Results 41 to 50 of about 13,657 (239)

Pulsed accretion in a variable protostar [PDF]

Nature, 2013
Periodic increases in luminosity arising from variable accretion rates have been predicted for some close pre-main sequence binary stars as they grow from circumbinary disks. The phenomenon is known as "pulsed accretion" and can affect the orbital evolution and mass distribution of young binaries, as well as the potential for planet formation in the ...
Muzerolle, James, Furlan, Elise, Flaherty, Kevin, Balog, Zoltan, Gutermuth, Robert   +4 more
openaire   +3 more sources

Continuum Variability of Deeply Embedded Protostars as a Probe of Envelope Structure [PDF]

, 2013
Stars may be assembled in large growth spurts, however the evidence for this hypothesis is circumstantial. Directly studying the accretion at the earliest phases of stellar growth is challenging because young stars are deeply embedded in optically thick ...
Bruderer, Simon, Hendricks, Benjamin, Herczeg, Gregory J., Johnstone, Doug   +3 more
core   +1 more source

Luminosity Outburst of a High-mass Young Stellar Object Triggered by the Surrounding Radiation Field

The Astrophysical Journal Letters, 2023
We present observations of the 6.7 GHz methanol and 4.8 GHz formaldehyde masers toward the high-mass young stellar object G24.33+0.14 (hereafter G24). Our observations were conducted from 2019 to 2021 using the Shanghai Tianma 65 m Radio Telescope and ...
Jun-Ting Liu, Xi Chen, Xiao-Dian Chen, Zhi-Wei Chen, Shi-Min Song, You-Xin Wang, Yan-Kun Zhang, Zhang Zhao, Bin Li, Bo Xia, Zhi-Qiang Shen   +10 more
doaj   +1 more source

Mass and luminosity evolution of young stellar objects

, 2012
A model of protostar mass and luminosity evolution in clusters gives new estimates of cluster age, protostar birthrate, accretion rate and mean accretion time.
Allen, Allen, Bally, Baraffe, Beerer, Bonnell, Bressert, Briceño, Burkert, Cunningham, Da Rio, De Marchi, Dunham, Dunham, Enoch, Enoch, Evans, Gorlova, Gutermuth, Gutermuth, Harvey, Harvey, Hosokawa, Huff, Huff, Jørgensen, Kirk, Koenig, Krumholz, Kryukova, Lee, Li, Luhman, Luhman, Luhman, Masiunas, McKee, McKee, Muench, Myers, Myers, Myers, Myers, Myers, Nakamura, Offner, Offner, Palla, Peterson, Philip C. Myers, Pudritz, Ridge, Tan, Teixeira, Terebey, Wang, Winston, Winston, Wolk   +58 more
core   +1 more source

A VLA search for young protostars embedded in dense cores [PDF]

, 2006
Four dense cores, L1582A, L1689A, B133 and B68, classified as prestellar in terms of the absence of detectable NIR emission, are observed at radio wavelengths to investigate whether they nurture very young protostars.
A. P. Whitworth, André, André, André, André, André, Anglada, Beltrán, Bontemps, Bontemps, Bourke, Bourke, Cassen, Condon, Condon, Curiel, Curiel, Curiel, D. Stamatellos, D. Ward-Thompson, Dame, Douglas, Eiroa, Feigelson, Goodwin, Griffith, Harvey, Huard, Kirk, Leous, Martin, Myers, Neufeld, Neufeld, Nutter, Raga, Rodríguez, Rodríguez, Rodríguez, S. Bontemps, Stamatellos, Stamatellos, Ward-Thompson, Ward-Thompson, Ward-Thompson, Winkler, Young   +46 more
core   +6 more sources

Hourglass Magnetic Field of a Protostellar System

Universe
An hourglass-shaped magnetic field pattern arises naturally from the gravitational collapse of a star-forming gas cloud. Most studies have focused on the prestellar collapse phase, when the structure has a smooth and monotonic radial profile.
Shantanu Basu, Xiyuan Li, Gianfranco Bino   +2 more
doaj   +1 more source

Episodic accretion, protostellar radiative feedback, and their role in low-mass star formation

, 2012
Protostars grow in mass by accreting material through their discs, and this accretion is initially their main source of luminosity. The resulting radiative feedback heats the environments of young protostars, and may thereby suppress further ...
Hubber, David A., Stamatellos, Dimitris, Whitworth, Anthony P.   +2 more
core   +1 more source

Star Formation Under the Outflow: The Discovery of a Non-Thermal Jet from OMC-2 FIR 3 and its Relationship to the Deeply Embedded FIR 4 Protostar [PDF]

, 2017
We carried out multiwavelength (0.7-5 cm), multiepoch (1994-2015) Very Large Array (VLA) observations toward the region enclosing the bright far-IR sources FIR 3 (HOPS 370) and FIR 4 (HOPS 108) in OMC-2. We report the detection of 10 radio sources, seven
Anglada, Guillem, Carrasco-Gonzalez, Carlos, Diaz-Rodriguez, Ana K., Fischer, William J., Furlan, Elise, Gomez, Jose F., Gonzalez-Garcia, Beatriz, Loinard, Laurent, Manoj, P., Megeath, S. Thomas, Osorio, Mayra, Rodriguez, Luis F., Stanke, Thomas, Stutz, Amelia M., Tobin, John J., Vavrek, Roland, Watson, Dan M.   +16 more
core   +4 more sources

JWST Peers into the Class I Protostar TMC1A: Atomic Jet and Spatially Resolved Dissociative Shock Region

The Astrophysical Journal Letters, 2023
Outflows and winds launched from young stars play a crucial role in the evolution of protostars and the early stages of planet formation. However, the specific details of the mechanism behind these phenomena, including how they affect the protoplanetary ...
D. Harsono, P. Bjerkeli, J. P. Ramsey, K. M. Pontoppidan, L. E. Kristensen, J. K. Jørgensen, H. Calcutt, Z-Y. Li, A. Plunkett   +8 more
doaj   +1 more source

The Origin of Episodic Accretion Bursts in the Early Stages of Star Formation

, 2005
We study numerically the evolution of rotating cloud cores, from the collapse of a magnetically supercritical core to the formation of a protostar and the development of a protostellar disk during the main accretion phase.
Clarke C. J., E. I. Vorobyov, Lynden-Bell D., Shakura N. I., Shantanu Basu   +4 more
core   +1 more source