arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1604.01413astro-ph.EP
收藏

五个K2凌日行星系的多普勒监测

Doppler Monitoring of five K2 Transiting Planetary Systems

Fei Dai, Joshua N. Winn, Simon Albrecht, Pamela Arriagada, Allyson Bieryla, R. Paul Butler, Jeffrey D. Crane, Teruyuki Hirano, John Asher Johnson, Amanda Kiiler… 展开作者

Fei Dai, Joshua N. Winn, Simon Albrecht, Pamela Arriagada, Allyson Bieryla, R. Paul Butler, Jeffrey D. Crane, Teruyuki Hirano, John Asher Johnson, Amanda Kiilerich, David W. Latham, Norio Narita, Grzegorz Nowak, Enric Palle, Ignasi Ribas, Leslie A. Rogers, Roberto Sanchis-Ojeda, Stephen A. Shectman, Johanna K. Teske, Ian B. Thompson, Vincent Van Eylen, Andrew Vanderburg, Robert A. Wittenmyer, Liang Yu

摘要:

为了测量NASA { \it K2}任务发现的行星质量,我们对五颗有凌日行星的恒星进行了精确的多普勒观测。我们提出了这些新的数据和以前发表的多普勒数据的联合分析的结果。第一颗恒星是一颗M矮星,被称为K2-3或EPIC~201367065,有三颗凌日行星(“b”,半径为$2.1~R_{\oplus}$ ;“c”,$1.7~R_{\oplus}$ ;和“d”,$1.5~R_{\oplus}$)。我们的分析导致质量约束:$M_{b}=8.1^{+2.0}_{-1.9}~M_{\oplus}$和$M_{c}$ < $ 4.2~M_{\oplus}$ ~(95\%~conf.)。由于行星d的轨道周期接近恒星自转周期,因此其质量受到的限制很小,这使得很难将行星信号从恒星活动引起的虚假多普勒频移中分离出来。第二颗恒星是一颗G矮星,称为K2-19或EPIC~201505350,有两颗行星(b,$7.7~R_{\oplus}$ ; c,$4.9~R_{\oplus}$)以3:2的平均运动共振,以及一颗较短周期的行星(d,$1.1~R_{\oplus}$)。发现$M_{b}$ = $28.5^{+5.4}_{-5.0} ~M_{\oplus}$,$M_{c}$ = $25.6^{+7.1}_{-7.1} ~M_{\oplus}$,$M_{d}$ < $14.0~M_{\oplus} $ ~(95% conf.)第三颗恒星是一颗G矮星,被称为K2-24或EPIC~203771098,拥有两颗凌日行星(“b”,$5.7~R_{\oplus}$ ;“c”,$7.8~R_{\oplus}$),其轨道周期接近2:1。我们发现$M_{b}$ = $19.8^{+4.5}_{-4.4} ~M_{\oplus}$和$M_{c}$ = $26.0^{+5.8}_{-6.1}~M_{\oplus}$.

英文摘要:

In an effort to measure the masses of planets discovered by the NASA {\it K2} mission, we have conducted precise Doppler observations of five stars with transiting planets. We present the results of a joint analysis of these new data and previously published Doppler data. The first star, an M dwarf known as K2-3 or EPIC~201367065, has three transiting planets ("b", with radius $2.1~R_{\oplus}$; "c", $1.7~R_{\oplus}$; and "d", $1.5~R_{\oplus}$). Our analysis leads to the mass constraints: $M_{b}=8.1^{+2.0}_{-1.9}~M_{\oplus}$ and $M_{c}$ < $ 4.2~M_{\oplus}$~(95\%~conf.). The mass of planet d is poorly constrained because its orbital period is close to the stellar rotation period, making it difficult to disentangle the planetary signal from spurious Doppler shifts due to stellar activity. The second star, a G dwarf known as K2-19 or EPIC~201505350, has two planets ("b", $7.7~R_{\oplus}$; and "c", $4.9~R_{\oplus}$) in a 3:2 mean-motion resonance, as well as a shorter-period planet ("d", $1.1~R_{\oplus}$). We find $M_{b}$= $28.5^{+5.4}_{-5.0} ~M_{\oplus}$, $M_{c}$= $25.6^{+7.1}_{-7.1} ~M_{\oplus}$ and $M_{d}$ < $14.0~M_{\oplus} $~(95\%~conf.). The third star, a G dwarf known as K2-24 or EPIC~203771098, hosts two transiting planets ("b", $5.7~R_{\oplus}$; and "c", $7.8~R_{\oplus}$) with orbital periods in a nearly 2:1 ratio. We find $M_{b}$= $19.8^{+4.5}_{-4.4} ~M_{\oplus}$ and $M_{c}$ = $26.0^{+5.8}_{-6.1}~M_{\oplus}$.....

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