PROPERTIES OF THE COMPACT H II REGION COMPLEX G-0.02-0.07

E Mills; M. R Morris; C. C Lang; H Dong; Q. D Wang; A Cotera; S. R Stolovy

doi:10.1088/0004-637X/735/2/84

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PROPERTIES OF THE COMPACT H II REGION COMPLEX G-0.02-0.07

Journal article

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PROPERTIES OF THE COMPACT H II REGION COMPLEX G-0.02-0.07

E Mills, M. R Morris, C. C Lang, H Dong, Q. D Wang, A Cotera and S. R Stolovy

The Astrophysical journal, Vol.735(2), 84

2011

DOI: 10.1088/0004-637X/735/2/84

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https://arxiv.org/pdf/1102.2533View

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Abstract

We present new extinction maps and high-resolution Paschen-alpha images of G-0.02-0.07, a complex of compact H ii regions located adjacent to the M-0.02-0.07 giant molecular cloud, 6 pc in projection from the center of the Galaxy. These H ii regions, which lie in projection just outside the boundary of the Sgr A East supernova remnant, represent one of the most recent episodes of star formation in the central parsecs of the Galaxy. The 1.87 μm extinctions of regions A, B, and C are almost identical, approximately 3.7 mag. Region D, in contrast, has a peak extinction of A1.87 = 5.9 mag. Adopting an extinction law specific to the Galactic center, we find that these extinctions correspond to visual extinctions of AV = 45 and AV = 71. The similar and uniform extinctions of regions A, B, and C are consistent with that expected for foreground extinction in the direction of the Galactic center, suggesting that they lie at the front side of the M-0.02-0.07 molecular cloud. Region D is more compact, has a higher extinction, and is thus suspected to be younger and embedded in a dense core in a compressed ridge on the western edge of this cloud.

Astronomy

Earth, ocean, space

Exact sciences and technology

Details

Title: Subtitle: PROPERTIES OF THE COMPACT H II REGION COMPLEX G-0.02-0.07
Creators: E Mills - University of California, Los Angeles
M. R Morris - University of California, Los Angeles
C. C Lang - University of Iowa
H Dong - University of Massachusetts Amherst
Q. D Wang - University of Massachusetts Amherst
A Cotera - Search for Extraterrestrial Intelligence
S. R Stolovy - Spitzer Science Center, MS 220-6, Pasadena, CA 91125, USA
Resource Type: Journal article
Publication Details: The Astrophysical journal, Vol.735(2), 84
DOI: 10.1088/0004-637X/735/2/84
ISSN: 0004-637X
eISSN: 1538-4357
Publisher: Institute of Physics (IOP)
Language: English
Date published: 2011
Academic Unit: Liberal Arts and Science Admin; Physics and Astronomy
Record Identifier: 9984199928202771

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