|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'506'133
Articles rated: 2609
27 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Seeds of Life in Space SOLIS. IX. Chemical segregation of $
m SO_2$ and SO toward the low-mass protostellar shocked region of L1157 | | S. Feng
; C. Codella
; C. Ceccarelli
; P. Caselli
; A. Lopez-Sepulcre
; R. Neri
; F. Fontani
; L. Podio
; B. Lefloch
; H. B. Liu
; R. Bachiller
; S. Viti
; | | Date: |
10 May 2020 | | Abstract: | We present observations of SO and $
m SO_2$ lines toward the shocked regions
along the L1157 chemically rich outflow, taken in the context of the Seeds Of
Life In Space IRAM-NOrthern Extended Millimeter Array Large Program, and
supported by data from Submillimeter Array and IRAM-30 m telescope at 1.1--3.6
mm wavelengths. We simultaneously analyze, for the first time, all of the
brightest shocks in the blueshifted lobe, namely, B0, B1, and B2. We found the
following. (1) SO and $
m SO_2$ may trace different gas, given that the
large(-scale) velocity gradient analysis indicates for $
m SO_2$ a volume
density ($
m 10^5 ext{--}10^6,cm^{-3}$) denser than that of the gas emitting
in SO by a factor up to an order of magnitude. (2) Investigating the 0.1 pc
scale field of view, we note a tentative gradient along the path of the
precessing jet. More specifically, $
m chi({SO/SO_2})$ decreases from the
B0-B1 shocks to the older B2. (3) At a linear resolution of 500--1400 au, a
tentative spatial displacement between the two emitting molecules is detected,
with the SO peak closer (with respect to $
m SO_2$) to the position where the
recent jet is impinging on the B1 cavity wall. Our astrochemical modeling shows
that the SO and $
m SO_2$ abundances evolve on timescales less than about 1000
years. Furthermore, the modeling requires high abundances ($2 imes10^{-6}$) of
both $
m H_2S/H$ and S/H injected in the gas phase due to the shock
occurrence, so pre-frozen OCS only is not enough to reproduce our new
observations. | | Source: | arXiv, 2005.4629 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER