SIMBAD references

2010A&A...518L.122F - Astronomy and Astrophysics, volume 518, L122-122 (2010/7-2)

Herschel-PACS imaging of protostars in the HH 1-2 outflow complex.

FISCHER W.J., MEGEATH S.T., ALI B., TOBIN J.J., OSORIO M., ALLEN L.E., KRYUKOVA E., STANKE T., STUTZ A.M., BERGIN E., CALVET N., DI FRANCESCO J., FURLAN E., HARTMANN L., HENNING T., KRAUSE O., MANOJ P., MARET S., MUZEROLLE J., MYERS P., NEUFELD D., PONTOPPIDAN K., POTEET C.A., WATSON D.M. and WILSON T.

Abstract (from CDS):

We present 70 and 160 µm Herschel science demonstration images of a field in the Orion A molecular cloud that contains the prototypical Herbig-Haro objects HH 1 and 2, obtained with the Photodetector Array Camera and Spectrometer (PACS). These observations demonstrate Herschel's unprecedented ability to study the rich population of protostars in the Orion molecular clouds at the wavelengths where they emit most of their luminosity. The four protostars previously identified by Spitzer 3.6-40µm imaging and spectroscopy are detected in the 70µm band, and three are clearly detected at 160µm. We measure photometry of the protostars in the PACS bands and assemble their spectral energy distributions (SEDs) from 1 to 870µm with these data, Spitzer spectra and photometry, 2MASS data, and APEX sub-mm data. The SEDs are fit to models generated with radiative transfer codes. From these fits we can constrain the fundamental properties of the protostars. We find luminosities in the range 12-84L and envelope densities spanning over two orders of magnitude. This implies that the four protostars have a wide range of envelope infall rates and evolutionary states: two have dense, infalling envelopes, while the other two have only residual envelopes. We also show the highly irregular and filamentary structure of the cold dust and gas surrounding the protostars as traced at 160µm.

Abstract Copyright:

Journal keyword(s): stars: formation - stars: protostars - circumstellar matter - infrared: ISM - infrared: stars

Nomenclature: Table 1: HOPS NNN (No. 165) added.

Simbad objects: 16

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2021.06.20-16:07:17

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