Results 91 to 100 of about 2,834 (210)

Direct Spectroscopic Confirmation of the Young Embedded Protoplanet WISPIT 2c

The Astrophysical Journal Letters
WISPIT 2 is a nearby young star with a multiringed disk that was recently confirmed to host a ∼4.9 M _Jup gas giant planet embedded in a large (60 au) gap at a radial separation of 57 au from the host star.
Chloe Lawlor, Richelle F. van Capelleveen, Guillaume Bourdarot, Christian Ginski, Matthew A. Kenworthy, Tomas Stolker, Laird Close, Alexander J. Bohn, Frank Eisenhauer, Paulo Garcia, Sebastian F. Hönig, Jens Kammerer, Laura Kreidberg, Sylvestre Lacour, Jean-Baptiste Le Bouquin, Eric Mamajek, Mathias Nowak, Thibaut Paumard, Christian Straubmeier, Nienke van der Marel, The ExoGRAVITY Collaboration   +20 more
doaj   +1 more source

The effect of gas drag on the growth of protoplanets -- Analytical expressions for the accretion of small bodies in laminar disks

, 2010
Planetary bodies form by accretion of smaller bodies. It has been suggested that a very efficient way to grow protoplanets is by accreting particles of size
Birnstiel, Blum, Brauer, Brunini, C. W. Ormel, Carballido, Chambers, Chambers, Ciesla, Cuzzi, Dominik, Dubrulle, Goldreich, Greenberg, Greenzweig, Greenzweig, H. H. Klahr, Hill, Hubickyj, Ida, Ida, Inaba, Inaba, Johansen, Johansen, Johansen, Johansen, Kary, Kary, Kenyon, Kobayashi, Kokubo, Kokubo, Leinhardt, Levison, Lommen, Muto, Nakagawa, Nakazawa, Ohtsuki, Ormel, Paardekooper, Petit, Pollack, Rafikov, Ricci, Sekiya, Shakura, Shampine, Tanaka, Tanigawa, Weidenschilling, Weidenschilling, Weidenschilling, Weidenschilling, Weidenschilling, Wetherill, Wetherill, Wurm, Youdin   +59 more
core   +1 more source

Dual-band Observations of the Asymmetric Ring around CIDA 9A: Dead or Alive?

The Astrophysical Journal
While the most exciting explanation of the observed dust asymmetries in protoplanetary disks is the presence of protoplanets, other mechanisms can also form the dust features.
Daniel Harsono, Feng Long, Paola Pinilla, Alessia A. Rota, Carlo F. Manara, Gregory J. Herczeg, Doug Johnstone, Giovanni Rosotti, Giuseppe Lodato, Francois Menard, Marco Tazzari, Yangfan Shi   +11 more
doaj   +1 more source

Streaming Torque in Dust–Gas Coupled Protoplanetary Disks

The Astrophysical Journal
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 dusty quasi-
Qiang Hou, Cong Yu
doaj   +1 more source

Large Amplitude Photometric Variability of the Candidate Protoplanet TMR-1C

, 2010
In their HST/NICMOS observations, Terebey et al. 1998 detected a candidate protoplanet, TMR-1C, that lies at a separation of about 10" (~1000 AU) from the Class I protobinary TMR-1 (IRAS 04361+2547).
Allard, B. Riaz, Barrado y Navascués, Barrado y Navascués, Bate, Bouvier, Béjar, Caballero, Caballero, Carpenter, Carpenter, Close, Comerón, Doppmann, Ducourant, E. L. Martín, Hawkins, Kama, Kraus, Kusakabe, Luhman, Luhman, Luhman, Marley, Martín, Minniti, Park, Persson, Scholz, Scholz, Terebey, Terebey, Terebey, Winn, Zapatero Osorio, Zapatero Osorio   +35 more
core   +1 more source

Planet formation around stars of various masses: Hot super-Earths

, 2008
We consider trends resulting from two formation mechanisms for short-period super-Earths: planet-planet scattering and migration. We model scenarios where these planets originate near the snow line in ``cold finger'' circumstellar disks.
Grant M. Kennedy, Scott J. Kenyon, Weidenschilling S. J.   +2 more
core   +1 more source

Disc-protoplanet interaction Influence of circumprimary radiative discs on self-gravitating protoplanetary bodies in binary star systems

, 2014
Context. More than 60 planets have been discovered so far in systems that harbour two stars, some of which have binary semi-major axes as small as 20 au. It is well known that the formation of planets in such systems is strongly influenced by the stellar
Eggl, S., Gyergyovits, M., Lohinger, E. Pilat -, Theis, Ch.   +3 more
core   +3 more sources

Imaging Giant Protoplanets with the ELTs

, 2019
Science white paper submitted to the Astro2020 Decadal ...
Sallum, Steph, Bailey, Vanessa P., Bernstein, Rebecca A., Boss, Alan P., Bowler, Brendan P., Close, Laird, Currie, Thayne, Dong, Ruobing, Espaillat, Catherine, Fitzgerald, Michael P., Follette, Katherine B., Fortney, Jonathan, Hasegawa, Yasuhiro, Jang-Condell, Hannah, Jovanovic, Nemanja, Kane, Stephen R., Konopacky, Quinn, Liu, Michael, Lozi, Julien, Males, Jared, Mawet, Dimitri, Mazin, Benjamin, Millar-Blanchaer, Max, Murray-Clay, Ruth, Ruane, Garreth, Skemer, Andrew, Tamura, Motohide, Vasisht, Gautam, Wang, Jason, Wang, Ji   +29 more
openaire   +2 more sources

Protoplanet and Proto-Brown Dwarf Clumps in Gravitationally Unstable Protoplanetary Disks of Various Metallicity

Universe
Gravitational fragmentation of a protoplanetary disk is considered a possible mechanism for the formation of planets and brown dwarfs. In this process, transitory objects are formed that are known as clumps, which are compact gas–dust condensations with ...
Eduard Vorobyov, Carina Schoenhacker
doaj   +1 more source

Planet formation around stars of various masses: The snow line and the frequency of giant planets

, 2007
We use a semi-analytic circumstellar disk model that considers movement of the snow line through evolution of accretion and the central star to investigate how gas giant frequency changes with stellar mass.
Grant M. Kennedy, Lynden-Bell D., Nakano T., Nakano T., Nakano T., Podolak M., Scott J. Kenyon, Weidenschilling S. J.   +7 more
core   +1 more source