Results 41 to 50 of about 22,863 (213)

Star Formation triggered by cloud-cloud collisions [PDF]

, 2015
We present the results of SPH simulations in which two clouds, each having mass $M_{_{\rm{o}}}\!=\!500\,{\rm M}_{_\odot}$ and radius $R_{_{\rm{o}}}\!=\!2\,{\rm pc}$, collide head-on at relative velocities of $\Delta v_{_{\rm{o}}} =2.4,\;2.8,\;3.2,\;3.6\;{
Balfour, S. K., Hubber, D. A., Jaffa, S. E., Whitworth, A. P.   +3 more
core   +2 more sources

An empirical model for protostellar collapse [PDF]

, 2000
We propose a new analytic model for the initial conditions of protostellar collapse in relatively isolated regions of star formation. The model is non-magnetic, and is based on a Plummer-like radial density profile as its initial condition.
Ward-Thompson, D., Whitworth, A. P.
core   +2 more sources

Observations of phosphorus-bearing molecules in the interstellar medium

Frontiers in Astronomy and Space Sciences
The chemistry of phosphorus (31P) in space is particularly significant due to the key role it plays in biochemistry on Earth. Utilising radio and infrared spectroscopic observations, several key phosphorus-containing molecules have been detected in ...
Francesco Fontani, Francesco Fontani, Francesco Fontani   +2 more
doaj   +1 more source

Early Planet Formation in Embedded Disks (eDisk). X. Compact Disks, Extended Infall, and a Fossil Outburst in the Class I Oph IRS43 Binary

The Astrophysical Journal, 2023
We present the first results from the Early Planet Formation in Embedded Disks Atacama Large Millimeter/submillimeter Array Large Program toward Oph IRS43, a binary system of solar mass protostars. The 1.3 mm dust continuum observations resolve a compact
Suchitra Narayanan, Jonathan P. Williams, John J. Tobin, Jes K. Jørgensen, Nagayoshi Ohashi, Zhe-Yu Daniel Lin, Merel L. R. van’t Hoff, Zhi-Yun Li, Adele L. Plunkett, Leslie W. Looney, Shigehisa Takakuwa, Hsi-Wei Yen, Yusuke Aso, Christian Flores, Jeong-Eun Lee, Shih-Ping Lai, Woojin Kwon, Itziar de Gregorio-Monsalvo, Rajeeb Sharma, Chang Won Lee   +19 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
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Formation of Primordial Protostars [PDF]

, 1998
The evolution of collapsing metal free protostellar clouds is investigated for various masses and initial conditions. We perform hydrodynamical calculations for spherically symmetric clouds taking account of radiative transfer of the molecular hydrogen
Carlberg R. G., Fukugita M., Hummer D. H., Kazuyuki Omukai, Larson R. B., Low C., Penston M. V., Rees M. J., Ryoichi Nishi, Yoneyama T.   +9 more
core   +2 more sources

Characterizing the Youngest Herschel-detected Protostars I. Envelope Structure Revealed by CARMA Dust Continuum Observations [PDF]

, 2014
We present CARMA 2.9 mm dust continuum emission observations of a sample of 14 Herschel-detected Class 0 protostars in the Orion A and B molecular clouds, drawn from the PACS Bright Red Sources (PBRS) sample (Stutz et al.).
Ali, Babar, Calvet, Nuria, Fischer, William J., Hartmann, Lee, Henning, Thomas, Manoj, P., Megeath, S. Thomas, Ragan, Sarah E., Stanke, Thomas, Stutz, Amelia M., Tobin, John J.   +10 more
core   +4 more sources

A Keplerian Circumbinary Disk around the Protobinary System L1551 NE [PDF]

, 2012
We present SubMillimeter-Array observations of a Keplerian disk around the Class I protobinary system L1551 NE in 335 GHz continuum emission and submillimeter line emission in 13CO (J=3-2) and C18O (J=3-2) at a resolution of ~120 x 80 AU.
Andrews, Andrews, Bate, Chen, Crutcher, Delfosse, Duquennoy, Enoch, Enoch, Froebrich, Fuller, Guilloteau, Guilloteau, Harvey, Harvey, Hayashi, Ho, Hogerheijde, Jeremy Lim, Kazuya Saigo, Lim, Loinard, Looney, Looney, Machida, Machida, Machida, Masao Saito, Mathieu, Mellon, Mellon, Momose, Moriarty-Schieven, Moriarty-Schieven, Nimesh A. Patel, Ochi, Ohashi, Ossenkopf, Reipurth, Reipurth, Rodríguez, Sault, Schaefer, Shigehisa Takakuwa, T. K. Sridharan, Takakuwa, Takakuwa, Takakuwa, Vorobyov, Yen, Yen, Yokogawa   +51 more
core   +3 more sources

Searching for Molecular Jets from High-mass Protostars

The Astrophysical Journal Supplement Series, 2023
We report Very Large Array observations in the Q band toward 10 ionized jet candidates to search for SiO emission, a well-known shocked gas tracer. We detected 7 mm continuum counterparts toward 90% of the jet candidates. In most cases, the jet candidate
Tatiana M. Rodríguez, Peter Hofner, Isaac Edelman, Esteban D. Araya, Viviana Rosero   +4 more
doaj   +1 more source

The JCMT Gould Belt Survey: A First Look at the Auriga–California Molecular Cloud with SCUBA-2 [PDF]

, 2018
We present 850 and 450 μm observations of the dense regions within the Auriga–California molecular cloud using SCUBA-2 as part of the JCMT Gould Belt Legacy Survey to identify candidate protostellar objects, measure the masses of their circumstellar ...
A. Chrysostomou, A. Duarte-Cabral, Andrews S. M., Andrews S. M., B. C. Matthews, Berry D. S., Broekhoven-Fiene H., C. D. Wilson, C. J. Davis, C. Mowat, C. Quinn, C. Salji, Chen M. C.-Y., D. Bresnahan, D. Johnstone, D. Nutter, D. Robertson, D. Rumble, D. S. Berry, D. Ward-Thompson, E. Drabek-Maunder, E. Rosolowsky, Evans N. J.II, G. A. Fuller, G. J. White, G. Joncas, G. Moriarty-Schieven, Gutermuth R. A., H. Broekhoven-Fiene, H. Butner, H. Kirk, H. Thomas, Harvey P. M., Harvey P. M., J. Buckle, J. C. Mottram, J. Di Francesco, J. E. Pineda, J. Fiege, J. Greaves, J. Gregson, J. Hatchell, J. Lane, J. M. Kirk, J. Rawlings, J. Richer, J. Wouterloot, J. Yates, K. Marsh, K. Pattle, L. B. G. Knee, Lada C. J., Lane J., M. Chen, M. Fich, M. J. Currie, M. R. Hogerheijde, M. Zhu, Mann R. K., Mann R. K., Mann R. K., Mann R. K., Markwardt C. B. ed Bohlender D. A., Megeath S. T., Mohanty S., N. Tothill, P. Bastien, P. Friberg, P. Harvey, R. Friesen, Robitaille T., S. Coude, S. Graves, S. Mairs, S. Sadavoy, S. Tisi, S. Viti, Sadavoy S. I., Sadavoy S. I., T. Jenness, W. Holland, Ward-Thompson D., Wolk S. J., Young C. H.   +83 more
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