Age spreads in star forming regions? [PDF]
, 2008 Rotation periods and projected equatorial velocities of pre-main-sequence (PMS) stars in star forming regions can be combined to give projected stellar radii. Assuming random axial orientation, a Monte-Carlo model is used to illustrate that distributions
D'Antona +5 more
core +1 more source
Trigonometric Parallaxes of Star-forming Regions beyond the Tangent Point of the Sagittarius Spiral Arm [PDF]
Astrophysical Journal, 2019 As part of the BeSSeL Survey, we report trigonometric parallaxes and proper motions of molecular maser sources associated with 13 distant high-mass star-forming regions in the Sagittarius spiral arm of the Milky Way.
Y. Wu 吴 +11 more
semanticscholar +1 more source
EVN observations of 6.7 GHz methanol maser polarization in massive star-forming regions [PDF]
Astronomy & Astrophysics, 2019 Context. Magnetohydrodynamical simulations show that the magnetic field can drive molecular outflows during the formation of massive protostars. The best probe to observationally measure both the morphology and the strength of this magnetic field at ...
G. Surcis +4 more
semanticscholar +1 more source
Star Formation in Collision Debris: Insights from the modeling of their Spectral Energy Distribution [PDF]
, 2010 During galaxy-galaxy interactions, massive gas clouds can be injected into the intergalactic medium which in turn become gravitationally bound, collapse and form stars, star clusters or even dwarf galaxies.
Appleton, P. N. +6 more
core +5 more sources
A Multiwavelength Look at Galactic Massive Star-forming Regions [PDF]
Astrophysical Journal, 2018 We present a multiwavelength study of 28 Galactic massive star-forming H ii regions. For 17 of these regions, we present new distance measurements based on Gaia DR2 parallaxes. By fitting a multicomponent dust, blackbody, and power-law continuum model to
B. Binder, M. Povich
semanticscholar +1 more source
Rapid destruction of protoplanetary discs due to external photoevaporation in star-forming regions [PDF]
Monthly notices of the Royal Astronomical Society, 2019 We analyse N-body simulations of star-forming regions to investigate the effects of externalfar- and extreme-ultraviolet photoevaporation from massive stars on protoplanetary discs. Byvarying the initial conditions of simulated star-forming regions, such
R. Nicholson +5 more
semanticscholar +1 more source
Interstellar Glycolaldehyde, Methyl Formate, and Acetic Acid. I. A Bimodal Abundance Pattern in Star-forming Regions [PDF]
Astrophysical Journal, 2019 The relative column densities of the structural isomers methyl formate, glycolaldehyde, and acetic acid are derived for a dozen positions toward the massive star-forming regions MM1 and MM2 in the NGC 6334I complex, which are separated by ∼4000 au ...
S. El-Abd +5 more
semanticscholar +1 more source
Super Star Clusters in SBS0335-052E [PDF]
, 2008 As one of the lowest metallicity star forming galaxies, with a nucleus of several super star clusters, SBS0335-052E is the subject of substantial current study.
Bekki +31 more
core +1 more source
Origin of the PN molecule in star-forming regions: the enlarged sample [PDF]
Monthly notices of the Royal Astronomical Society, 2019 Phosphorus nitride (PN) is the P-bearing species with the highest number of detections in star-forming regions. Multiline studies of the molecule have shown that the excitation temperature of PN is usually lower than the gas kinetic temperature ...
F. Fontani +6 more
semanticscholar +1 more source
Parallaxes for Star-forming Regions in the Inner Perseus Spiral Arm [PDF]
Astronomical Journal, 2019 We report trigonometric parallax and proper motion measurements of 6.7 GHz CH3OH and 22 GHz H2O masers in eight high-mass star-forming regions (HMSFRs) based on Very Long Baseline Array (VLBA) observations as part of the Bar and Spiral Structure Legacy ...
Bo Zhang +10 more
semanticscholar +1 more source