scholarly journals The standard model of low-mass star formation applied to massive stars: a multi-wavelength picture of AFGL 2591

2013 ◽  
Vol 551 ◽  
pp. A43 ◽  
Author(s):  
K. G. Johnston ◽  
D. S. Shepherd ◽  
T. P. Robitaille ◽  
K. Wood
Keyword(s):  
Star Formation ◽  
Standard Model ◽  
Massive Stars ◽  
Mass Star ◽  
The Standard Model ◽  
Multi Wavelength ◽  
Low Mass

scholarly journals Star Formation in Young Cluster NGC 1893

2007 ◽  
Vol 3 (S246) ◽  
pp. 73-74
Author(s):  
Saurabh Sharma ◽  
A. K. Pandey ◽  
D. K. Ojha ◽  
W. P. Chen ◽  
S. K. Ghosh ◽  
...  
Keyword(s):  
Star Formation ◽  
Narrow Band ◽  
Massive Stars ◽  
Broad Band ◽  
Archival Data ◽  
Mass Star ◽  
Star Forming ◽  
Multi Wavelength ◽  
Low Mass

AbstractWe have carried out a multi-wavelength study of the star forming region NGC 1893 to make a comprehensive exploration of the effects of massive stars on low mass star formation. Using deep optical U BV RI broad band, Hα narrow band photometry and slit-less spectroscopy along with archival data from the surveys such as 2MASS, MSX, IRAS and NVSS, we have studied the region to understand the star formation scenario in the region.

scholarly journals Testing the Paradigm of Low Mass Star Formation

2004 ◽  
Vol 221 ◽  
pp. 201-212
Author(s):  
Lee Hartmann
Keyword(s):  
Star Formation ◽  
Magnetic Fields ◽  
Standard Model ◽  
Molecular Clouds ◽  
Class I ◽  
Stellar Systems ◽  
Mass Star ◽  
Core Formation ◽  
The Standard Model ◽  
Low Mass

Protostellar core formation is probably much more dynamic, and magnetic fields are probably much less important, than has been previously assumed in the standard model of low-mass star formation. This revised picture has important consequences: it is easier to understand the observed rapidity of star formation in molecular clouds; cores are more likely to have structures favoring high infall rates at early times, helping to explain the differences between Class 0 and Class I protostars; and core structure and asymmetry will strongly favor post-collapse fragmentation into binary and multiple stellar systems.

scholarly journals Constraining How Star Formation Proceeds: Surveys in the Sub-mm and FIR

2009 ◽  
Vol 5 (H15) ◽  
pp. 406-407
Author(s):  
Doug Johnstone
Keyword(s):  
Star Formation ◽  
Molecular Clouds ◽  
Mass Star ◽  
Star Forming ◽  
Physical Conditions ◽  
Star Forming Regions ◽  
Dense Cores ◽  
Multi Wavelength ◽  
Low Mass ◽  
High Column

AbstractCoordinated multi-wavelength surveys of molecular clouds are providing strong constraints on the physical conditions within low-mass star-forming regions. In this manner, Perseus and Ophiuchus have been exceptional laboratories for testing the earliest phases of star formation. Highlights of these results are: (1) dense cores form only in high column density regions, (2) dense cores contain only a few percent of the cloud mass, (3) the mass distribution of the dense cores is similar to the IMF, (4) the more massive cores are most likely to contain embedded protostars, and (5) the kinematics of the dense cores and the bulk gas show significant coupling.

scholarly journals Star Formation in the Early Universe

2011 ◽  
Vol 7 (S279) ◽  
pp. 216-223
Author(s):  
Kazuyuki Omukai
Keyword(s):  
Star Formation ◽  
Thermal Evolution ◽  
Massive Stars ◽  
Solar Neighborhood ◽  
Mass Star ◽  
Metal Enrichment ◽  
Lower Mass ◽  
Low Metallicity ◽  
Low Mass ◽  
The Universe

AbstractIn low-metallicity environments, massive stars are more easily formed than in the solar neighborhood. In this article, we see the following examples of low-mass star formation. We first describe the first star formation in the universe and argue that they are typically ordinary-sized massive stars, rather than very massive (> 100M⊙) ones. Next, we see how the metal-enrichment changes the thermal evolution of gas, thereby causing the shift of characteristic stellar mass towards lower mass. Finally, we discuss the possibility of forming supermassive stars in some special conditions in young galaxies.

Low‐Mass Star Formation and the Initial Mass Function in IC 348

1998 ◽  
Vol 508 (1) ◽  
pp. 347-369 ◽  
Author(s):  
K. L. Luhman ◽  
G. H. Rieke ◽  
C. J. Lada ◽  
E. A. Lada
Keyword(s):  
Star Formation ◽  
Mass Function ◽  
Initial Mass Function ◽  
Initial Mass ◽  
Mass Star ◽  
Low Mass

scholarly journals The effect of episodic accretion on the phase transition of CO and CO2in low-mass star formation

2013 ◽  
Vol 557 ◽  
pp. A35 ◽  
Author(s):  
Eduard I. Vorobyov ◽  
Isabelle Baraffe ◽  
Tim Harries ◽  
Gilles Chabrier
Keyword(s):  
Phase Transition ◽  
Star Formation ◽  
Mass Star ◽  
Low Mass

scholarly journals Resurrecting low-mass axion dark matter via a dynamical QCD scale

2021 ◽  
Vol 2021 (12) ◽  
Author(s):  
Lucien Heurtier ◽  
Fei Huang ◽  
Tim M.P. Tait
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Temperature Dependent ◽  
Axion Field ◽  
Wide Range ◽  
The Standard Model ◽  
Low Mass ◽  
Higher Temperature ◽  
Relic Abundance ◽  
Dependent Mass

Abstract In the framework where the strong coupling is dynamical, the QCD sector may confine at a much higher temperature than it would in the Standard Model, and the temperature-dependent mass of the QCD axion evolves in a non-trivial way. We find that, depending on the evolution of ΛQCD, the axion field may undergo multiple distinct phases of damping and oscillation leading generically to a suppression of its relic abundance. Such a suppression could therefore open up a wide range of parameter space, resurrecting in particular axion dark-matter models with a large Peccei-Quinn scale fa ≫ 1012 GeV, i.e., with a lighter mass than the standard QCD axion.

scholarly journals FEEDBACK EFFECTS ON LOW-MASS STAR FORMATION

2012 ◽  
Vol 747 (1) ◽  
pp. 22 ◽  
Author(s):  
Charles E. Hansen ◽  
Richard I. Klein ◽  
Christopher F. McKee ◽  
Robert T. Fisher
Keyword(s):  
Star Formation ◽  
Mass Star ◽  
Feedback Effects ◽  
Low Mass
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