Distributed star formation throughout the Galactic Center cloud Sgr B2
A Ginsburg, J Bally, A Barnes, N Bastian… - The Astrophysical …, 2018 - iopscience.iop.org
The Astrophysical Journal, 2018•iopscience.iop.org
We report ALMA observations with resolution≈ 0 farcs 5 at 3 mm of the extended Sgr B2
cloud in the Central Molecular Zone (CMZ). We detect 271 compact sources, most of which
are smaller than 5000 au. By ruling out alternative possibilities, we conclude that these
sources consist of a mix of hypercompact H ii regions and young stellar objects (YSOs). Most
of the newly detected sources are YSOs with gas envelopes that, based on their
luminosities, must contain objects with stellar masses ${M} _ {*}\gtrsim 8\,{M} _ {\odot} $
cloud in the Central Molecular Zone (CMZ). We detect 271 compact sources, most of which
are smaller than 5000 au. By ruling out alternative possibilities, we conclude that these
sources consist of a mix of hypercompact H ii regions and young stellar objects (YSOs). Most
of the newly detected sources are YSOs with gas envelopes that, based on their
luminosities, must contain objects with stellar masses ${M} _ {*}\gtrsim 8\,{M} _ {\odot} $
Abstract
We report ALMA observations with resolution≈ 0 farcs 5 at 3 mm of the extended Sgr B2 cloud in the Central Molecular Zone (CMZ). We detect 271 compact sources, most of which are smaller than 5000 au. By ruling out alternative possibilities, we conclude that these sources consist of a mix of hypercompact H ii regions and young stellar objects (YSOs). Most of the newly detected sources are YSOs with gas envelopes that, based on their luminosities, must contain objects with stellar masses
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