ALMA Observations of Fragmentation, Substructure, and Protostars in High-mass Starless Clump Candidates [PDF]
Astrophysical Journal, 2019 The initial physical conditions of high-mass stars and protoclusters remain poorly characterized. To this end, we present the first targeted ALMA Band 6 1.3 mm continuum and spectral line survey toward high-mass starless clump candidates, selecting a ...
B. Svoboda +9 more
semanticscholar +1 more source
EVOLUTION OF MASS OUTFLOW IN PROTOSTARS [PDF]
The Astrophysical Journal, 2016 ABSTRACT We have surveyed 84 Class 0, Class I, and flat-spectrum protostars in mid-infrared [Si ii], [Fe ii], and [S i] line emission, and 11 of these in far-infrared [O i] emission. We use the results to derive their mass outflow rates, .
Dan M. Watson +11 more
openaire +2 more sources
Low dust emissivities and radial variations in the envelopes of Class 0 protostars: possible signature of early grain growth [PDF]
Astronomy & Astrophysics, 2019 Context. Analyzing the properties of dust and its evolution in the early phases of star formation is crucial to put constraints on the collapse and accretion processes as well as on the pristine properties of planet-forming seeds. Aims. In this paper, we
M. Galametz +5 more
semanticscholar +1 more source
Interferometric studies of low-mass protostars
, 2011 With the advances in high angular resolution (sub)millimeter observations of lowmass protostars, windows of opportunities are opening up for very detailed studies of the molecular structure of star forming regions on wide range of spatial scales.
Jørgensen, Jes K.
core +1 more source
The ALMA-PILS survey: the sulphur connection between protostars and comets: IRAS 16293-2422 B and 67P/Churyumov-Gerasimenko [PDF]
, 2018 The evolutionary past of our Solar system can be pieced together by comparing analogous lowmass protostars with remnants of our Protosolar Nebula - comets.
M. Drozdovskaya +11 more
semanticscholar +1 more source
ALMA observations of water deuteration: a physical diagnostic of the formation of protostars [PDF]
Astronomy & Astrophysics, 2019 Context. How water is delivered to planetary systems is a central question in astrochemistry. The deuterium fractionation of water can serve as a tracer for the chemical and physical evolution of water during star formation and can constrain the origin ...
S. Jensen +7 more
semanticscholar +1 more source
Accretion onto a primordial protostar [PDF]
New Astronomy, 2004 New Astronomy, in press, June 2004, vol.9, pp.353 ...
Bromm, Volker, Loeb, Abraham
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Giant Protostellar Flares: Accretion-driven Accumulation and Reconnection-driven Ejection of Magnetic Flux in Protostars [PDF]
Astrophysical Journal, 2019 Protostellar flares are rapid magnetic energy release events associated with the formation of hot plasma in protostars. In the previous models of protostellar flares, the interaction between a protostellar magnetosphere with the surrounding disk plays ...
S. Takasao +3 more
semanticscholar +1 more source
Journal of Gastroenterology and Hepatology, Volume 41, Issue 7, Page 2006-2029, July 2026.ABSTRACT Ulcerative colitis (UC) and Crohn's disease (CD) are increasingly prevalent in the Asia Pacific region, necessitating updated, region‐specific guidance on advanced therapies. Targeted small molecule agents, such as filgotinib, tofacitinib, upadacitinib, etrasimod, and ozanimod; and the IL‐23 p19 inhibitors (guselkumab, mirikizumab ...
Choon Jin Ooi +34 more
wiley +1 more source
PROTOSTARS AT LOW EXTINCTION IN ORION A [PDF]
The Astrophysical Journal, 2016 ABSTRACT In the list of young stellar objects (YSOs) compiled by Megeath et al. for the Orion A molecular cloud, only 44 out of 1208 sources found projected onto low extinction ( mag) gas are identified as protostars.
John Arban Lewis, Charles J. Lada
openaire +2 more sources