HATS-8b: A low-density transiting super-neptune

D. Bayliss; J. D. Hartman; G. Bakos; K. Penev; G. Zhou; R. Brahm; M. Rabus; A. Jordán; L. Mancini; M. De Val-Borro; W. Bhatti; N. Espinoza; Z. Csubry; A. W. Howard; B. J. Fulton; L. A. Buchhave; T. Henning; B. Schmidt; S. Ciceri; R. W. Noyes; H. Isaacson; G. W. Marcy; V. Suc; J. Lázár; I. Papp; P. Sári

doi:10.1088/0004-6256/150/2/49

HATS-8b: A low-density transiting super-neptune

D. Bayliss, J. D. Hartman, G. Bakos, K. Penev, G. Zhou, R. Brahm, M. Rabus, A. Jordán, L. Mancini, M. De Val-Borro, W. Bhatti, N. Espinoza, Z. Csubry, A. W. Howard, B. J. Fulton, L. A. Buchhave, T. Henning, B. Schmidt, S. Ciceri, R. W. NoyesH. Isaacson, G. W. Marcy, V. Suc, J. Lázár, I. Papp, P. Sári

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Abstract

HATS-8b is a low density transiting super-Neptune discovered as part of the HATSouth project. The planet orbits its solar-like G-dwarf host (V = , = K) with a period of days. HATS-8b is the third lowest-mass transiting exoplanet to be discovered from a wide-field ground-based search, and with a mass of it is approximately halfway between the masses of Neptune and Saturn. However, HATS-8b has a radius of , resulting in a bulk density of just . The metallicity of the host star is super-solar ( = ), providing evidence against the idea that low-density exoplanets form from metal-poor environments. The low density and large radius of HATS-8b results in an atmospheric scale height of almost 1000 km, and in addition to this there is an excellent reference star of nearly equal magnitude at just 19″ separation in the sky. These factors make HATS-8b an exciting target for future atmospheric characterization studies, particularly for long-slit transmission spectroscopy.

Original language	English
Article number	49
Journal	Astronomical Journal
Volume	150
Issue number	2
DOIs	https://doi.org/10.1088/0004-6256/150/2/49
Publication status	Published - 1 Aug 2015

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Bayliss, D., Hartman, J. D., Bakos, G., Penev, K., Zhou, G., Brahm, R., Rabus, M., Jordán, A., Mancini, L., Val-Borro, M. D., Bhatti, W., Espinoza, N., Csubry, Z., Howard, A. W., Fulton, B. J., Buchhave, L. A., Henning, T., Schmidt, B., Ciceri, S., ... Sári, P. (2015). HATS-8b: A low-density transiting super-neptune. Astronomical Journal, 150(2), Article 49. https://doi.org/10.1088/0004-6256/150/2/49

@article{4936e4b623b54c39ac58bdc2ba7249bd,

title = "HATS-8b: A low-density transiting super-neptune",

abstract = "HATS-8b is a low density transiting super-Neptune discovered as part of the HATSouth project. The planet orbits its solar-like G-dwarf host (V = , = K) with a period of days. HATS-8b is the third lowest-mass transiting exoplanet to be discovered from a wide-field ground-based search, and with a mass of it is approximately halfway between the masses of Neptune and Saturn. However, HATS-8b has a radius of , resulting in a bulk density of just . The metallicity of the host star is super-solar ( = ), providing evidence against the idea that low-density exoplanets form from metal-poor environments. The low density and large radius of HATS-8b results in an atmospheric scale height of almost 1000 km, and in addition to this there is an excellent reference star of nearly equal magnitude at just 19″ separation in the sky. These factors make HATS-8b an exciting target for future atmospheric characterization studies, particularly for long-slit transmission spectroscopy.",

keywords = "planetary systems, stars: individual (HATS-8), techniques: photometric, techniques: spectroscopic",

author = "D. Bayliss and Hartman, {J. D.} and G. Bakos and K. Penev and G. Zhou and R. Brahm and M. Rabus and A. Jord{\'a}n and L. Mancini and Val-Borro, {M. De} and W. Bhatti and N. Espinoza and Z. Csubry and Howard, {A. W.} and Fulton, {B. J.} and Buchhave, {L. A.} and T. Henning and B. Schmidt and S. Ciceri and Noyes, {R. W.} and H. Isaacson and Marcy, {G. W.} and V. Suc and J. L{\'a}z{\'a}r and I. Papp and P. S{\'a}ri",

