SIMBAD references

2022A&A...664A.163N - Astronomy and Astrophysics, volume 664A, 163-163 (2022/8-1)

The GAPS Programme at TNG. XXXVII. A precise density measurement of the young ultra-short period planet TOI-1807 b,.

NARDIELLO D., MALAVOLTA L., DESIDERA S., BARATELLA M., D'ORAZI V., MESSINA S., BIAZZO K., BENATTI S., DAMASSO M., RAJPAUL V.M., BONOMO A.S., CAPUZZO DOLCETTA R., MALLONN M., CALE B., PLAVCHAN P., EL MUFTI M., BIGNAMINI A., BORSA F., CARLEO I., CLAUDI R., COVINO E., LANZA A.F., MALDONADO J., MANCINI L., MICELA G., MOLINARI E., PINAMONTI M., PIOTTO G., PORETTI E., SCANDARIATO G., SOZZETTI A., ANDREUZZI G., BOSCHIN W., COSENTINO R., FIORENZANO A.F.M., HARUTYUNYAN A., KNAPIC C., PEDANI M., AFFER L., MAGGIO A. and RAINER M.

Abstract (from CDS):


Context. Great strides have been made in recent years in the understanding of the mechanisms involved in the formation and evolution of planetary systems. Despite this, many observational findings have not yet been corroborated by astrophysical explanations. A fine contribution to the study of planetary formation processes comes from the study of young, low-mass planets, with short orbital periods (<100 days). In the last three years, the NASA/TESS satellite has identified many planets of this kind and their characterization is clearly necessary in order to understand how they formed and evolved.
Aims. Within the framework of the Global Architecture of Planetary System (GAPS) project, we performed a validation and characterization (radius and mass) of the ultra-short period planet TOI-1807 b, which orbits its young host star BD+39 2643 (∼300 Myr) in only 13 h. This is the youngest ultra-short period planet discovered so far.
Methods. Thanks to a joint modeling of the stellar activity and planetary signals in the TESS light curve and in new HARPS-N radial-velocity measurements, combined with accurate estimation of stellar parameters, we validated the planetary nature of TOI-1807 b and measured its orbital and physical parameters.
Results. By using astrometric, photometric, and spectroscopic observations, we found that BD+39 2643 is a young, active K dwarf star and a member of a 300±80 Myr old moving group. Furthermore, it rotates in Prot=8.8±0.1 days. This star hosts an ultra-short period planet, exhibiting an orbital period of only Pb=0.54937±0.00001 days. Thanks to the exquisite photometric and spectroscopic series, along with the accurate information on its stellar activity, we measured both the radius and the mass of TOI-1807 b with high precision, obtaining PP,b=1.37±0.09R and MP,b=2.57±0.50M. These planet parameters correspond to a rocky planet with an Earth-like density (ρb=1.0±0.3ρ) and no extended H/He envelope. From the analysis of the age-RP distribution for planets with well measured ages, we inferred that TOI-1807 b may have already lost a large part of its atmosphere over the course of its 300 Myr lifetime.

Abstract Copyright: © D. Nardiello et al. 2022

Journal keyword(s): planets and satellites: fundamental parameters - stars: fundamental parameters - stars: individual: BD+39 2643 - techniques: photometric - techniques: spectroscopic - techniques: radial velocities

VizieR on-line data: <Available at CDS (J/A+A/664/A163): tableb1.dat tablee1.dat tablee2.dat tablee3.dat lcs22.dat lcs23.dat>

Status at CDS : Examining the need for a new acronym. // All or part of tables of objects will be ingested in SIMBAD with priority 1.

Simbad objects: 148

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