HOPS

Herschel Orion Protostar Survey (HOPS) Overview

HOPS Overview

HOPS Primary Data Access

HOPS SEDs

IRSA Catalog Search Tool: HOPS

Overview

The Herschel Orion Protostar Survey (HOPS, KPOT_tmegeath_2) is a sample of 410 young stellar objects (YSOs) in the Orion molecular clouds, selected from Spitzer data. Most objects have near-infrared photometry from 2MASS, mid- and far-infrared data from Spitzer and Herschel, and submillimeter photometry from APEX; thus, the SEDs cover 1.2 - 870 microns and are used to classify the sample into protostellar classes. Of the 410 YSOs, 330 have Spitzer and Herschel data and are mostly protostars; the remaining objects include likely extragalactic contaminants and faint YSOs. Using mid-IR spectral indices and bolometric temperatures, the sample of 330 YSOs is classified into 92 Class 0 protostars, 125 Class I protostars, 102 flat-spectrum sources, and 11 Class II pre-main-sequence stars. HOPS also implements a simple protostellar model (including a disk in an infalling envelope with outflow cavities) to generate a grid of 30,400 model SEDs and uses it to determine the best-fit model parameters for each protostar. If you use HOPS data, please cite both the journal article Furlan et al. (2016) and the dataset Digital Object Identifier (DOI): 10.26131/IRSA87. Jump to documentation.

The Herschel Orion Protostar Survey (HOPS, KPOT_tmegeath_2) is a sample of 410 young stellar objects (YSOs) in the Orion molecular clouds, selected from Spitzer data. Most objects have near-infrared photometry from 2MASS, mid- and far-infrared data from Spitzer and Herschel, and submillimeter photometry from APEX; thus, the SEDs cover 1.2 - 870 microns and are used to classify the sample into protostellar classes. Of the 410 YSOs, 330 have Spitzer and Herschel data and are mostly protostars; the remaining objects include likely extragalactic contaminants and faint YSOs. Using mid-IR spectral indices and bolometric temperatures, the sample of 330 YSOs is classified into 92 Class 0 protostars, 125 Class I protostars, 102 flat-spectrum sources, and 11 Class II pre-main-sequence stars. HOPS also implements a simple protostellar model (including a disk in an infalling envelope with outflow cavities) to generate a grid of 30,400 model SEDs and uses it to determine the best-fit model parameters for each protostar.

If you use HOPS data, please cite both the journal article Furlan et al. (2016) and the dataset Digital Object Identifier (DOI): 10.26131/IRSA87.

Jump to documentation.

Data Set Characteristics

Data Product	Description	Data Access
Images	Spitzer/IRAC 3.6, 4.5, 5.8, 8 micron Spitzer/MIPS 24 micron Herschel/PACS 70, 160 micron	Image and Spectrum Server (Atlas) SEDs Quick Look Browseable Directories Program Interface
Spectra	Spitzer/IRS 5-38 micron	Image and Spectrum Server (Atlas) SEDs Quick Look Browseable Directory Program Interface
SED Data Catalog	2MASS JHK_s Spitzer/IRAC 3.6, 4.5, 5.8, 8 micron Spitzer/MIPS 24 micron Herschel/PACS 70, 100, 160 micron APEX 350, 870 micron Spitzer/IRS 5.4-35 micron	Catalog Search Tool Image and Spectrum Server (Atlas) SEDs Quick Look IPAC Table Program Interface
SED Fits Catalog	Best-fit parameters, including SED class, luminosity, temperature, disk radius, envelope mass, inclination angle, etc.	Catalog Search Tool Image and Spectrum Server (Atlas) SEDs Quick Look IPAC Table Program Interface
SED Models	Tables of model fits to each HOPS YSO	Image and Spectrum Server (Atlas) Browseable Directory
HOPS ID Catalog	ID, ra, dec for HOPS targets	IPAC Table

HOPS Documentation

General	Images	Catalogs
Data Delivery Document	HOPS PACS README	HOPS SED Data Catalog Definitions HOPS SED Fits Catalog Definitions