In:
The Astrophysical Journal, American Astronomical Society, Vol. 910, No. 1 ( 2021-03-01), p. 61-
Abstract:
The l = +13 region in the Galactic center is characterized by multiple shell-like structures and their extremely broad velocity widths. We revisit the molecular superbubble hypothesis for this region, based on high-resolution maps of CO J = 1–0, 13 CO J = 1−0, H 13 CN J = 1−0, H 13 CO + J = 1−0, SiO J = 2−1, and CS J = 2−1 lines obtained from the Nobeyama Radio Observatory 45 m telescope, as well as CO J = 3−2 maps obtained from the James Clerk Maxwell telescope. We identified 11 expanding shells with total kinetic energy and typical expansion time E kin ∼ 10 51.9 erg and t exp ∼ 10 4.9 yr, respectively. In addition, the l = +13 region exhibited high SiO J = 2−1/H 13 CN J = 1−0 and SiO J = 2−1/H 13 CO + J = 1−0 intensity ratios, indicating that the region has experienced dissociative shocks in the past. These new findings confirm the molecular superbubble hypothesis for the l = +13 region. The nature of the embedded star cluster, which may have supplied 20–70 supernova explosions within 10 5 yr, is discussed. This work also shows the importance of compact broad-velocity-width features in searching for localized energy sources hidden behind severe interstellar extinction and stellar contamination.
Type of Medium:
Online Resource
ISSN:
0004-637X
,
1538-4357
DOI:
10.3847/1538-4357/abe61e
Language:
Unknown
Publisher:
American Astronomical Society
Publication Date:
2021
detail.hit.zdb_id:
2207648-7
detail.hit.zdb_id:
1473835-1
SSG:
16,12
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