",

note = "16 pages, 5 figures, 4 tables, Submitted to AAS Journals",

year = "2023",

month = jun,

day = "5",

doi = "10.3847/1538-3881/acd197",

language = "English",

volume = "165",

journal = "The Astronomical Journal",

issn = "0004-6256",

publisher = "American Astronomical Society",

number = "6",

}

Vowell, N, Rodriguez, JE, Quinn, SN, Zhou, G, Vanderburg, A, Mann, AW, Hooton, MJ, Stassun, KG, Howard, S, Bieryla, A, Latham, DW, Howell, SB, Guillot, T, Ziegler, C, Collins, KA, Carmichael, TW, Jenkins, JM, Shporer, A, ABE, L, Bendjoya, P, Bush, JL, Buttu, M, Collins, KI, Eastman, JD, Fields, MJ, Gasparetto, T, Günther, MN, Kostov, VB, Kraus, AL, Lester, KV, Levine, AM, Littlefield, C, Marie-Sainte, W, Mékarnia, D, Osborn, HP, Rapetti, D, Ricker, GR, Seager, S, Sefako, R, Srdoc, G, Suarez, O, Torres, G, Triaud, AHMJ, Vanderspek, R & Winn, JN 2023, 'HIP 33609 b: An Eccentric Brown Dwarf Transiting a V = 7.3 Rapidly Rotating B Star', The Astronomical Journal, vol. 165, no. 6, 268. https://doi.org/10.3847/1538-3881/acd197, https://doi.org/10.3847/1538-3881/acd197

TY - JOUR

T1 - HIP 33609 b

T2 - An Eccentric Brown Dwarf Transiting a V = 7.3 Rapidly Rotating B Star

AU - Vowell, Noah

AU - Rodriguez, Joseph E.

AU - Quinn, Samuel N.

AU - Zhou, George

AU - Vanderburg, Andrew

AU - Mann, Andrew W.

AU - Hooton, Matthew J.

AU - Stassun, Keivan G.

AU - Howard, Saburo

AU - Bieryla, Allyson

AU - Latham, David W.

AU - Howell, Steve B.

AU - Guillot, Tristan

AU - Ziegler, Carl

AU - Collins, Karen A.

AU - Carmichael, Theron W.

AU - Jenkins, Jon M.

AU - Shporer, Avi

AU - ABE, Lyu

AU - Bendjoya, Philippe

AU - Bush, Jonathan L.

AU - Buttu, Marco

AU - Collins, Kevin I.

AU - Eastman, Jason D.

AU - Fields, Matthew J.

AU - Gasparetto, Thomas

AU - Günther, Maximilian N.

AU - Kostov, Veselin B.

AU - Kraus, Adam L.

AU - Lester, Kathryn V.

AU - Levine, Alan M.

AU - Littlefield, Colin

AU - Marie-Sainte, Wenceslas

AU - Mékarnia, Djamel

AU - Osborn, Hugh P.

AU - Rapetti, David

AU - Ricker, George R.

AU - Seager, S.

AU - Sefako, Ramotholo

AU - Srdoc, Gregor

AU - Suarez, Olga

AU - Torres, Guillermo

AU - Triaud, Amaury H. M. J.

AU - Vanderspek, R.

AU - Winn, Joshua N.

N1 - 16 pages, 5 figures, 4 tables, Submitted to AAS Journals

PY - 2023/6/5

Y1 - 2023/6/5

N2 - We present the discovery and characterization of HIP 33609 b, a transiting warm brown dwarf orbiting a late B star, discovered by NASA's Transiting Exoplanet Survey Satellite as TOI-588 b. HIP 33609 b is a large (R b = 1.580−0.070+0.074 R J) brown dwarf on a highly eccentric (e = 0.560−0.031+0.029 ) orbit with a 39 days period. The host star is a bright (V = 7.3 mag), T eff = 10,400 −660+800 K star with a mass of M * = 2.383−0.095+0.10 M ⊙ and radius of R * = 1.863−0.082+0.087 R ⊙, making it the hottest transiting brown dwarf host star discovered to date. We obtained radial velocity measurements from the CHIRON spectrograph confirming the companion's mass of M b = 68.0−7.1+7.4 M J as well as the host star's rotation rate ( vsini*=55.6±1.8 km s−1). We also present the discovery of a new comoving group of stars, designated as MELANGE-6, and determine that HIP 33609 is a member. We use a combination of rotation periods and isochrone models fit to the cluster members to estimate an age of 150 ± 25 Myr. With a measured mass, radius, and age, HIP 33609 b becomes a benchmark for substellar evolutionary models.

AB - We present the discovery and characterization of HIP 33609 b, a transiting warm brown dwarf orbiting a late B star, discovered by NASA's Transiting Exoplanet Survey Satellite as TOI-588 b. HIP 33609 b is a large (R b = 1.580−0.070+0.074 R J) brown dwarf on a highly eccentric (e = 0.560−0.031+0.029 ) orbit with a 39 days period. The host star is a bright (V = 7.3 mag), T eff = 10,400 −660+800 K star with a mass of M * = 2.383−0.095+0.10 M ⊙ and radius of R * = 1.863−0.082+0.087 R ⊙, making it the hottest transiting brown dwarf host star discovered to date. We obtained radial velocity measurements from the CHIRON spectrograph confirming the companion's mass of M b = 68.0−7.1+7.4 M J as well as the host star's rotation rate ( vsini*=55.6±1.8 km s−1). We also present the discovery of a new comoving group of stars, designated as MELANGE-6, and determine that HIP 33609 is a member. We use a combination of rotation periods and isochrone models fit to the cluster members to estimate an age of 150 ± 25 Myr. With a measured mass, radius, and age, HIP 33609 b becomes a benchmark for substellar evolutionary models.

KW - Direct imaging

KW - Exoplanets

KW - Young star clusters

KW - Exoplanet evolution

KW - Brown dwarfs

KW - CCD photometry

KW - High resolution spectroscopy

U2 - 10.3847/1538-3881/acd197

DO - 10.3847/1538-3881/acd197

M3 - Article

SN - 0004-6256

VL - 165

JO - The Astronomical Journal

JF - The Astronomical Journal

IS - 6

M1 - 268

ER -

HIP 33609 b: An Eccentric Brown Dwarf Transiting a V = 7.3 Rapidly Rotating B Star

Abstract

Bibliographical note

Keywords

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