SIMBAD references

2019MNRAS.486.5094W - Mon. Not. R. Astron. Soc., 486, 5094-5103 (2019/July-2)

NGTS-4b: A sub-Neptune transiting in the desert.

WEST R.G., GILLEN E., BAYLISS D., BURLEIGH M.R., DELREZ L., GUNTHER M.N., HODGKIN S.T., JACKMAN J.A.G., JENKINS J.S., KING G., McCORMAC J., NIELSEN L.D., RAYNARD L., SMITH A.M.S., SOTO M., TURNER O., WHEATLEY P.J., ALMLEAKY Y., ARMSTRONG D.J., BELARDI C., BOUCHY F., BRIEGAL J.T., BURDANOV A., CABRERA J., CASEWELL S.L., CHAUSHEV A., CHAZELAS B., CHOTE P., COOKE B.F., CSIZMADIA S., DUCROT E., EIGMULLER P., ERIKSON A., FOXELL E., GANSICKE B.T., GILLON M., GOAD M.R., JEHIN E., LAMBERT G., LONGSTAFF E.S., LOUDEN T., MOYANO M., MURRAY C., POLLACCO D., QUELOZ D., RAUER H., SOHY S., THOMPSON S.J., UDRY S., WALKER S.R. and WATSON C.A.

Abstract (from CDS):

We report the discovery of NGTS-4b, a sub-Neptune-sized planet transiting a 13th magnitude K-dwarf in a 1.34 d orbit. NGTS-4b has a mass M = 20.6 ± 3.0 M⊕ and radius R = 3.18 ± 0.26 R⊕, which places it well within the so-called 'Neptunian Desert'. The mean density of the planet (3.45 ± 0.95 g cm–3) is consistent with a composition of 100 per cent H2O or a rocky core with a volatile envelope. NGTS-4b is likely to suffer significant mass loss due to relatively strong EUV/X-ray irradiation. Its survival in the Neptunian desert may be due to an unusually high-core mass, or it may have avoided the most intense X-ray irradiation by migrating after the initial activity of its host star had subsided. With a transit depth of 0.13 ± 0.02 per cent, NGTS-4b represents the shallowest transiting system ever discovered from the ground, and is the smallest planet discovered in a wide-field ground-based photometric survey.

Abstract Copyright: © The Author(s) 2019. Published by Oxford University Press on behalf of The Royal Astronomical Society.

Journal keyword(s): techniques: photometric - planets and satellites: detection - stars: individual: NGTS-4 - planetary systems

VizieR on-line data: <Available at CDS (J/MNRAS/486/5094): table4.dat table5.dat table1a.dat-table1h.dat table2.dat table3.dat>

Simbad objects: 7

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