year = "2015",

month = aug,

day = "1",

doi = "10.1088/0004-6256/150/2/49",

language = "English",

volume = "150",

journal = "Astronomical Journal",

issn = "0004-6256",

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Bayliss, D, Hartman, JD, Bakos, G, Penev, K, Zhou, G, Brahm, R, Rabus, M, Jordán, A, Mancini, L, Val-Borro, MD, Bhatti, W, Espinoza, N, Csubry, Z, Howard, AW, Fulton, BJ, Buchhave, LA, Henning, T, Schmidt, B, Ciceri, S, Noyes, RW, Isaacson, H, Marcy, GW, Suc, V, Lázár, J, Papp, I & Sári, P 2015, 'HATS-8b: A low-density transiting super-neptune', Astronomical Journal, vol. 150, no. 2, 49. https://doi.org/10.1088/0004-6256/150/2/49

TY - JOUR

T1 - HATS-8b

T2 - A low-density transiting super-neptune

AU - Bayliss, D.

AU - Hartman, J. D.

AU - Bakos, G.

AU - Penev, K.

AU - Zhou, G.

AU - Brahm, R.

AU - Rabus, M.

AU - Jordán, A.

AU - Mancini, L.

AU - Val-Borro, M. De

AU - Bhatti, W.

AU - Espinoza, N.

AU - Csubry, Z.

AU - Howard, A. W.

AU - Fulton, B. J.

AU - Buchhave, L. A.

AU - Henning, T.

AU - Schmidt, B.

AU - Ciceri, S.

AU - Noyes, R. W.

AU - Isaacson, H.

AU - Marcy, G. W.

AU - Suc, V.

AU - Lázár, J.

AU - Papp, I.

AU - Sári, P.

PY - 2015/8/1

Y1 - 2015/8/1

N2 - HATS-8b is a low density transiting super-Neptune discovered as part of the HATSouth project. The planet orbits its solar-like G-dwarf host (V = , = K) with a period of days. HATS-8b is the third lowest-mass transiting exoplanet to be discovered from a wide-field ground-based search, and with a mass of it is approximately halfway between the masses of Neptune and Saturn. However, HATS-8b has a radius of , resulting in a bulk density of just . The metallicity of the host star is super-solar ( = ), providing evidence against the idea that low-density exoplanets form from metal-poor environments. The low density and large radius of HATS-8b results in an atmospheric scale height of almost 1000 km, and in addition to this there is an excellent reference star of nearly equal magnitude at just 19″ separation in the sky. These factors make HATS-8b an exciting target for future atmospheric characterization studies, particularly for long-slit transmission spectroscopy.

AB - HATS-8b is a low density transiting super-Neptune discovered as part of the HATSouth project. The planet orbits its solar-like G-dwarf host (V = , = K) with a period of days. HATS-8b is the third lowest-mass transiting exoplanet to be discovered from a wide-field ground-based search, and with a mass of it is approximately halfway between the masses of Neptune and Saturn. However, HATS-8b has a radius of , resulting in a bulk density of just . The metallicity of the host star is super-solar ( = ), providing evidence against the idea that low-density exoplanets form from metal-poor environments. The low density and large radius of HATS-8b results in an atmospheric scale height of almost 1000 km, and in addition to this there is an excellent reference star of nearly equal magnitude at just 19″ separation in the sky. These factors make HATS-8b an exciting target for future atmospheric characterization studies, particularly for long-slit transmission spectroscopy.

KW - planetary systems

KW - stars: individual (HATS-8)

KW - techniques: photometric

KW - techniques: spectroscopic

UR - http://www.scopus.com/inward/record.url?scp=84938315663&partnerID=8YFLogxK

U2 - 10.1088/0004-6256/150/2/49

DO - 10.1088/0004-6256/150/2/49

M3 - Article

SN - 0004-6256

VL - 150

JO - Astronomical Journal

JF - Astronomical Journal

IS - 2

M1 - 49

ER -

HATS-8b: A low-density transiting super-neptune

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