Results 21 to 30 of about 1,290 (180)

Star Formation: Chemistry as a Probe of Embedded Protostars [PDF]

Proceedings of Frank N. Bash Symposium 2013: New Horizons in Astronomy — PoS(BASH 2013), 2014
The embedded phase of star formation is the crucial phase where most of the stellar mass is assembled. Velocity-resolved spectra reveal an infalling envelope, bipolar outflows, and perhaps an infant circumstellar disk -- all locked together in a cosmic dance of gravitational collapse and magnetic winds.
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UKIRT Widefield Infrared Survey for Fe+ [PDF]

, 2014
The United Kingdom Infrared Telescope (UKIRT)Widefield Infrared Survey for Fe+ (UWIFE) is a 180 deg2 imaging survey of the first Galactic quadrant (7° < l < 62° |b| <1°.5) that uses a narrow-band filter centred on the [Fe II] 1.644-μm ...
Kim, Hyun-Jeong, Lee, Myung Gyoon, Hwang, Narae, Varricatt, Watson P., Chun, Moo-Young, Lee, Jae-Joon, Lee, Ho-Gyu, Lee, Hyung Mok, Koo, Bon-Chul, Pyo, Tae-Soo, Park, Byeong-Gon, Moon, Dae-Sik, Kim, Yesol, Kyeong, Jaemann, Ishiguro, Masateru, Davis, Chris J., Yoon, Sung-Chul, Lee, Yong-Hyun, Shinn, Jong-Ho, Froebrich, Dirk   +19 more
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Star Formation: From OB Associations to Protostars [PDF]

Symposium - International Astronomical Union, 1987
The study of star formation is a relatively young discipline of the field of astronomy. Up until the mid point of the twentieth century only a most rudimentary understanding of the subject was possible. This is because prior to that time there did not exist any substantive body of empirical data which could be used to critically test even the most ...
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The HH 24 Complex: Jets, Multiple Star Formation, and Orphaned Protostars

The Astronomical Journal, 2023
Abstract The HH 24 complex harbors five collimated jets emanating from a small protostellar multiple system. We have carried out a multiwavelength study of the jets, their driving sources, and the cloud core hosting the embedded stellar system, based on data from the Hubble Space Telescope, Gemini, Subaru, Apache Point Observatory 3.5 m,
Bo Reipurth, J. Bally, Hsi-Wei Yen, H. G. Arce, L.-F. Rodríguez, A. C. Raga, T. R. Geballe, R. Rao, F. Comerón, S. Mikkola, C. A. Aspin, J. Walawender   +11 more
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EFFECTS OF TURBULENCE ON COSMIC RAY PROPAGATION IN PROTOSTARS AND YOUNG STAR/DISK SYSTEMS [PDF]

The Astrophysical Journal, 2014
The magnetic fields associated with young stellar objects are expected to have an hour-glass geometry, i.e., the magnetic field lines are pinched as they thread the equatorial plane surrounding the forming star but merge smoothly onto a background field at large distances.
Marco Fatuzzo, Fred C. Adams
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The Mass Accretion Rate and Stellar Properties in Class I Protostars [PDF]

, 2023
Stars collect most of their mass during the protostellar stage, yet the accretion luminosity and stellar parameters, which are needed to compute the mass accretion rate, are poorly constrained for the youngest sources.
Rosotti, Giovanni, Cruz-Sáenz de Miera, F., Kóspál, Á., Cruz-Sáenz de Miera, Fernando, Tychoniec, Łukasz, Fiorellino, E., Antoniucci, Simone, Manara, Carlo F., Antoniucci, S., Tychoniec, Ł., Kóspál, Ágnes, Rosotti, G.P., Giovanni Rosotti, Manara, C.F., Nisini, Brunella, Eleonora Fiorellino, Fernando Cruz-Sáenz de Miera, Nisini, B., Brunella Nisini, Ágnes Kóspál, Simone Antoniucci, Łukasz Tychoniec, Fiorellino, Eleonora, Carlo F. Manara   +23 more
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Optimizing End-to-End System Performance for Millimeter and Submillimeter Spectroscopy of Protostars: Wideband Heterodyne Receivers and Sideband-Deconvolution Techniques for Rapid Molecular-Line Surveys [PDF]

, 2011
This thesis describes the construction, integration, and use of a new 230-GHz ultra-wideband heterodyne receiver, as well as the development and testing of a new sideband-deconvolution algorithm, both designed to enable rapid, sensitive molecular-line ...
Sumner, Matthew Casey
core   +1 more source

The SOFIA Massive (SOMA) Star Formation Survey. IV. Isolated Protostars

The Astrophysical Journal, 2022
Abstract We present ∼10–40 μm SOFIA-FORCAST images of 11 isolated protostars as part of the SOFIA Massive (SOMA) Star Formation Survey, with this morphological classification based on 37 μm imaging. We develop an automated method to define source aperture size using the gradient of its background-subtracted enclosed flux and apply this ...
Rubén Fedriani, Jonathan C. Tan, Zoie Telkamp, Yichen Zhang, Yao-Lun Yang, Mengyao Liu, James M. De Buizer, Chi-Yan Law, Maria T. Beltran, Viviana Rosero, Kei E. I. Tanaka, Giuliana Cosentino, Prasanta Gorai, Juan Farias, Jan E. Staff, Barbara Whitney   +15 more
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Evolution of massive protostars: the IRAS 18151-1208 region [PDF]

, 2008
The study of physical and chemical properties of massive protostars is critical to better understand the evolutionary sequence which leads to the formation of high-mass stars.
Bontemps, S., Bontemps, Sylvain, Purcell, C. R., Herpin, F., Herpin, Fabrice, van Der Tak, F. F. S., M. Marseille, S. Bontemps, F. Herpin, F. F. S. van der Tak, C. R. Purcell, Marseille, M.,, Marseille, M.   +12 more
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Magnetospheric accretion on the fully-convective classical T Tauri star DN Tau

, 2013
The MaPP project is supported by the funding agencies of CFHT and TBL (through the allocation of telescope time) and by INSU/CNRS in particular, as well as by the French ‘Agence Nationale pour la Recherche’ (ANR).
Menard, F, G. Hussain, M. M. Romanova, Gregory, S. G.; id_orcid, Dougados, C., S. H. P. Alencar, Ménard, F., Gregory, S. G., Hussain, G., C. Dougados, The Mapp, Donati, J. -F., Alencar, S. H. P., Romanova, M. M., Alencar, SHP, J. Bouvier, Bouvier, J, Gregory, Scott, Dougados, C, Bouvier, J., Jardine, Moira Mary, Hussain, G. A. J., Jardine, M. M., M. M. Jardine, Romanova, MM, Donati, JF, S. G. Gregory, J. -f. Donati   +27 more
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