SIMBAD references

2023ApJS..266...32P - Astrophys. J., Suppl. Ser., 266, 32 (2023/June-0)

Extension of HOPS out to 500 pc (eHOPS). I. Identification and Modeling of Protostars in the Aquila Molecular Clouds.

POKHREL R., MEGEATH S.T., GUTERMUTH R.A., FURLAN E., FISCHER W.J., FEDERMAN S., TOBIN J.J., STUTZ A.M., HARTMANN L., OSORIO M., WATSON D.M., STANKE T., MANOJ P., NARANG M., ATNAGULOV P., HABEL N. and ZAKRI W.

Abstract (from CDS):

We present a Spitzer/Herschel focused survey of the Aquila molecular clouds (d ∼ 436 pc) as part of the eHOPS (extension of the Herschel orion protostar survey, or HOPS, Out to 500 ParSecs) census of nearby protostars. For every source detected in the Herschel/PACS bands, the eHOPS-Aquila catalog contains 1-850 μm SEDs assembled from the Two Micron All Sky Survey, Spitzer, Herschel, the Wide-field Infrared Survey Explorer, and James Clerk Maxwell Telescope/SCUBA-2 data. Using a newly developed set of criteria, we classify objects by their SEDs as protostars, pre-main-sequence stars with disks, and galaxies. A total of 172 protostars are found in Aquila, tightly concentrated in the molecular filaments that thread the clouds. Of these, 71 (42%) are Class 0 protostars, 54 (31%) are Class I protostars, 43 (25%) are flat-spectrum protostars, and four (2%) are Class II sources. Ten of the Class 0 protostars are young PACS bright red sources similar to those discovered in Orion. We compare the SEDs to a grid of radiative transfer models to constrain the luminosities, envelope densities, and envelope masses of the protostars. A comparison of the eHOPS-Aquila to the HOPS protostars in Orion finds that the protostellar luminosity functions in the two star-forming regions are statistically indistinguishable, the bolometric temperatures/envelope masses of eHOPS-Aquila protostars are shifted to cooler temperatures/higher masses, and the eHOPS-Aquila protostars do not show the decline in luminosity with evolution found in Orion. We briefly discuss whether these differences are due to biases between the samples, diverging star formation histories, or the influence of environment on protostellar evolution.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Star formation - Protostars - Molecular clouds - Infrared astronomy - Young stellar objects - Astronomy data modeling - Far infrared astronomy - Pre-main sequence stars - Catalogs - Surveys

VizieR on-line data: <Available at CDS (J/ApJS/266/32): table2.dat table3.dat table4.dat table7.dat table8.dat table9.dat table10.dat table11.dat table12.dat table13.dat table14.dat table15.dat table16.dat table17.dat>

Status at CDS : Examining the need for a new acronym. // Tables of objects will be appraised for possible ingestion in SIMBAD.

Simbad objects: 36

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