Herschel/PACS Imaging of Protostars in the HH 1-2 Outflow Complex

Abstract

We present 70 and 160 micron 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 3.6-40 micron imaging and spectroscopy are detected in the 70 micron band, and three are clearly detected at 160 microns. We measure photometry of the protostars in the PACS bands and assemble their spectral energy distributions (SEDs) from 1 to 870 microns 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 12-84 L_sun 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 160 microns.

6 pages, 4 figures, accepted for publication in the A&A Herschel special issue

References in corpus (5)

• Herschel Space Observatory - An ESA facility for far-infrared and submillimetre astronomy
• The Photodetector Array Camera and Spectrometer (PACS) on the Herschel Space Observatory
• The distance to the Orion Nebula
• Constraining the Envelope Structure of L1527 IRS: Infrared Scattered Light Modeling
• Hier ist wahrhaftig ein Loch im Himmel - The NGC 1999 dark globule is not a globule

Cited by in corpus (36)

• The Spitzer Space Telescope Survey of the Orion A & B Molecular Clouds - Part I: A Census of Dusty Young Stellar Objects and a Study of their Mid-IR Variability
• The VLA/ALMA Nascent Disk and Multiplicity (VANDAM) Survey of Orion Protostars. A Statistical Characterization of Class 0 and I Protostellar Disks
• The Herschel Orion Protostar Survey: Spectral Energy Distributions and Fits Using a Grid of Protostellar Models
• A Herschel and APEX Census of the Reddest Sources in Orion: Searching for the Youngest Protostars
• Radio Jets from Young Stellar Objects
• Luminosity Functions of Spitzer Identified Protostars in Nine Nearby Molecular Clouds
• The Herschel Orion Protostar Survey: Luminosity and Envelope Evolution
• Herschel/PACS Spectroscopic Survey of Protostars in Orion: The Origin of Far-Infrared CO Emission
• VISION - Vienna survey in Orion I. VISTA Orion A Survey
• POISSON project - II - A multi-wavelength spectroscopic and photometric survey of young protostars in L 1641
• HiRes Deconvolved Spitzer Images of 89 Protostellar Jets and Outflows: New Data on Evolution of Outflow Morphology
• VISION - Vienna survey in Orion. III. Young stellar objects in Orion A
• Multiwavelength Observations of V2775 Ori, an Outbursting Protostar in L 1641: Exploring the Edge of the FU Orionis Regime
• The VLA/ALMA Nascent Disk and Multiplicity (VANDAM) Survey of Orion Protostars V. A Characterization of Protostellar Multiplicity
• The Dependence of Protostellar Luminosity on Environment in the Cygnus-X Star-Forming Complex
• A Spitzer-IRS Detection of Crystalline Silicates in a Protostellar Envelope
• ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): A Hot Corino Survey toward Protostellar Cores in the Orion Cloud
• An ALMA Survey of Protoplanetary Disks in Lynds 1641
• Characterizing the Youngest Herschel-detected Protostars I. Envelope Structure Revealed by CARMA Dust Continuum Observations
• Massive compact disks around FU Orionis-type young eruptive stars revealed by ALMA
• Hier ist wahrhaftig ein Loch im Himmel - The NGC 1999 dark globule is not a globule
• On the nature of the deeply embedded protostar OMC-2 FIR 4
• ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): I. Detection of New Hot Corinos with ACA
• First Science Observations with SOFIA/FORCAST: Properties of Intermediate-Luminosity Protostars and Circumstellar Disks in OMC-2
• Characterizing the Youngest Herschel-detected Protostars II. Molecular Outflows from the Millimeter and the Far-infrared
• AMI radio continuum observations of young stellar objects with known outflows
• Predicted Colors and Flux Densities of Protostars in the Herschel PACS and SPIRE Filters
• Planck Cold Clumps in the lambda Orionis Complex. III. A chemical probe of stellar feedback on cores in the lambda Orionis cloud
• Water and Methanol Maser Survey of Protostars in the Orion Molecular Cloud Complex
• The Herschel Orion Protostar Survey: Far-Infrared Photometry and Colors of Protostars and Their Variations across Orion A and B
• HOPS 136: An Edge-On Orion Protostar Near the End of Envelope Infall
• Evolution of the atomic component in protostellar outflows
• An ALMA search for substructure and fragmentation in starless cores in Orion B North
• Mid-$J$ CO Line Observations of Protostellar Outflows in the Orion Molecular Clouds
• Wide-binary eccentricity distribution in young star clusters: dependence on the binary separation and mass
• The Radio Jet Associated with the Multiple V380 Ori System