Results 81 to 90 of about 22,763 (197)

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

The Small-Scale Physical Structure and Fragmentation Difference of Two Embedded Intermediate Mass Protostars in Orion [PDF]

, 2012
Intermediate-mass (IM) protostars, the bridge between the very common solar-like protostars and the more massive, but rarer, O and B stars, can only be studied at high physical spatial resolutions in a handful of clouds.
A. Fuente, Adams, Adams, Andrews, Arce, Bate, Bergin, Beuther, Beuther, Boss, Boss, Bottinelli, Brogan, Bruderer, Carrasco-González, Chambers, Cyganowski, D. Johnstone, De Buizer, Di Francesco, Dunham, Enoch, Evans, Gutermuth, Johnstone, Johnstone, Jørgensen, Klessen, Krumholz, Krumholz, Kuiper, Longmore, McKee, Ossenkopf, Pon, Ragan, Robitaille, Robitaille, S. N. Longmore, Sadavoy, Schnee, Seth, Shinnaga, Shirley, Shirley, Skinner, Stanke, Stojimirović, T. A. van Kempen, T. Pillai, Torrelles, Trinidad, Vorobyov, Vorobyov, Vázquez-Semadeni, Zavagno   +55 more
core   +2 more sources

Early Planet Formation in Embedded Disks (eDisk). III. A First High-resolution View of Submillimeter Continuum and Molecular Line Emission toward the Class 0 Protostar L1527 IRS

The Astrophysical Journal, 2023
Studying the physical and chemical conditions of young embedded disks is crucial to constrain the initial conditions for planet formation. Here we present Atacama Large Millimeter/submillimeter Array observations of dust continuum at ∼0.″06 (8 au ...
Merel L. R. van ’t Hoff, John J. Tobin, Zhi-Yun Li, Nagayoshi Ohashi, Jes K. Jørgensen, Zhe-Yu Daniel Lin, Yuri Aikawa, Yusuke Aso, Itziar de Gregorio-Monsalvo, Sacha Gavino, Ilseung Han, Patrick M. Koch, Woojin Kwon, Chang Won Lee, Jeong-Eun Lee, Leslie W. Looney, Suchitra Narayanan, Adele Plunkett, Jinshi Sai (Insa Choi), Alejandro Santamaría-Miranda, Rajeeb Sharma, Patrick D. Sheehan, Shigehisa Takakuwa, Travis J. Thieme, Jonathan P. Williams, Shih-Ping Lai, Nguyen Thi Phuong, Hsi-Wei Yen   +27 more
doaj   +1 more source

The Snow Border [PDF]

, 2011
Context. The study of the snow line is an important topic in several domains of astrophysics, and particularly for the evolution of proto-stellar environments and the formation of planets. Aims.
Cazaux, S., Marseille, M. G.
core   +3 more sources

Properties of the Youngest Protostars in Perseus, Serpens, and Ophiuchus [PDF]

, 2008
We present an unbiased census of deeply embedded protostars in Perseus, Serpens, and Ophiuchus, assembled by combining large-scale 1.1 mm Bolocam continuum and Spitzer Legacy surveys.
André, Anneila I. Sargent, Aspin, Cieza, Di Francesco, Dunham, Ebert, Enoch, Enoch, Enoch, Evans, Evans, Habets, Harvey, Harvey, Harvey, Indebetouw, Jason Glenn, Jayawardhana, Jeans, Jørgensen, Jørgensen, Jørgensen, Jørgensen, Kirk, Lada, Looney, Melissa L. Enoch, Merín, Myers, Natta, Neal J. Evans, Ossenkopf, Pringle, Rebull, Robitaille, Sandell, Shirley, Spezzi, Tassis, Vieira, Visser, Vorobyov, Walawender, Ward-Thompson, Whitney, Wu, Young, Young, Young   +49 more
core   +2 more sources

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

The Structure and Kinematics of Three Class 0 Protostellar Jets from JWST

The Astrophysical Journal
We present observations of jets within 2000 au of three deeply embedded protostars using 2.9–27 μ m observations with JWST. These observations show the morphologies and kinematics of the collimated jets from three protostars, the low-mass Class 0 ...
Samuel A. Federman, S. Thomas Megeath, Alessio Caratti o Garatti, Mayank Narang, Himanshu Tyagi, Neal J. Evans II, Carolin N. Kimmig, Łukasz Tychoniec, Henrik Beuther, Amelia Stutz, P. Manoj, Robert Gutermuth, Tyler L. Bourke, Joel Green, Lee Hartmann, Pamela Klaassen, Rolf Kuiper, Leslie W. Looney, Pooneh Nazari, Thomas Stanke, Dan M. Watson, Yao-Lun Yang, Wafa Zakri   +22 more
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

Chemical Evolution of Protostars [PDF]

Astrophysics and Space Science, 2005
This review discusses the evolution of the chemical composition of the molecular gas throughout the process of star formation. It covers the initial stages of cloud-core formation, gravitational collapse and the formation of the star, the effects of stellar radiation and outflows on the surrounding cloud, and the composition of the circumstellar disk ...
openaire   +1 more source