Results 71 to 80 of about 24,969 (196)

Studying the Effect of Radiation Pressure on Evolution of a Population III Stellar Cluster

The Astrophysical Journal
Recent numerical simulations have shown that the unstable disk within the central regime of the primordial gas cloud fragments to form multiple protostars on several scales.
Sukalpa Kundu, Jayanta Dutta
doaj   +1 more source

Simulating the Collapse of Rotating Primordial Gas Clouds to Study the Possibility of the Survival of Population III Protostars

The Astrophysical Journal, 2023
It has been argued that the low-mass primordial stars ( m _Pop III ≤ 0.8 M _⊙ ) are likely to enter the main sequence and hence may possibly be found in present-day galaxies.
Shubham P. Raghuvanshi, Jayanta Dutta
doaj   +1 more source

Chemical tracers of episodic accretion in low-mass protostars [PDF]

, 2015
Aims: Accretion rates in low-mass protostars can be highly variable in time. Each accretion burst is accompanied by a temporary increase in luminosity, heating up the circumstellar envelope and altering the chemical composition of the gas and dust.
Bergin, Edwin A., Jorgensen, Jes K., Visser, Ruud   +2 more
core   +1 more source

Modeling Hadronic Gamma-Ray Emissions from Solar Flares and Prospects for Detecting Nonthermal Signatures from Protostars

The Astrophysical Journal, 2023
We investigate gamma-ray emission in the impulsive phase of solar flares and the detectability of nonthermal signatures from protostellar flares. Energetic solar flares emit high-energy gamma rays of GeV energies, but their production mechanism and ...
Shigeo S. Kimura, Shinsuke Takasao, Kengo Tomida   +2 more
doaj   +1 more source

Key Physical Parameters Influencing Fragmentation and Multiplicity in Dense Cores of Orion A

The Astrophysical Journal
When dense cores in molecular clouds or filamentary structures collapse and form protostars, they may undergo fragmentation and form binary or multiple systems.
Jo-Shui Kao, Hsi-Wei Yen, Shih-Ping Lai
doaj   +1 more source

Jets in Low-Mass Protostars

Universe
Jets and outflows are key components of low-mass star formation, regulating accretion and shaping the surrounding molecular clouds. These flows, traced by molecular species at (sub)millimeter wavelengths (e.g., CO, SiO, SO, H2CO, and CH3OH) and by atomic,
Somnath Dutta
doaj   +1 more source

Luminosity Functions of Spitzer Identified Protostars in Nine Nearby Molecular Clouds

, 2012
We identify protostars in Spitzer surveys of nine star-forming molecular clouds within 1 kpc: Serpens, Perseus, Ophiuchus, Chamaeleon, Lupus, Taurus, Orion, Cep OB3, and Mon R2, which combined host over 700 protostar candidates.
Allen, Allen, Brooke, Cohen, Cunningham, Dunham, Dunham, Dzib, E. Kryukova, Elmegreen, Enoch, Evans, Evans, Fazio, Flaherty, Furlan, Gutermuth, Gutermuth, Gutermuth, Gutermuth, Gutermuth, Hartmann, Hartmann, Harvey, Harvey, Hunter, J. Muzerolle, J. Pipher, Jijina, Kirk, L. E. Allen, Lada, Landsman, Luhman, Luhman, McClure, McKee, Megeath, Megeath, Megeath, Muzerolle, Myers, Myers, Offner, P. C. Myers, R. A. Gutermuth, Reid, Rieke, Robitaille, Román-Zúñiga, S. T. Megeath, Sadavoy, Swift, T. S. Allen, Testi, Vorobyov, Whitney, Whitney, Whitney, Wilson, Winston, Young   +61 more
core   +1 more source

Investigating Protostellar Accretion-driven Outflows across the Mass Spectrum: JWST NIRSpec Integral Field Unit 3–5 μm Spectral Mapping of Five Young Protostars

The Astrophysical Journal
Investigating Protostellar Accretion is a Cycle 1 JWST program using the NIRSpec+MIRI integral field units to obtain 2.9–28 μ m spectral cubes of five young protostars with luminosities of 0.2–10,000 L _⊙ in their primary accretion phase.
Samuel A. Federman, S. Thomas Megeath, Adam E. Rubinstein, Robert Gutermuth, Mayank Narang, Himanshu Tyagi, P. Manoj, Guillem Anglada, Prabhani Atnagulov, Henrik Beuther, Tyler L. Bourke, Nashanty Brunken, Alessio Caratti o Garatti, Neal J. Evans II, William J. Fischer, Elise Furlan, Joel D. Green, Nolan Habel, Lee Hartmann, Nicole Karnath, Pamela Klaassen, Hendrik Linz, Leslie W. Looney, Mayra Osorio, James Muzerolle Page, Pooneh Nazari, Riwaj Pokhrel, Rohan Rahatgaonkar, Will R. M. Rocha, Patrick Sheehan, Katerina Slavicinska, Thomas Stanke, Amelia M. Stutz, John J. Tobin, Lukasz Tychoniec, Ewine F. Van Dishoeck, Dan M. Watson, Scott Wolk, Yao-Lun Yang   +38 more
doaj   +1 more source

The infrared Galactic disk: What have we learned?

EPJ Web of Conferences, 2012
A brief overview is given of some of the new insights we have achieved from the Spitzer/GLIMPSE/MIPSGAL surveys of the Galactic plane. Particular emphasis is given to infrared bubbles, rapidly accreting protostars, infrared dark clouds, and diffuse PAH ...
Churchwell E.
doaj   +1 more source

Tracking Star-forming Cores as Mass Reservoirs in Clustered and Isolated Regions Using Numerical Passive Tracer Particles

The Astrophysical Journal
Understanding the physical properties of star-forming cores as mass reservoirs for protostars and the impact of turbulence is crucial in star formation studies.
Shingo Nozaki, Hajime Fukushima, Kazuki Tokuda, Masahiro N. Machida   +3 more
doaj   +1 more source