L1448-MM Observations by the Herschel Key Program, "Dust, Ice, and Gas In Time" (DIGIT)

Author(s)

, Jinhee Lee, Jeong-Eun Lee, Seokho Lee, Joel. D. Green, Neal J., II Evans, Minho Choi, Lars Kristensen, Odyssefs Dionatos, Jes K. Jørgensen

Abstract

We present Herschel/Photodetector Array Camera and Spectrometer (PACS)

observations of L1448-MM, a Class 0 protostar with a prominent outflow.

Numerous emission lines are detected at 55 1000 K) environment, indicative of a

shock origin. For OH, IR-pumping processes play an important role in the

level population. The molecular emission in L1448-MM is better explained

with a C-shock model, but the atomic emission of PACS [O I] and

Spitzer/Infrared Spectrograph [Si II] emission is not consistent with

C-shocks, suggesting multiple shocks in this region. Water is the major

line coolant of L1448-MM in the PACS wavelength range, and the best-fit

LVG models predict that H2O and CO emit (50%-80%) of their

line luminosity in the PACS wavelength range.

Organisation(s)

Department of Astrophysics

External organisation(s)

Natural History Museum of Denmark, University of Texas, Austin, Kyung Hee University, Seoul National University (SNU), Korea Astronomy and Space Science Institute, Harvard-Smithsonian Center for Astrophysics

Journal

The Astrophysical Journal Supplement Series

Volume

209

No. of pages

21

ISSN

0067-0049

DOI

https://doi.org/10.1088/0067-0049/209/1/4

Publication date

11-2013

Peer reviewed

Yes

Austrian Fields of Science 2012

103004 Astrophysics, 103003 Astronomy

Keywords

Portal url

https://ucrisportal.univie.ac.at/en/publications/a7d6649f-c766-40b0-a71f-35e282c46b34