Zobrazeno 1 - 10
of 134
pro vyhledávání: '"Planetary system formation"'
Publikováno v:
The Astrophysical Journal Letters, Vol 973, Iss 1, p L4 (2024)
The distribution of small planet radius ( 0.35) exhibit a lower frequency of sub-Earths (2.5 times less) and sub-Neptunes (1.3 times less) and a higher frequency of super-Earths (1.4 times more) than planets in low-complexity systems. This may sugges
Externí odkaz:
https://doaj.org/article/fd49ee84118f4cea8a3cfcc6c4b12339
Autor:
Wenrui Xu, Songhu Wang
Publikováno v:
The Astrophysical Journal Letters, Vol 962, Iss 1, p L4 (2024)
In protoplanetary disks, sufficiently massive planets excite pressure bumps, which can then be preferred locations for forming new planet cores. We discuss how this loop may affect the architecture of multiplanet systems and compare our predictions w
Externí odkaz:
https://doaj.org/article/f94c985ee2434ae5a1fc1cbedf57937c
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 50 (2024)
Millimeter emitting dust grains have sizes that make them susceptible to drift in protoplanetary disks due to the difference between their orbital speed and that of the gas. The characteristic drift timescale depends on the surface density of the gas
Externí odkaz:
https://doaj.org/article/de29daac7cf1411c82b77bffa55ea1a0
Autor:
Marcus L. Marcussen, Simon H. Albrecht, Joshua N. Winn, Yubo Su, Mia S. Lundkvist, Kevin C. Schlaufman
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 149 (2024)
The degree of spin–orbit alignment in a population of binary stars can be determined from measurements of their orbital inclinations and rotational broadening of their spectral lines. Alignment in a face-on binary guarantees low rotational broadeni
Externí odkaz:
https://doaj.org/article/61e79ac6fb8c4f87902e37164b69d44d
Autor:
Huan-Yu Teng, Fei Dai, Andrew W. Howard, Howard Isaacson, Ryan A. Rubenzahl, Isabel Angelo, Alex S. Polanski
Publikováno v:
The Astronomical Journal, Vol 168, Iss 5, p 194 (2024)
We report the observation of the transiting planet TOI-942c, a Neptunian planet orbiting a young K-type star approximately 50 Myr years old. Using the Keck/High Resolution Echelle Spectrometer, we observed a partial transit of the planet and detected
Externí odkaz:
https://doaj.org/article/d48f18dc191945c98287b467aac05cb8
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 2, p 166 (2024)
The volatile inventories of planets depend on the precise partitioning of different volatiles between the gas and solid phases across the planet birth disk. For the case of hyper-volatiles (e.g., CO, N _2 , and noble gases), the partitioning also dep
Externí odkaz:
https://doaj.org/article/a650a78fad4e496db6a149f981e54d7b
Autor:
Christine H. Chen, Cicero X. Lu, Kadin Worthen, David R. Law, B. A. Sargent, Amaya Moro-Martin, G. C. Sloan, Carey M. Lisse, Dan M. Watson, Julien H. Girard, Yiwei Chai, Dean C. Hines, Jens Kammerer, Alexis Li, Marshall Perrin, Laurent Pueyo, Isabel Rebollido, Karl R. Stapelfeldt, Christopher Stark, Michael W. Werner
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 2, p 139 (2024)
Modeling observations of the archetypal debris disk around β Pic, obtained in 2023 January with the MIRI Medium Resolution Spectrograph on board JWST, reveals significant differences compared with that obtained with the Infrared Spectrograph on boar
Externí odkaz:
https://doaj.org/article/3e0cf6f67f8e4bc78f72ab06374bfc60
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 2, p 189 (2024)
The distribution of chemical species in protoplanetary disks around young stars, especially their division between gas and solid phases, fundamentally shapes the composition of future planets and planetesimals. This distribution is likely affected by
Externí odkaz:
https://doaj.org/article/27bdb376fe5a401cba417f73cf873eb7
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 2, p 152 (2024)
We investigate the migration of low-mass protoplanets embedded in dust–gas coupled protoplanetary disks. Linear calculations are performed with respect to the Nakagawa–Sekiya–Hayashi (NSH) equilibrium within a shearing sheet. We find that the d
Externí odkaz:
https://doaj.org/article/30edb825519c405d9895ab9f77f10131
Autor:
Briley L. Lewis, Michael P. Fitzgerald, Thomas M. Esposito, Pauline Arriaga, Ronald López, Katie A. Crotts, Gaspard Duchêne, Katherine B. Follette, Justin Hom, Paul Kalas, Brenda C. Matthews, Maxwell Millar-Blanchaer, David J. Wilner, Johan Mazoyer, Bruce Macintosh
Publikováno v:
The Astronomical Journal, Vol 168, Iss 4, p 142 (2024)
The 16 Myr old A0V star HD 156623 in the Scorpius–Centaurus association hosts a high-fractional-luminosity debris disk, recently resolved in scattered light for the first time by the Gemini Planet Imager (GPI) in polarized intensity only. We presen
Externí odkaz:
https://doaj.org/article/0fa81916c52849fba7b5e447e8486714