干旱区生态环境知识资源中心(Arid): TOI-674b: An oasis in the desert of exo-Neptunes transiting a nearby M dwarf star

Arid

DOI	10.1051/0004-6361/202140718
	TOI-674b: An oasis in the desert of exo-Neptunes transiting a nearby M dwarf star
	Murgas, F.; Astudillo-Defru, N.; Bonfils, X.; Crossfield, I; Almenara, J. M.; Livingston, J.; Stassun, K. G.; Korth, J.; Orell-Miquel, J.; Morello, G.; Eastman, J. D.; Lissauer, J. J.; Kane, S. R.; Morales, F. Y.; Werner, M. W.; Gorjian, V; Benneke, B.; Dragomir, D.; Matthews, E. C.; Howell, S. B.; Ciardi, D.; Gonzales, E.; Matson, R.; Beichman, C.; Schlieder, J.; Collins, K. A.; Collins, K., I; Jensen, E. L. N.; Evans, P.; Pozuelos, F. J.; Gillon, M.; Jehin, E.; Barkaoui, K.; Artigau, E.; Bouchy, F.; Charbonneau, D.; Delfosse, X.; Diaz, R. F.; Doyon, R.; Figueira, P.; Forveille, T.; Lovis, C.; Melo, C.; Gaisne, G.; Pepe, F.; Santos, N. C.; Segransan, D.; Udry, S.; Goeke, R. F.; Levine, A. M.; Quintana, E., V; Guerrero, N. M.; Mireles, I; Caldwell, D. A.; Tenenbaum, P.; Brasseur, C. E.; Ricker, G.; Vanderspek, R.; Latham, D. W.; Seager, S.; Winn, J.; Jenkins, J. M.
通讯作者	Murgas, F (corresponding author), Inst Astrofis Canarias IAC, Tenerife 38205, Spain. ; Murgas, F (corresponding author), Univ La Laguna ULL, Dept Astrofis, Tenerife 38206, Spain.
来源期刊	ASTRONOMY & ASTROPHYSICS
ISSN	0004-6361
EISSN	1432-0746
出版年	2021
卷号	653
英文摘要	Context. The NASA mission TESS is currently doing an all-sky survey from space to detect transiting planets around bright stars. As part of the validation process, the most promising planet candidates need to be confirmed and characterized using follow-up observations. Aims. In this article, our aim is to confirm the planetary nature of the transiting planet candidate TOI-674b using spectroscopic and photometric observations. Methods. We use TESS, Spitzer, ground-based light curves, and HARPS spectrograph radial velocity measurements to establish the physical properties of the transiting exoplanet candidate TOI-674b. We perform a joint fit of the light curves and radial velocity time series to measure the mass, radius, and orbital parameters of the candidate. Results. We confirm and characterize TOI-674b, a low-density super-Neptune transiting a nearby M dwarf. The host star (TIC 158588995, V = 14.2 mag, J = 10.3 mag) is characterized by its M2V spectral type with M = 0.420 +/- 0.010 M-circle dot, R = 0.420 +/- 0.013 R-circle dot, and T-eff = 3514 +/- 57 K; it is located at a distance d = 46.16 +/- 0.03 pc. Combining the available transit light curves plus radial velocity measurements and jointly fitting a circular orbit model, we find an orbital period of 1.977143 +/- 3 x 10(-6) days, a planetary radius of 5.25 +/- 0.17 R-circle plus, and a mass of 23.6 +/- 3.3 M-circle plus implying a mean density of rho(p) =0.91 +/- 0.15 g cm(-3). A non-circular orbit model fit delivers similar planetary mass and radius values within the uncertainties. Given the measured planetary radius and mass, TOI-674b is one of the largest and most massive super-Neptune class planets discovered around an M-type star to date. It is found in the Neptunian desert, and is a promising candidate for atmospheric characterization using the James Webb Space Telescope.
英文关键词	planets and satellites general planets and satellites gaseous planets stars individual TOI-674 techniques photometric techniques radial velocities
类型	Article
语种	英语
开放获取类型	Green Submitted, Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000693380000011
WOS关键词	LOW-MASS STARS ; PLANETARY SYSTEM ; HOT ; ATMOSPHERE ; EXOPLANETS ; FRAMEWORK ; CONFIRMS ; SEARCH ; WATER ; CORE
WOS类目	Astronomy & Astrophysics
WOS研究方向	Astronomy & Astrophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362620
作者单位	[Murgas, F.; Orell-Miquel, J.; Morello, G.] Inst Astrofis Canarias IAC, Tenerife 38205, Spain; [Murgas, F.; Orell-Miquel, J.; Morello, G.] Univ La Laguna ULL, Dept Astrofis, Tenerife 38206, Spain; [Astudillo-Defru, N.] Univ Catolica Santisima Concepcion, Dept Matemat & Fis Aplicadas, Alonso de Rivera 2850, Concepcion, Chile; [Bonfils, X.; Almenara, J. M.; Delfosse, X.; Forveille, T.; Gaisne, G.] Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France; [Crossfield, I] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA; [Livingston, J.] Univ Tokyo, Dept Astron, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan; [Stassun, K. G.] Vanderbilt Univ, Dept Phys & Astron, 6301 Stevenson Ctr Ln, Nashville, TN 37235 USA; [Matthews, E. C.; Bouchy, F.; Lovis, C.; Pepe, F.; Segransan, D.; Udry, S.] Observ Univ Geneve, Chemin Maillettes 51, CH-1290 Versoix, Switzerland; [Lissauer, J. J.; Howell, S. B.; Caldwell, D. A.; Tenenbaum, P.; Jenkins, J. M.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA; [Ciardi, D.; Beichman...
推荐引用方式 GB/T 7714	Murgas, F.,Astudillo-Defru, N.,Bonfils, X.,et al. TOI-674b: An oasis in the desert of exo-Neptunes transiting a nearby M dwarf star[J],2021,653.
APA	Murgas, F..,Astudillo-Defru, N..,Bonfils, X..,Crossfield, I.,Almenara, J. M..,...&Jenkins, J. M..(2021).TOI-674b: An oasis in the desert of exo-Neptunes transiting a nearby M dwarf star.ASTRONOMY & ASTROPHYSICS,653.
MLA	Murgas, F.,et al."TOI-674b: An oasis in the desert of exo-Neptunes transiting a nearby M dwarf star".ASTRONOMY & ASTROPHYSICS 653(2021).