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27 April 2024 |
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Article overview
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Multi-wavelength study of the star-formation in the S237 H II region | | L. K. Dewangan
; D. K. Ojha
; I. Zinchenko
; P. Janardhan
; A. Luna
; | | Date: |
26 Oct 2016 | | Abstract: | We present a detailed multi-wavelength study of observations from X-ray,
near-infrared to centimeter wavelengths to probe the star formation processes
in the S237 region. Multi-wavelength images trace an almost sphere-like shell
morphology of the region, which is filled with the 0.5--2 keV X-ray emission.
The region contains two distinct environments - a bell-shaped cavity-like
structure containing the peak of 1.4 GHz emission at center, and elongated
filamentary features without any radio detection at edges of the sphere-like
shell - where {it Herschel} clumps are detected. Using the 1.4 GHz continuum
and $^{12}$CO line data, the S237 region is found to be excited by a radio
spectral type of B0.5V star and is associated with an expanding H{sc ii}
region. The photoionized gas appears to be responsible for the origin of the
bell-shaped structure. The majority of molecular gas is distributed toward a
massive {it Herschel} clump (M$_{clump}$ $sim$260 M$_{odot}$), which
contains the filamentary features and has a noticeable velocity gradient. The
photometric analysis traces the clusters of young stellar objects (YSOs) mainly
toward the bell-shaped structure and the filamentary features. Considering the
lower dynamical age of the H,{sc ii} region (i.e. 0.2-0.8 Myr), these
clusters are unlikely to be formed by the expansion of the H,{sc ii} region.
Our results also show the existence of a cluster of YSOs and a massive clump at
the intersection of filamentary features, indicating that the collisions of
these features may have triggered cluster formation, similar to those found in
Serpens South region. | | Source: | arXiv, 1610.8428 | | Services: | Forum | Review | PDF | Favorites | |
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