Revised Architecture and Two New Super-Earths in the HD 134606 Planetary System
In: The Astronomical Journal, Jg. 167 (2024), Heft 4, S. 155-155
Online
academicJournal
Zugriff:
Multiplanet systems exhibit a diversity of architectures that diverge from the solar system and contribute to the topic of exoplanet demographics. Radial velocity (RV) surveys form a crucial component of exoplanet surveys, as their long observational baselines allow for searches for more distant planetary orbits. This work provides a significantly revised architecture for the multiplanet system HD 134606 using both HARPS and UCLES RVs. We confirm the presence of previously reported planets b, c, and d with periods of ${12.0897}_{-0.0018}^{+0.0019}$ , ${58.947}_{-0.054}^{+0.056}$ , and ${958.7}_{-5.9}^{+6.3}$ days and masses of ${9.14}_{-0.63}^{+0.65}$ , 11.0 ± 1, and 44.5 ± 2.9 Earth masses, respectively, with the planet d orbit significantly revised to over double that originally reported. We report two newly detected super-Earths, e and f, with periods of ${4.31943}_{-0.00068}^{+0.00075}$ and ${26.9}_{-0.017}^{+0.019}$ days and masses of ${2.31}_{-0.35}^{+0.36}$ and ${5.52}_{-0.73}^{+0.74}$ Earth masses, respectively. In addition, we identify a linear trend in the RV time series, and the cause of this acceleration is deemed to be a newly detected massive companion with a very long orbital period. HD 134606 now displays four low-mass planets in a compact region near the star, one gas giant further out in the habitable zone, an additional companion in the outer regime, and a low-mass M dwarf stellar companion at large separation, making it an intriguing target for system formation/evolution studies. The location of planet d in the habitable zone proves to be an exciting candidate for future space-based direct imaging missions, whereas continued RV observations of this system are recommended for understanding the nature of the massive, long-period companion.
Titel: |
Revised Architecture and Two New Super-Earths in the HD 134606 Planetary System
|
---|---|
Autor/in / Beteiligte Person: | Li, Zhexing ; Kane, Stephen R. ; Brandt, Timothy D. ; Fetherolf, Tara ; Robertson, Paul ; Zhao, Jinglin ; Dalba, Paul A. ; Wittenmyer, Robert A. ; R. Paul Butler ; Díaz, Matías R. ; Howell, Steve B. ; Bailey, Jeremy ; Carter, Brad ; Furlan, Elise ; Gnilka, Crystal L. ; Horner, Jonathan ; Jones, Hugh R. A. ; O’Toole, Simon ; Tinney, Chris |
Link: | |
Zeitschrift: | The Astronomical Journal, Jg. 167 (2024), Heft 4, S. 155-155 |
Veröffentlichung: | IOP Publishing, 2024 |
Medientyp: | academicJournal |
ISSN: | 1538-3881 (print) |
DOI: | 10.3847/1538-3881/ad2461 |
Schlagwort: |
|
Sonstiges: |
|