Results 91 to 100 of about 25,277 (239)

First sample of N₂H⁺ nitrogen isotopic ratio measurements in low-mass protostars [PDF]

, 2020
E. Redaelli, L. Bizzocchi, P. Caselli
openalex   +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

Disk Wind Feedback from High-mass Protostars. IV. Shock-ionized Jets

The Astrophysical Journal
Massive protostars launch accretion-powered, magnetically collimated outflows, which play crucial roles in the dynamics and diagnostics of the star formation process. Here we calculate the shock heating and resulting free–free radio emission in numerical
Emiko C. Gardiner, Jonathan C. Tan, Jan E. Staff, Jon P. Ramsey, Yichen Zhang, Kei E. I. Tanaka   +5 more
doaj   +1 more source

ngVLA Synthetic Observations of Ionized Gas in Massive Protostars

The Astrophysical Journal
Massive-star formation involves significant ionization in the innermost regions near the central object, such as gravitationally trapped H ii regions, jets, ionized disks, or winds. Resolved observations of the associated continuum and recombination line
Jesús M. Jáquez-Domínguez, Roberto Galván-Madrid, Alfonso Trejo-Cruz, Carlos Carrasco-González, Jacopo Fritz, Susana Lizano, Aina Palau, Andrés F. Izquierdo, Luis F. Rodríguez, Alice Pasetto, Stanley Kurtz, Thomas Peters, Eric F. Jiménez-Andrade, Luis A. Zapata   +13 more
doaj   +1 more source

The Effects of Accretion Luminosity upon Fragmentation in the Early Universe

, 2011
We introduce a prescription for the luminosity from accreting protostars into smoothed particle hydrodynamics simulation, and apply the method to simulations of five primordial minihalos generated from cosmological initial conditions.
Abel, Abel, Abel, Alvarez, Bate, Bate, Bate, Chabrier, Clark, Clark, Dalgarno, Federrath, Freese, Fryer, Galli, Glover, Glover, Glover, Glover, Heger, Hosokawa, Jappsen, Johnson, Kitayama, Kitsionas, Kroupa, Krumholz, Lodato, Machida, Mayer, McGreer, Nelson, Omukai, Omukai, Omukai, Omukai, Paul C. Clark, Peters, Peters, Peters, Pringle, Ralf S. Klessen, Reipurth, Ripamonti, Ripamonti, Ripamonti, Rowan J. Smith, Simon C. O. Glover, Sokasian, Spolyar, Spolyar, Springel, Springel, Stacy, Stahler, Tan, Thomas Greif, Turk, Turk, Whalen, Yoshida, Yoshida, Yoshida   +62 more
core   +1 more source

Infall-Driven Protostellar Accretion and the Solution to the Luminosity Problem

, 2014
We investigate the role of mass infall in the formation and evolution of protostars. To avoid ad hoc initial and boundary conditions, we consider the infall resulting self-consistently from modeling the formation of stellar clusters in turbulent ...
Haugbølle, Troels, Nordlund, Åke, Padoan, Paolo   +2 more
core   +1 more source

Protostellar Disk Formation Regimes: Angular Momentum Conservation versus Magnetic Braking

The Astrophysical Journal Letters
Protostellar disks around young protostars exhibit diverse properties, with their radii ranging from less than ten to several hundred astronomical units.
Hsi-Wei Yen, Yueh-Ning Lee
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

Theory of Disk Accretion onto Magnetic Stars

EPJ Web of Conferences, 2014
Disk accretion onto magnetic stars occurs in a variety of systems, including accreting neutron stars (with both high and low magnetic fields), white dwarfs, and protostars.
Lai Dong
doaj   +1 more source

Effect of Magnetic Field on the Accretion Phase of Population III Star Formation

The Astrophysical Journal
We examine the impact of the magnetic field on Population III star formation by varying its strength. We perform simulations with magnetic field strengths ranging from 10 ^−20 G to 10 ^−4 G, in addition to a model without a magnetic field.
Masahiro N. Machida, Shingo Hirano, Shantanu Basu   +2 more
doaj   +1 more source