Herschel FIR Spectroscopic Observations of L1448-MM

Details Herschel FIR Spectroscopic Observations of L1448-MM Herschel FIR Spectroscopic Observations of L1448-MM

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21944403l&link_type=abstract

American Astronomical Society, AAS Meeting #219, #444.03

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the FIR (continuum and line) maps and spectra of L1448-MM at 55 to 210 micron observed with the range scan mode of PACS on the Herschel Space Observatory, as part of the DIGIT key program. L1448-MM was previously known as an embedded Class 0 and prominent outflow source, and a secondary YSO was claimed by the Spitzer images and confirmed by submm interferometric observations. The PACS detected various CO, OH, H2O, and OI lines. The PACS line and continuum maps show that the emission at shorter wavelengths peaks at the central spatial pixel (the primary YSO position) although the line emission of low energy levels distributes along the outflow direction. According to our excitation analysis, the CO gas has two temperature components (warm and hot) that are tentatively attributed to PDR and shock, respectively. However, the H2O gas with the rotational temperature of 200 K seems to trace the shock. Interestingly, the relative strength of OH transitions suggests the IR pumping process dominates in L1448-MM. The gas along the outflow cavities in L1448-MM seems to be heated mainly by shock and UV photons, and relative line luminosities indicate that H2O and CO are the main coolants of this gas, although cooling by OI and OH cannot be ignored.

Affiliated with

Also associated with

No associations

Rating

Herschel FIR Spectroscopic Observations of L1448-MM does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Herschel FIR Spectroscopic Observations of L1448-MM, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Herschel FIR Spectroscopic Observations of L1448-MM will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-747932