Results 11 to 20 of about 281 (168)

PROTOSTARS AND STARS IN THE CORONET CLUSTER: AGE, EVOLUTION, AND CLUSTER STRUCTURE [PDF]

The Astrophysical Journal, 2011
30 pages, 9 figures, 6 tables, ApJ in ...
Aurora Sicilia-Aguilar, Thomas K. Henning, Jouni Kainulainen, Veronica Roccatagliata   +3 more
openalex   +6 more sources

The Naming of Stars and the Study of Protostars [PDF]

International Astronomical Union Colloquium, 1993
AbstractThe logic of naming stars could be based more on physical principles as happened in the naming of resonances in Particle Physics. A possible system might be based on extensive Monte Carlo studies of protostars followed by standard Stellar Evolutionary Model calculations.
D.R.O. Morrison
openalex   +2 more sources

The Formation of Stars -- From Filaments to Cores to Protostars and Protoplanetry Disks [PDF]

, 2019
Star formation involves the flow of gas and dust within molecular clouds into protostars and young stellar objects (YSOs) due to gravity. Along the way, these flows are shaped significantly by many other mechanisms, including pressure, turbulent motions, magnetic fields, stellar feedback, jets, and angular momentum.
James Di Francesco, Helen Kirk, Doug Johnstone, Ralph E. Pudritz, Shantanu Basu, Sarah Sadavoy, Laura M. Fissel, L. B. G. Knee, Mehrnoosh Tahani, Rachel Friesen, Simon Coudé, Erik W. Rosolowsky, Nienke van der Marel, Michel Fich, C. D. Wilson, Christopher D. Matzner, Ruobing Dong, Brenda C. Matthews, Gerald Schieven   +18 more
openalex   +3 more sources

IRAS 18317−0757: A Cluster of Embedded Massive Stars and Protostars [PDF]

The Astrophysical Journal, 2004
We present high-resolution, multiwavelength continuum and molecular-line images of the massive star forming region IRAS 18317-0757. The IR through mm spectral energy distribution can be approximated by a two-temperature model (25 and 63 K) with a total luminosity of approximately log(L/Lsun)=5.2.
T. R. Hunter, Q. Zhang, T. K. Sridharan
openalex   +4 more sources

X-rays from jet-driving protostars and T Tauri stars [PDF]

Astronomy & Astrophysics, 2006
(abridged:) We study X-rays from jet-driving protostars and T Tau stars. We seek soft spectral components that may be due to shock emission, and shock-induced emission displaced from the stellar position. Two stellar samples are used, the first consisting of lightly absorbed T Tau stars with strong jets, the other containing protostars with disks seen ...
M. Güdel, A. Telleschi, M. Audard, Stephen L. Skinner, Kevin R. Briggs, F. Palla, Catherine Dougados   +6 more
openalex   +5 more sources

Disks and outflows around intermediate-mass stars and protostars [PDF]

Astronomy & Astrophysics, 2001
In order to study the existence and evolution of circumstellar disks around intermediate-mass stars (M 3M), we have obtained single-dish and interferometric continuum images at 2.6 mm and 1.3 mm of the intermediate-mass protostar NGC 7129 FIRS 2 and of the Herbig Be stars LkH 234 and HD 200775.
Asunción Fuente, R. Neri, Jesús Martín-Pintado, R. Bachiller, A. Rodríguez-Franco, F. Palla   +5 more
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How Do Stars Gain Their Mass? A JCMT/SCUBA-2 Transient Survey of Protostars in Nearby Star-forming Regions [PDF]

The Astrophysical Journal, 2017
Abstract Most protostars have luminosities that are fainter than expected from steady accretion over the protostellar lifetime. The solution to this problem may lie in episodic mass accretion—prolonged periods of very low accretion punctuated by short bursts of rapid accretion.
Gregory J. Herczeg, Doug Johnstone, Steve Mairs, J. Hatchell, Jeong‐Eun Lee, Geoffrey C. Bower, Huei-Ru Vivien Chen, Yuri Aikawa, Hyunju Yoo, Sung-Ju Kang, Miju Kang, Wen-Ping Chen, Jonathan P. Williams, Jaehan Bae, Michael M. Dunham, Eduard I. Vorobyov, Zhaohuan Zhu, Ramprasad Rao, Helen Kirk, Satoko Takahashi, Ó. Morata, Kevin Lacaille, James Lane, Andy Pon, A. Scholz, Manash Ranjan Samal, Graham Bell, Sarah Graves, E’lisa Lee, Harriet A. L. Parsons, Yuxin He, Jianjun Zhou, Mi-Ryang Kim, Scott Chapman, E. Drabek-Maunder, Eun Jung Chung, S. P. S. Eyres, Jan Forbrich, Lynne A. Hillenbrand, Shu‐ichiro Inutsuka, Gwanjeong Kim, Kyoung Hee Kim, Yi‐Jehng Kuan, Woojin Kwon, S. Lai, Bhavana Lalchand, Chang Won Lee, Chin‐Fei Lee, Feng Long, A-Ran Lyo, Lei Qian, Peter Scicluna, Archana Soam, Dimitris Stamatellos, Shigehisa Takakuwa, Ya‐Wen Tang, Hongchi Wang, Yi-Ren Wang   +57 more
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The Formation of Stars - From Filaments to Cores to Protostars and Protoplanetary Disks

, 2019
White paper identifier ...
Di Francesco, James, Kirk, Helen, Doug Johnstone, Ralph E. Pudritz, Basu, Shantanu, Sadavoy, Sarah, Fissel, Laura, Knee, Lewis, Mehrnoosh Tahani, Friesen, Rachel, Simon Coudé, Rosolowsky, Erik, van der Marel, Nienke, Fich, Michel, Wilson, Christine, Christopher D. Matzner, Dong, Ruobing, Matthews, Brenda, Schieven, Gerald   +18 more
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NMA Imaging of Envelopes and Disks around Low Mass Protostars and T Tauri Stars [PDF]

Symposium - International Astronomical Union, 1997
We are intensively studying low mass star formation with the radio telescopes at Nobeyama in Japan. Using both the Nobeyama 45 m dish equipped with a 2 × 2 array receiver and the Nobeyama Millimeter Array (NMA), we can cover a very wide spatial range from overall molecular clouds down to compact protoplanetary disks.
Yoshimi Kitamura, Masao Saito, Ryohei Kawabe, Kazuyoshi Sunada   +3 more
  +4 more sources

On the Similarity of FU Orionis Stars to Class I Protostars: Evidence from the Submillimeter [PDF]

The Astrophysical Journal Supplement Series, 2001
On the basis of analysis of new submillimeter maps of a sample of most known FU Orionis stars, we confirm that these stars are extremely young, more similar to Class I protostars than to Class II T Tauri stars. The submillimeter maps reveal that FU Orionis stars have accretion disks that are larger and contain an order of magnitude more mass than those
G. Sandell, David A. Weintraub
openalex   +2 more sources