eHOPS SED Fits Catalog Definitions


The Extension of HOPS Out to 500 ParSecs (eHOPS) project used archival data to survey all the major star forming molecular clouds within 500 pc of the Sun, except Orion (which was surveyed by HOPS). For every source detected in the Herschel/PACS bands, the eHOPS SED catalogs contain 1-850 micron SEDs assembled from 2MASS, Spitzer, Herschel, WISE, and JCMT/SCUBA-2 data. eHOPS compares the SEDs to a grid of radiative transfer models to constrain the luminosities, envelope densities, and envelope masses of the protostars.

To query for all sources in a molecular cloud, do an All Sky Search with an SQL Constraint (bottom of search page) on eHOPS_ID, for example "eHOPS_ID like 'eHOPS-oph%'" for all sources in Ophiuchus. Or simply do an All Sky Search and filter the eHOPS_ID column of the results table. The ID strings for each cloud are:

Cloud NameCloud ID

If you use eHOPS Aquila data please cite Pokhrel et al. 2023.

Name Intype Units Description
eHOPS_ID char eHOPS ID number
ra double degrees Right Ascension (J2000)
dec double degrees Declination (J2000)
Class char SED class
Lbol double Lsun Bolometric luminosity
Tbol double K Bolometric temperature
n double 4.5-24 micron spectral index
Ltot double Lsun Best fit total luminosity
Rdisk int AU Best fit disk (centrifugal) radius
rho1000 double Best fit reference density at 1000 AU
Menv double Msun Best fit envelope mass within 2500 AU
theta int degrees Best fit cavity opening angle
inc int degrees Best fit inclination angle
AV float mag Best fit foreground extinction in the V band
factor float Best fit scaling factor for model fluxes
R double Best fit R value