Aliasing in the Radial Velocities of YZ Ceti: An Ultra-short Period for YZ Ceti c?
Aliasing in the Radial Velocities of YZ Ceti: An Ultra-short Period for YZ Ceti c?
复制标题
YZ Ceti 径向速度的混叠:YZ Ceti c 的超短周期?
DOI:
10.3847/2041-8213/aadc0b
复制
发表时间:
2018
期刊:
影响因子:
--
通讯作者:
P. Robertson
中科院分区:
文献类型:
--
作者:
P. Robertson
Mid-to-late M stars are opportunistic targets for the study of low-mass exoplanets in transit because of the high planet-to-star radius ratios of their planets. Recent studies of such stars have shown that, like their early-M counterparts, they often host multi-resonant networks of small planets. Here, I reanalyze radial velocity measurements of YZ Ceti, an active M4 dwarf for which the HARPS exoplanet survey recently discovered three exoplanets on short-period (P = 4.66, 3.06, 1.97 days) orbits. My analysis finds that the orbital periods of the inner two planets cannot be uniquely determined using the published HARPS velocities. In particular, it appears likely that the 3.06 day period of YZ Ceti c is an alias and that its true period is 0.75 days. If so, the revised minimum mass of this planet is less than 0.6 Earth masses and its geometric transit probability increases to 10%. I encourage additional observations to determine the true periods of YZ Ceti b and c and suggest a search for transits at the 0.75 day period in TESS light curves.
DOI:
10.1117/12.2231880
发表时间:
2016
期刊:
影响因子:
--
作者:
Quirrenbach;Caballero
通讯作者:
Caballero
DOI:
10.1088/1538-3873/aaaaa8
发表时间:
2018
影响因子:
3.5
作者:
Fulton, Benjamin J.;Petigura, Erik A.;Blunt, Sarah;Sinukoff, Evan
通讯作者:
Sinukoff, Evan