Precise masses for the transiting planetary system HD 106315 with HARPS
Precise masses for the transiting planetary system HD 106315 with HARPS
复制标题
带有 HARPS 的凌日行星系统 HD 106315 的精确质量
DOI:
10.1051/0004-6361/201731276
复制
发表时间:
2017
影响因子:
6.5
通讯作者:
Barros S
中科院分区:
文献类型:
--
作者:
Barros S
ContextThe multi-planetary system HD 106315 was recently found in K2 data. The planets have periods ofPb~ 9.55 andPc~ 21.06 days, and radii ofrb= 2.44 ± 0.17R⊕andrc= 4.35 ± 0.23R⊕. The brightness of the host star (V= 9.0 mag) makes it an excellent target for transmission spectroscopy. However, to interpret transmission spectra it is crucial to measure the planetary masses.AimsWe obtained high precision radial velocities for HD 106315 to determine the mass of the two transiting planets discovered withKeplerK2. Our successful observation strategy was carefully tailored to mitigate the effect of stellar variability.MethodsWe modelled the new radial velocity data together with the K2 transit photometry and a new ground-based partial transit of HD 106315c to derive system parameters.ResultsWe estimate the mass of HD 106315b to be 12.6 ± 3.2M⊕and the density to be 4.7 ± 1.7 g cm-3, while for HD 106315c we estimate a mass of 15.2 ± 3.7M⊕and a density of 1.01 ± 0.29 g cm-3. Hence, despite planet c having a radius almost twice as large as planet b, their masses are consistent with one another.ConclusionsWe conclude that HD 106315c has a thick hydrogen-helium gaseous envelope. A detailed investigation of HD 106315b using a planetary interior model constrains the core mass fraction to be 5–29%, and the water mass fraction to be 10–50%. An alternative, not considered by our model, is that HD 106315b is composed of a large rocky core with a thick H–He envelope. Transmission spectroscopy of these planets will give insight into their atmospheric compositions and also help constrain their core compositions.
登录
查看更多内容
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
K. Strehl
通讯作者:
K. Strehl
DOI:
10.1088/0004-637x/800/2/135
发表时间:
2014-12
期刊:
The Astrophysical Journal
影响因子:
--
作者:
C. Dressing;D. Charbonneau;X. Dumusque;S. Gettel;F. Pepe;A. Collier Cameron;D. Latham;E. Molinari;S. Udry;L. Affer;A. Bonomo;L. Buchhave;R. Cosentino;P. Figueira;A. Fiorenzano;A. Harutyunyan;R. Haywood;J. Johnson;M. López-Morales;C. Lovis;L. Malavolta;M. Mayor;G. Micela;F. Motalebi;V. Nascimbeni;D. Phillips;G. Piotto;D. Pollacco;D. Queloz;K. Rice;D. Sasselov;D. Ségransan;A. Sozzetti;A. Szentgyorgyi;C. Watson
通讯作者:
C. Dressing;D. Charbonneau;X. Dumusque;S. Gettel;F. Pepe;A. Collier Cameron;D. Latham;E. Molinari;S. Udry;L. Affer;A. Bonomo;L. Buchhave;R. Cosentino;P. Figueira;A. Fiorenzano;A. Harutyunyan;R. Haywood;J. Johnson;M. López-Morales;C. Lovis;L. Malavolta;M. Mayor;G. Micela;F. Motalebi;V. Nascimbeni;D. Phillips;G. Piotto;D. Pollacco;D. Queloz;K. Rice;D. Sasselov;D. Ségransan;A. Sozzetti;A. Szentgyorgyi;C. Watson
DOI:
--
发表时间:
2002
期刊:
影响因子:
--
作者:
F. Pepe;M. Mayor;F. Galland;D. Naef;D. Queloz;N. Santos;S. Udry;M. Burnet
通讯作者:
M. Burnet
DOI:
10.1007/978-3-319-06956-2_26
发表时间:
2014-07
期刊:
arXiv: Solar and Stellar Astrophysics
影响因子:
--
作者:
S. Sousa
通讯作者:
S. Sousa
DOI:
10.1086/142826
发表时间:
1924-07
期刊:
The Astrophysical Journal
影响因子:
--
作者:
D. B. McLaughlin
通讯作者:
D. B. McLaughlin