In:
The Astronomical Journal, American Astronomical Society, Vol. 163, No. 4 ( 2022-04-01), p. 158-
Abstract:
We present 12 new transit light curves and 16 new out-of-transit radial-velocity measurements for the XO-3 system. By modeling our newly collected measurements together with archival photometric and Doppler velocimetric data, we confirmed the unusual configuration of the XO-3 system, which contains a massive planet ( M P = 11.92 − 0.63 + 0.59 M J ) on a relatively eccentric ( e = 0.2853 − 0.0026 + 0.0027 ) and short-period (3.19152 ± 0.00145 day) orbit around a massive star ( M * = 1.219 − 0.095 + 0.090 M ⊙ ). Furthermore, we find no strong evidence for a temporal change of either V sin i * (and by extension, the stellar spin vector of XO-3), or the transit profile (and thus orbital angular momentum vector of XO-3b). We conclude that the discrepancy in previous Rossiter–McLaughlin measurements (70.0° ± 15.0°; Hébrard et al. 2008; 37.3° ± 3.7°; Winn et al. 2009; 37.3° ± 3.0°; Hirano et al. 2011) may have stemmed from systematic noise sources.
Type of Medium:
Online Resource
ISSN:
0004-6256
,
1538-3881
DOI:
10.3847/1538-3881/ac4e1a
Language:
Unknown
Publisher:
American Astronomical Society
Publication Date:
2022
detail.hit.zdb_id:
2207625-6
detail.hit.zdb_id:
2003104-X
SSG:
16,12
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