SIMBAD references

2020ApJ...891...81P - Astrophys. J., 891, 81-81 (2020/March-1)

Stellar cores in the Sh 2-305 H II region.

PANDEY R., SHARMA S., PANWAR N., DEWANGAN L.K., OJHA D.K., BISEN D.P., SINHA T., GHOSH A. and PANDEY A.K.

Abstract (from CDS):

Using our deep optical and near-infrared photometry along with multiwavelength archival data, we here present a detailed study of the Galactic H II region Sh 2-305 to understand the star/star-cluster formation. On the basis of excess infrared emission, we have identified 116 young stellar objects (YSOs) within a field of view of ∼18.'5 x 18.'5 around Sh 2-305. The average age, mass, and extinction (AV) for this sample of YSOs are 1.8 Myr, 2.9 M, and 7.1 mag, respectively. The density distribution of stellar sources along with minimal spanning tree calculations on the location of YSOs reveals at least three stellar subclusterings in Sh 2-305. One cluster is seen toward the center (i.e., Mayer 3), while the other two are distributed toward the north and south directions. Two massive O-type stars (VM2 and VM4; ages ∼5 Myr) are located at the center of the Sh 2-305 H II region. The analysis of the infrared and radio maps traces the photon-dominant regions (PDRs) in Sh 2-305. The association of the younger generation of stars with the PDRs is also investigated in Sh 2-305. This result suggests that these two massive stars might have influenced the star formation history in Sh 2-305. This argument is also supported by the calculation of various pressures driven by massive stars, the slope of the mass function/K-band luminosity function, star formation efficiency, fraction of Class I sources, and mass of the dense gas toward the subclusterings in Sh 2-305.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Interstellar medium - H II regions - Open star clusters - Star formation - Star forming regions

Status at CDS : Examining the need for a new acronym. // Large table(s) will be appraised for possible ingestion in VizieR.

CDS comments: Figure 15: Radio source R1 was not identified.

Simbad objects: 14

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2021.01.24-02:08:35

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