Toward the Confirmation of an Ultra-Short Period Hot Jupiter 'Puffy Planet' with a Near Grazing Transit, TOI-2341.01

摘要

This paper reports on ground-based observations of the candidate exoplanet TOI-2341.01 (TESS Object of Interesl-2341.01), initially observed by the Transiting Exoplanet Survey Satellite (TESS). The analysis of data provides evidence for the increased likelihood that TOI-2341.01 is a Jupiter-sized gas giant with a radius of 86,409 km±6,011 km （R_(jup) 1.209± R_(jup) 0.084），orbiting the host star TOI-2341 at 0.0118AU±0.00073AU with a transit duration of 0.065 days±0.006 days (1.560±0.144 hours or 93.6 minutes ± 7 minutes). T01-2341.01 has an orbital period of 0.877640 days ± 0.000004 day (21.0634 hours ± 0.0002 hour) and has a mid-transit time of BJD TDB 2459411.74201 ± 0.00010. Furthermore, a grazing criterion value of 0.99 ± 0.14 was calculated, determining that TOI-2341.01 is highly likely to be a near-grazing transit. It is also noted that estimated mass values were attained via the TESS Follow-up Observation Program, projecting TOI-2341.01's mass as 55.3 M_E (0.17M_j) and thus possessing an estimated density of 122.28 kg/m~3 (0.12228 g/cm~3). This investigation has also cleared the field surrounding TOI-2341.01 out to 43 arcminutes of eclipsing binaries that could produce a false positive.