2019A&A...625A..18H

Query : 2019A&A...625A..18H

2019A&A...625A..18H - Astronomy and Astrophysics, volume 625A18-18 (2019/5-1)

The SOPHIE search for northern extrasolar planets. XV. A warm Neptune around the M dwarf Gl 378.

HOBSON M.J., DELFOSSE X., ASTUDILLO-DEFRU N., BOISSE I., DIAZ R.F., BOUCHY F., BONFILS X., FORVEILLE T., ARNOLD L., BORGNIET S., BOURRIER V., BRUGGER B., CABRERA SALAZAR N., COURCOL B., DALAL S., DELEUIL M., DEMANGEON O., DUMUSQUE X., HARA N., HEBRARD G., KIEFER F., LOPEZ T., MIGNON L., MONTAGNIER G., MOUSIS O., MOUTOU C., PEPE F., REY J., SANTERNE A., SANTOS N.C., STALPORT M., SEGRANSAN D., UDRY S. and WILSON P.A.

Abstract (from CDS):

We present the detection of a warm Neptune orbiting the M dwarf Gl 378, using radial velocity measurements obtained with the SOPHIE spectrograph at the Observatoire de Haute-Provence. The star was observed in the context of the SOPHIE exoplanet consortium's sub-programme dedicated to finding planets around M dwarfs. Gl 378 is an M1 star, of solar metallicity, at a distance of 14.96pc. The single planet detected, Gl 378 b, has a minimum mass of 13.02MEarth and an orbital period of 3.82 days, which place it at the lower boundary of the hot Neptune desert. As one of only a few such planets around M dwarfs, Gl 378 b provides important clues to the evolutionary history of these close-in planets. In particular, the eccentricity of 0.1 may point to a high-eccentricity migration. The planet may also have lost part of its envelope due to irradiation.

Abstract Copyright: © M. J. Hobson et al. 2019

Journal keyword(s): techniques: radial velocities - planetary systems - stars: late-type - stars: individual: Gl 378

Simbad objects: 17

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Number of rows : 17
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HD 1326 PM* 00 18 22.8849799680 +44 01 22.637951588   9.61 8.14 7.3   M2V 602 0
2 HD 9407 PM* 01 34 33.2647932084 +68 56 53.289515638   7.21   6.1   G6.5V 175 0
3 BD+47 612b Pl 02 22 14.6437562448 +47 52 48.104862600           ~ 12 0
4 LP 424-4 PM* 07 59 05.8395356736 +15 23 29.236065000   13.5   11.934   M2.0V 172 1
5 NAME LP 424-4b Pl 07 59 05.8395356736 +15 23 29.236065000           ~ 387 1
6 BD+48 1829b Pl 10 02 21.7516616950 +48 05 19.685202030           ~ 6 0
7 BD+48 1829 PM* 10 02 21.7516616950 +48 05 19.685202030       9.4   M1V 119 0
8 HD 89269 PM* 10 18 51.9477652368 +44 02 53.954220509   7.31   6.2   G4V 160 0
9 HD 95735 PM* 11 03 20.1948195942 +35 58 11.576182057 10.030 8.960 7.520 5.99 4.79 M2+V 795 0
10 Ross 905b Pl 11 42 11.0933350978 +26 42 23.650782778           ~ 913 1
11 BD+11 2576 PM* 13 29 59.7858994351 +10 22 37.784532575 11.728 10.524 9.029 8.07 7.013 M1.0V 313 0
12 BD+46 1889 ** 13 39 24.1022767773 +46 11 11.363133111       9.800   M1.0V 106 0
13 HD 147379 PM* 16 16 42.7463475871 +67 14 19.831647336   10.01   8.730   M1-Ve 262 0
14 BD+18 3421 PM* 17 37 53.3468417549 +18 35 30.164096453 12.315 11.109 9.577 8.599 7.525 M1.5V 257 0
15 BD+43 2796 PM* 17 43 55.9629842863 +43 22 43.000025414   12.10 10.49 10.07   M2V 137 0
16 * sig Dra PM* 19 32 21.5902098601 +69 39 40.235805206 5.860 5.460 4.680 4.04 3.63 K0V 691 0
17 HD 221354 PM* 23 31 22.2087431778 +59 09 55.867801045   7.57   6.2   K0V 190 0

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