2018A&A...620A.171L


Query : 2018A&A...620A.171L

2018A&A...620A.171L - Astronomy and Astrophysics, volume 620A, 171-171 (2018/12-1)

The CARMENES search for exoplanets around M dwarfs. The warm super-Earths in twin orbits around the mid-type M dwarfs Ross 1020 (GJ 3779) and LP 819-052 (GJ 1265).

LUQUE R., NOWAK G., PALLE E., KOSSAKOWSKI D., TRIFONOV T., ZECHMEISTER M., BEJAR V.J.S., GUILLEN C.C., TAL-OR L., HIDALGO D., RIBAS I., REINERS A., CABALLERO J.A., AMADO P.J., QUIRRENBACH A., ACEITUNO J., CORTES-CONTRERAS M., DIEZ-ALONSO E., DREIZLER S., GUENTHER E.W., HENNING T., JEFFERS S.V., KAMINSKI A., KURSTER M., LAFARGA M., MONTES D., MORALES J.C., PASSEGGER V.M., SCHMITT J.H.M.M. and SCHWEITZER A.

Abstract (from CDS):

We announce the discovery of two planetary companions orbiting around the low-mass stars Ross 1020 (GJ 3779, M4.0V) and LP 819-052 (GJ 1265, M4.5V). The discovery is based on the analysis of CARMENES radial velocity (RV) observations in the visual channel as part of its survey for exoplanets around M dwarfs. In the case of GJ 1265, CARMENES observations were complemented with publicly available Doppler measurements from HARPS. The datasets reveal two planetary companions, one for each star, that share very similar properties: minimum masses of 8.0±0.5M and 7.4±0.5M in low-eccentricity orbits with periods of 3.023±0.001 d and 3.651±0.001d for GJ 3779 b and GJ 1265 b, respectively. The periodic signals around 3d found in the RV data have no counterpart in any spectral activity indicator. Furthermore, we collected available photometric data for the two host stars, which confirm that the additional Doppler variations found at periods of approximately 95d can be attributed to the rotation of the stars. The addition of these planets to a mass-period diagram of known planets around M dwarfs suggests a bimodal distribution with a lack of short-period low-mass planets in the range of 2-5M. It also indicates that super-Earths (>5M) currently detected by RV and transit techniques around M stars are usually found in systems dominated by a single planet.

Abstract Copyright: © ESO 2018

Journal keyword(s): techniques: radial velocities - stars: late-type - stars: low-mass - planetary systems

VizieR on-line data: <Available at CDS (J/A+A/620/A171): table1.dat table2.dat>

Simbad objects: 24

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Number of rows : 24
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* YZ Cet Er* 01 12 30.6368826382 -16 59 56.358011559 15.315 13.885 12.074 10.696 8.938 M4.0Ve 236 0
2 BD-17 400 PM* 02 09 10.9011756479 -16 20 22.529309927   12.82 10.877 10.530   K9Vk: 44 0
3 BD+02 348 PM* 02 12 20.9873991153 +03 34 32.232373243 12.552 11.477 10.042 9.092 7.988 M1V 171 0
4 HD 285968 PM* 04 42 55.7750207949 +18 57 29.395947044 12.668 11.49 9.951 8.931 7.702 M2.5V 297 2
5 LP 656-38 Er* 05 01 57.4261317472 -06 56 46.376281497   13.92 12.196 11.791 9.175 M4.0Ve 118 0
6 BD+05 1668 PM* 07 27 24.4989685603 +05 13 32.841491057 12.558 11.443 9.872 8.699 7.161 M3.5V 377 0
7 L 320-124 PM* 10 14 51.7786855411 -47 09 24.192778106       13.067   M4 94 0
8 CD-30 8858 PM* 10 58 35.0883696526 -31 08 38.200769022     11.926 11.588 9.63 M2 46 1
9 CD-31 9113 PM* 11 35 26.9477670462 -32 32 23.884215079 12.508 11.322 9.813 8.821 7.664 M2V 141 1
10 Ross 128 Er* 11 47 44.3972681420 +00 48 16.400337591 14.223 12.905 11.153 9.859 8.184 dM4 381 0
11 Ross 1020 PM* 13 22 56.7475808912 +24 28 03.598852682   14.55   12.577   M4V 60 0
12 GJ 3779 b Pl 13 22 56.7478620635 +24 28 03.602504694           ~ 4 0
13 HD 122303 PM* 14 01 03.1882316643 -02 39 17.519814662 12.343 11.177 9.707 8.745 7.66 M0V 144 0
14 BD-07 4003 BY* 15 19 26.8269387505 -07 43 20.189497466 13.403 11.76 10.560 9.461 8.911 M3V 593 2
15 MCC 759 PM* 16 09 03.1407662856 +52 56 37.956748812       9.706   M0.5V 57 0
16 BD-12 4523 BY* 16 30 18.0583947383 -12 39 45.321217732 12.829 11.638 10.072 8.917 7.421 M3V 287 0
17 G 139-21 PM* 17 15 18.9339850845 +04 57 50.066612336       14.394   M4.5V 284 1
18 BD+11 3149 PM* 17 16 00.6368683489 +11 03 27.615757436 13.521 12.338 10.828 9.858 8.767 M1V 61 0
19 HD 156384C PM* 17 18 58.8272997802 -34 59 48.612673382 12.96 11.79 10.22 10.05 8.82 M1.5V 191 1
20 CD-51 10924 PM* 17 30 11.2044753442 -51 38 13.130309109 12.317 11.028 9.585 8.675 8.60 M0V 94 1
21 NAME L 788-37b Pl 22 13 42.8628179730 -17 41 08.676495139           ~ 5 0
22 L 788-37 PM* 22 13 42.8631007040 -17 41 08.670606651   15.32 13.672 13.443   dM4.5 65 0
23 BD-15 6290 BY* 22 53 16.7325836486 -14 15 49.304052185 12.928 11.749 10.192 9.013 7.462 M3.5V 930 1
24 TRAPPIST-1 LM* 23 06 29.3684948589 -05 02 29.037301866     18.798 16.466 14.024 M7.5e 736 0

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2022.08.15-13:55:35

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