Study of young stellar objects and associated filamentary structures in the inner Galaxy

Abstract

Young Stellar Objects (YSOs) in the inner Galactic region $10^0<l<15^0$ and $-1^0<b<1^0$ are studied using GLIMPSE images and GLIMPSE data catalogue. A total number of 1107 Class I and 1566 Class II sources are identified in this Galactic region. With the help of GLIMPSE 5.8 $\mu$m & 8 $\mu$m images, we have identified the presence of 10 major star forming sites in the Galactic midplane, of which 8 of them are filamentary while 2 are possible clusters of Class I $&$ II sources. The length of the identified filaments are estimated as 8'-33' ($\sim$ 9 - 56 pc). Occurrence of Hub-Filamentary System (HFS) is observed in many filamentary star forming sites. Most of the Class I sources are found to be aligned along the length of these filamentary structures, while Class II sources have a random distribution. Mass and age distribution of 425 Class I and 241 Class II sources associated with filaments & clusters are studied through their SED analysis. Most of the Class I sources detected have mass $>$ 8M${}_{\odot }$, while Class II sources have relatively low mass regime. Class I sources have ages $\le$ 0.5 Myr, while Class II sources have ages in the range $\sim$0.1 - 3 Myr. Along with the help of high mass star forming tracers, we demonstrate that the 10 regions studied here are forming a large number of high-mass stars.

19 pages, 18 figures. Accepted for publication in MNRAS

References in corpus (11)

• A Spitzer Survey of Young Stellar Clusters within One Kiloparsec of the Sun: Cluster Core Extraction and Basic Structural Analysis
• Filamentary structure of star-forming complexes
• A Catalog of Extended Green Objects (EGOs) in the GLIMPSE Survey: A new sample of massive young stellar object outflow candidates
• Spitzer Observations of NGC 1333: A Study of Structure and Evolution in a Nearby Embedded Cluster
• The Co-ordinated Radio and Infrared Survey for High-Mass Star Formation - II. Source Catalogue
• Luminosity Functions of Spitzer Identified Protostars in Nine Nearby Molecular Clouds
• Search for starless clumps in the ATLASGAL survey
• Nitrogen hydrides in interstellar gas II. Analysis of Herschel/HIFI observations towards W49N and G10.6-0.4 (W31C)
• Structure of the hot molecular core G10.47+0.03
• Spitzer-IRAC GLIMPSE of high mass protostellar objects II - SED modelling of a bonafide sample
• High-Mass Star Formation in the Near and Far 3-KPC Arms

Cited by in corpus (3)

• Star Formation Activity in the Long, Filamentary Infrared Dark Cloud G53.2
• YSO jets in the Galactic Plane from UWISH2: V - Jets and Outflows in M17
• Star Formation at the Periphery of a Molecular Superbubble: The Case of G12.79+0.43