K2-38 ESPRESSO RVs : J/A+A/641/A92

Access to
vizier
VizieR
vizier
VizieR FTP ReadMe
TAP
TAP
Xmatch
Fits
Download notebook

Authors : Toledo-Padron B.. Lovis C. orcid , Suarez Mascareno A., Barros S.C.C. (hide) , Suarez Mascareno A., Barros S.C.C. et..al

VizieR DOI : 10.26093/cds/vizier.36410092
Bibcode : 2020A&A...641A..92T (ADS) (Simbad) (Objects)
...(more)
(hide)

CDS Keywords : Stars, double and multiple; Exoplanets; Radial velocities
UAT : Multiple stars, Exoplanets, Radial velocity

Observation (OC)

Records :

Inserted into VizieR : 14-Sep-2020
Last modification : 10-Sep-2021

Characterization of the K2-38 planetary system. Unraveling one of the densest planets knows to date. (2020)

Keywords : techniques radial velocities - techniques: photometric - instrumentation: spectrographs - stars: individual: K2-38 - planets and satellites: detection - planets and satellites: composition

Abstract:An accurate characterization of the known exoplanet population is key to understand the origin and evolution of planetary systems. The determination of true planetary masses through the radial velocity (RV) method is expected to experience a great improvement thanks to the availability of ultra-stable echelle spectrographs. We took advantage of the extreme precision of the new- generation echelle spectrograph ESPRESSO to characterize the transiting planetary system orbiting the G2V star K2-38 located at 194pc from the Sun with V~11.4. This system is particularly interesting because it could contain the densest planet detected to date. ...(more)
Abstract: (hide)
Astronomy and Astrophysics policies
We used the public version of the ESPRESSO pipeline Data-Reduction-Software (DRS) to compute the RVs of K2-38. The pipeline provides a crosscorrelation function (CCF) for each spectrum using a G2 mask that covers the entire wavelength range of the instrument (between 3800 and 7880{AA}). The CCFs were built using a RV step of 0.5km/s within a range between -55 and -15km/s centered on the systemic velocity of the star. This RV time-series presents a RV precision of 1.0m/s with a RMS of 3.6m/s, an extremely good result for a relatively faint G2 star (V=11.34) like K2-38.
Borja Toledo Padron, btoledo(at)iac.es

                


                

                    

                


                

                    

                


                

                    
Catalogue provenance