J/A+A/659/A17 GJ 3929 b RVs and activity indicators (Kemmer+, 2022)
Discovery and mass measurement of the hot, transiting, Earth-sized planet
GJ 3929 b.
Kemmer J., Dreizler S., Kossakowski D., Stock S., Quirrenbach A.,
Caballero J.A., Amado P.J., Collins K.A., Espinoza N., Herrero E.,
Jenkins J.M., Latham D.W., Lillo-Box J., Narita N., Palle E., Reiners A.,
Ribas I., Ricker G., Rodriguez E., Seager S., Vanderspek R., Wells R.,
Winn J., Aceituno F.J., Bejar V.J.S., Barclay T., Bluhm P., Chaturvedi P.,
Cifuentes C., Collins K.I., Cortes-Contreras M., Demory B.O.,
Fausnaugh M.M., Fukui A., Gomez Maqueo Chew Y., Galadi-Enriquez D., Gan T.,
Gillon M., Golovin A., Hatzes A.P., Henning T., Huang C., Jeffers S.V.,
Kaminski A., Kunimoto M., Kurster M., Lopez-Gonzalez M.J., Lafarga M.,
Luque R., McCormac J., Molaverdikhani K., Montes D., Morales J.C.,
Passegger V.M., Reffert S., Sabin L., Schoefer P., Schanche N.,
Schlecker M., Schroffenegger U., Schwarz R.P., Schweitzer A., Sota A.,
Tenenbaum P., Trifonov T., Vanaverbeke S., Zechmeister M.
<Astron. Astrophys. 659, A17 (2022)>
=2022A&A...659A..17K 2022A&A...659A..17K (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Radial velocities ;
Optical
Keywords: planetary systems - techniques: radial velocities -
techniques: photometric - stars: individual: GJ 3929 -
stars: late-type - planets and satellites: detection
Abstract:
We report the discovery of GJ 3929 b, a hot Earth-sized planet
orbiting the nearby M3.5 V dwarf star, GJ 3929 (G 180-18, TOI-2013).
Joint modelling of photometric observations from TESS sectors 24 and
25 together with 73 spectroscopic observations from CARMENES and
follow-up transit observations from SAINT-EX, LCOGT, and OSN yields a
planet radius of Rb=1.150±0.040Re, a mass of
Mb=1.21±0.42Me, and an orbital period of
Pb=2.6162745±0.0000030d. The resulting density of
rhob=4.4±1.6g/cm3 is compatible with the Earth's mean density of
about 5.5g/cm3. Due to the apparent brightness of the host star
(J=8.7mag) and its small size, GJ 3929 b is a promising target for
atmospheric characterisation with the JWST. Additionally, the radial
velocity data show evidence for another planet candidate with
P[c]=14.303±0.035d, which is likely unrelated to the stellar
rotation period, Prot=122±13d, which we determined from archival
HATNet and ASAS-SN photometry combined with newly obtained TJO data.
Description:
Radial velocities and activity indices of GJ 3929 acquired with
CARMENES (Quirrenbach et al., 2014, in Proc. SPIE, Vol. 9147,
Ground-based and Airborne Instrumentation for Astronomy V, 91471F), a
high-resolution precise echelle spectrograph mounted at the 3.5m
telescope at the Calar Alto Observatory in Spain.
Objects:
-----------------------------------------------------------------
RA (2000) DE Designation(s)
-----------------------------------------------------------------
15 58 18.80 +35 24 24.3 GJ 3929 = Karmn J15583+354 = G 180-18
-----------------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tableg1.dat 140 78 CARMENES RVs and various activity indicators
of GJ 3929
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tableg1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 F13.5 d BJD Barycentric Julian date
15- 18 F4.1 m/s RV ? Radial velocity
20- 23 F4.1 m/s e_RV ? Radial velocity uncertainty
25- 29 F5.1 m/s CRX Chromatic index (in m/s/Np units)
31- 34 F4.1 m/s e_CRX Chromatic index uncertainty
(in m/s/Np units)
36- 41 F6.4 0.1nm Halpha Halpha index
43- 48 F6.4 0.1nm e_Halpha Halpha index uncertainty
50- 55 F6.4 0.1nm CaIRTb CaII-IRT1 index
57- 62 F6.4 0.1nm e_CaIRTb CaII-IRT1 index uncertainty
64- 69 F6.4 0.1nm NaD1 NaD1 index
71- 76 F6.4 0.1nm e_NaD1 NaD1 index uncertainty
78- 83 F6.4 0.1nm NaD2 NaD2 index
85- 90 F6.4 0.1nm e_NaD2 NaD2 index uncertainty
92- 99 F8.5 0.1nm TiO7050 ? TiO absorption band index at 7050Å
101-108 F8.5 0.1nm e_TiO7050 ? TiO absorption band index at 7050Å
uncertainty
110-116 F7.4 0.1nm TiO8430 ? TiO absorption band index at 8430Å
118-124 F7.4 0.1nm e_TiO8430 ? TiO absorption band index at 8430Å
uncertainty
126-132 F7.4 0.1nm TiO8860 ? TiO absorption band index at 8860Å
134-140 F7.4 0.1nm e_TiO8860 ? TiO absorption band index at 8860Å
uncertainty
--------------------------------------------------------------------------------
Acknowledgements:
Jonas Kemmer, jkemmer(at)lsw.uni-heidelberg.de
(End) Patricia Vannier CDS 22-Feb-2022