Results 11 to 20 of about 4,213,215 (189)

Formation and Evolution of Disks Around Young Stellar Objects. [PDF]

Space Sci Rev, 2020
AbstractRecent observations have suggested that circumstellar disks may commonly form around young stellar objects. Although the formation of circumstellar disks can be a natural result of the conservation of angular momentum in the parent cloud, theoretical studies instead show disk formation to be difficult from dense molecular cores magnetized to a ...
Zhao B, Tomida K, Hennebelle P, Tobin JJ, Maury A, Hirota T, Sánchez-Monge Á, Kuiper R, Rosen A, Bhandare A, Padovani M, Lee YN.   +11 more
europepmc   +9 more sources

Kinematics of Young Stellar Objects under Various Stellar Feedback

The Astrophysical Journal Supplement Series
Based on the Gaia Data Release 3 and APOGEE data sets, we investigate the kinematic differences between young stellar objects (YSOs) and their parent clouds in five nearby star-forming regions.
Longhui Yang, Dejian Liu, Chaojie Hao, Zehao Lin, YingJie Li, Yiwei Dong, Zu-Jia Lu, En-Wei Liang, Y. Xu   +8 more
doaj   +3 more sources

Binarity in massive young stellar objects

, 2021
Most massive stars (up to 100%) are thought to be in binary systems. The multiplicity of massive stars seems to be intrinsically linked to their formation and evolution, and so Massive Young Stellar Objects are key in observing this early stage of star formation.
Shenton, Robert
openaire   +2 more sources

The magnetic environments of young stellar objects

Astrophysics and Space Science, 2004
We report on early results of magnetic field measurements towards a sample of young stellar objects. The results show a variety of field configurations, some of which can be explained by conventional models, while others cannot. We find that the field in some cases is curved over large scales and influenced by the gas kinematics in the local ...
Antonio Chrysostomou, Rachel Curran, David Aitken   +2 more
core   +8 more sources

Modelling and observations of molecules in discs around young stars [PDF]

, 2013
This thesis contains a study of molecules within circumstellar discs around young stars. Firstly, the chemistry of a disc around a young, Class 0 protostar is modelled.
Ilee, John David
core   +6 more sources

A Framework for Modeling the Evolution of Young Stellar Objects

The Astrophysical Journal
Measuring properties of young stellar objects (YSOs) is necessary for probing the pre-main-sequence evolution of stars. As YSOs exhibit complex geometry, measurement generally entails comparing observed radiation to template populations of radiative ...
Theo Richardson, Adam Ginsburg, Erik Rosolowsky, Joshua Peltonen, Rémy Indebetouw   +4 more
doaj   +3 more sources

Outbursts of young stellar objects [PDF]

Monthly Notices of the Royal Astronomical Society, 2004
We argue that the outbursts of the FU Orionis stars occur on timescales which are much longer than expected from the standard disc instability model with α_{c} \gtrsim 10^{-3}. The outburst, recurrence, and rise times are consistent with the idea that the accretion disc in these objects is truncated at a radius R_{i} \sim 40 \rsun.
Matthews, OM, Speith, R, Wynn, GA
openaire   +3 more sources

YOUNG STELLAR OBJECTS IN THE GOULD BELT [PDF]

The Astrophysical Journal Supplement Series, 2015
We present the full catalog of Young Stellar Objects (YSOs) identified in the 18 molecular clouds surveyed by the Spitzer Space Telescope "cores to disks" (c2d) and "Gould Belt" (GB) Legacy surveys. Using standard techniques developed by the c2d project, we identify 3239 candidate YSOs in the 18 clouds, 2966 of which survive visual inspection and form ...
Dunham, Miranda M., Allen, Lori E., Evans, Neal J., II, Broekhoven-Fiene, Hannah, Cieza, Lucas A., Di Francesco, James, Gutermuth, Robert A., Harvey, Paul M., Hatchell, Jennifer, Heiderman, Amanda, Huard, Tracy L., Johnstone, Doug, Kirk, Jason M., Matthews, Brenda C., Miller, Jennifer F., Peterson, Dawn E., Young, Kaisa E.   +16 more
openaire   +3 more sources

YOUNG STELLAR CLUSTERS CONTAINING MASSIVE YOUNG STELLAR OBJECTS IN THE VVV SURVEY [PDF]

The Astronomical Journal, 2016
ABSTRACT The purpose of this research is to study the connections of the global properties of eight young stellar clusters projected in the Vista Variables in the Via Lactea (VVV) ESO Large Public Survey disk area and their young stellar object (YSO) populations.
J. Borissova, S. Ramírez Alegría, J. Alonso, P. W. Lucas, R. Kurtev, N. Medina, C. Navarro, M. Kuhn, M. Gromadzki, G. Retamales, M. A. Fernandez, C. Agurto-Gangas, A.-N. Chené, D. Minniti, C. Contreras Pena, M. Catelan, I. Decany, M. A. Thompson, E. F. E. Morales, P. Amigo   +19 more
openaire   +5 more sources

Young stellar objects close to Sgr A* [PDF]

Proceedings of the International Astronomical Union, 2013
AbstractWe aim at modeling small groups of young stars such as IRS 13N, 0.1 pc away from Sgr A*, which is suggested to contain a few embedded massive young stellar objects. We perform hydrodynamical simulations to follow the evolution of molecular clumps orbiting around a 4 × 106 M⊙ black hole, to constrain the formation and the physical conditions of ...
B. Jalali, F. I. Pelupessy, A. Eckart, S. Portegies Zwart, N. Sabha, A. Borkar, J. Moultaka, K. Mužić, L. Moser   +8 more
openaire   +2 more sources