HH 114 MMS: a new chemically active outflow

Autor(en)

M. Tafalla, Alvaro Hacar Gonzalez

Abstrakt

Context. A small group of bipolar protostellar outflows display strong

emission from shock-tracer molecules such as SiO and CH3OH,

and are generally referred to as "chemically active". The best-studied

outflow from this group is the one in L 1157. Aims: We study the

molecular emission from the bipolar outflow powered by the very young

stellar object HH 114 MMS and compare its chemical composition with that

of the L 1157 outflow. Methods: We have used the IRAM 30 m radio

telescope to observe a number of transitions from CO, SiO,

CH3OH, SO, CS, HCN, and HCO+ toward the HH 114 MMS

outflow. The observations consist of maps and a two-position molecular

survey. Results: The HH 114 MMS outflow presents strong emission

from a number of shock-tracer molecules that dominate the appearance of

the maps around the central source. The abundance of these molecules is

comparable to the abundance in L 1157. Conclusions: The outflow

from HH 114 MMS is a spectacular new case of a chemically active

outflow.

Based on observations carried out with the IRAM 30 m Telescope. IRAM is

supported by INSU/CNRS (France), MPG (Germany) and IGN (Spain).

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

Observatorio Astronómico Nacional (OAN-IGN)

Journal

Astronomy & Astrophysics

Band

552

Anzahl der Seiten

4

ISSN

0004-6361

DOI

https://doi.org/10.1051/0004-6361/201321303

Publikationsdatum

04-2013

Peer-reviewed

Ja

ÖFOS 2012

103004 Astrophysik, 103003 Astronomie

Schlagwörter

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