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

Astrophysical Sciences

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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 ( v sin i * = 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 (US)
Article number	268
Journal	Astronomical Journal
Volume	165
Issue number	6
DOIs	https://doi.org/10.3847/1538-3881/acd197
State	Published - Jun 1 2023

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/1538-3881/acd197

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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. Astronomical Journal, 165(6), Article 268. https://doi.org/10.3847/1538-3881/acd197

@article{48e4b18d8c8f43f4b10a5900f9d6a7e2,

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 ( v sin i * = 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.",

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 = "Publisher Copyright: {\textcopyright} 2023. The Author(s). Published by the American Astronomical Society.",

year = "2023",

month = jun,

day = "1",

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

language = "English (US)",

volume = "165",

journal = "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', Astronomical Journal, vol. 165, no. 6, 268. 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.

PY - 2023/6/1

Y1 - 2023/6/1

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 ( v sin i * = 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 ( v sin i * = 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.

UR - http://www.scopus.com/inward/record.url?scp=85161472597&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85161472597&partnerID=8YFLogxK

U2 - 10.3847/1538-3881/acd197

DO - 10.3847/1538-3881/acd197

M3 - Article

AN - SCOPUS:85161472597

SN - 0004-6256

VL - 165

JO - Astronomical Journal

JF - Astronomical Journal

IS - 6

M1 - 268

ER -

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

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