Results 41 to 50 of about 563,924 (339)
Anomalous Microwave Emission from Star Forming Regions
Advances in Astronomy, 2013 The evidence for microwave emission from spinning dust grains has been strengthened considerably by its detection in a number of discrete astrophysical objects associated with star formation.
Anna M. M. Scaife
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The Detection of Higher-order Millimeter Hydrogen Recombination Lines in the Large Magellanic Cloud
The Astrophysical Journal, 2023 We report the first extragalactic detection of the higher-order millimeter hydrogen recombination lines (Δ n > 2). The γ -, ϵ -, and η -transitions have been detected toward the millimeter continuum source N 105–1 A in the star-forming region N 105 in ...
Marta Sewiło +12 more
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Origin of optically passive spiral galaxies with dusty star-forming regions: Outside-in truncation of star formation? [PDF]
, 2010 Recent observations have revealed that red, optically--passive spiral galaxies with little or no optical emission lines, harbour significant amounts of dust-obscured star formation. We propose that these observational results can be explained if the spatial distributions of the cold gas and star-forming regions in these spiral galaxies are ...
arxiv +1 more source
Understanding the secular evolution of NGC 628 using UVIT [PDF]
, 2022 Secular and environmental effects play a significant role in regulating the star formation rate and hence the evolution of the galaxies. Since UV flux is a direct tracer of the star formation in galaxies, the UltraViolet Imaging Telescope (UVIT) onboard ASTROSAT enables us to characterize the star forming regions in a galaxy with its remarkable spatial
arxiv +1 more source
Ices in star forming regions [PDF]
Symposium - International Astronomical Union, 1997 IR spectra of sources associated with molecular cloud material show a variety of absorption features attributed to simple molecules, such as H2O, CO, CH3OH, CO2, CH4, and OCS in icy grain mantles. These identifications are reviewed. These molecules are formed through accretion and reaction of gas phase species on grain surfaces.
Alexander G. G. M. Tielens +1 more
openaire +2 more sources
The birth environment of planetary systems [PDF]
Royal Society Open Science, 2020 Star and planet formation are inextricably linked. In the earliest phases of the collapse of a protostar, a disc forms around the young star and such discs are observed for the first several million years of a star’s life.
Richard J. Parker
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On the distance to the Ophiuchus star‐forming region [PDF]
Astronomische Nachrichten, 2008 AbstractThe Ophiuchus molecular cloud complex has produced in Lynds 1688 the richest known embedded cluster within ∼300 pc of the Sun. Unfortunately, distance estimates to the Oph complex vary by nearly ∼40% (∼120–165 pc). Here I calculate a new independent distance estimate of 135±8 pc to this benchmark star‐forming region based on Hipparcos ...
openaire +3 more sources
Seeing Star Formation Regions with Gravitational Microlensing [PDF]
Astrophys.J. 643 (2006) 260-265, 2006 We qualitatively study the effects of gravitational microlensing on our view of unresolved extragalactic star formation regions. Using a general gravitational microlensing configuration, we perform a number of simulations that reveal that specific imprints of the star forming region are imprinted, both photometrically and spectroscopically, upon ...
arxiv +1 more source
Dense Outflowing Molecular Gas in Massive Star-forming Regions
The Astronomical JournalDense outflowing gas, traced by transitions of molecules with large dipole moment, is important for understanding mass loss and feedback of massive star formation.
Yani Xu +8 more
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A 3D View of Orion. I. Barnard's Loop
The Astrophysical Journal, 2023 Barnard’s Loop is a famous arc of H α emission located in the Orion star-forming region. Here, we provide evidence of a possible formation mechanism for Barnard’s Loop and compare our results with recent work suggesting a major feedback event occurred in
Michael M. Foley +13 more
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