التفاصيل البيبلوغرافية
| العنوان: |
14 Her: a likely case of planet-planet scattering |
| المؤلفون: |
Gagliuffi, Daniella C. Bardalez, Faherty, Jacqueline K., Li, Yiting, Brandt, Timothy D., Williams, Lauryn, Brandt, G. Mirek, Gelino, Christopher R. |
| سنة النشر: |
2021 |
| المجموعة: |
Astrophysics |
| مصطلحات موضوعية: |
Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Solar and Stellar Astrophysics |
| الوصف: |
In this Letter, we measure the full orbital architecture of the two-planet system around the nearby K0 dwarf 14 Herculis. 14 Her (HD 145675, HIP 79248) is a middle-aged ($4.6^{+3.8}_{-1.3}$ Gyr) K0 star with two eccentric giant planets identified in the literature from radial velocity (RV) variability and long-term trends. Using archival RV data from Keck/HIRES in concert with \textit{Gaia-Hipparcos} acceleration in the proper motion vector for the star, we have disentangled the mass and inclination of the b planet to ${9.1}_{-1.1}^{+1.0}$ $M_\mathrm{Jup}$ and ${32.7}_{-3.2}^{+5.3}$ degrees. Despite only partial phase coverage for the c planet's orbit, we are able to constrain its mass and orbital parameters as well to ${6.9}_{-1.0}^{+1.7}$ $M_\mathrm{Jup}$ and ${101}_{-33}^{+31}$ degrees. We find that coplanarity of the b and c orbits is strongly disfavored. Combined with the age of the system and the comparable masses of its planets, this suggests that planet-planet scattering may be responsible for the current configuration of the system. |
| نوع الوثيقة: |
Working Paper |
| DOI: |
10.3847/2041-8213/ac382c |
| URL الوصول: |
http://arxiv.org/abs/2111.06004 |
| رقم الانضمام: |
edsarx.2111.06004 |
| قاعدة البيانات: |
arXiv |