Embedded Filaments in IRAS 05463+2652: Early Stage of Fragmentation and Star Formation Activities

Journal Article · Tue Oct 10 04:00:00 EDT 2017 · Astrophysical Journal

DOI:https://doi.org/10.3847/1538-4357/AA8A79· OSTI ID:22875707

Dewangan, L. K. ^[1]; Devaraj, R. ^[2]; Baug, T.

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1. Physical Research Laboratory, Navrangpura, Ahmedabad—380 009 (India)
2. Instituto Nacional de Astrofísica, Óptica y Electrónica, Luis Enrique Erro # 1, Tonantzintla, Puebla, C.P. 72840, México (Mexico)

We present a multiwavelength data analysis of IRAS 05463+2652 (hereafter I05463+2652) to study star formation mechanisms. A shell-like structure around I05463+2652 is evident in the Herschel column density map, which is not associated with any ionized emission. Based on the Herschel submillimeter images, several parsec-scale filaments (including two elongated filaments, “s-fl” and “nw-fl” having lengths of ∼6.4 and ∼8.8 pc, respectively) are investigated in the I05463+2652 site. The Herschel temperature map depicts all these features in a temperature range of ∼11–13 K. 39 clumps are identified and have masses between ∼70--945 M{sub ⊙}. The majority of clumps (having M{sub clump}≳300 M{sub ⊙}) are distributed toward the shell-like structure. 175 young stellar objects (YSOs) are selected using the photometric 1–5 μm data and a majority of these YSOs are distributed toward the four areas of high column density (≳5×10{sup 21} cm{sup −2}; A {sub V} ∼ 5.3 mag) in the shell-like structure, where massive clumps and a spatial association with filament(s) are also observed. The knowledge of observed masses per unit length of elongated filaments and critical mass length reveals that they are supercritical. The filament “nw-fl” is fragmented into five clumps (having M{sub clump}∼100--545 M{sub ⊙}) and contains noticeable YSOs, while the other filament “s-fl” is fragmented into two clumps (having M{sub clump}∼170--215 M{sub ⊙}) without YSOs. Together, these observational results favor the role of filaments in the star formation process in I05480+2545. This study also reveals the filament “s-fl,” containing two starless clumps, at an early stage of fragmentation.

• OSTI ID: 22875707
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 848; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
COSMIC DUST
CRITICAL MASS
DATA ANALYSIS
DENSITY
EMISSION
FRAGMENTATION
PROTOSTARS
STAR EVOLUTION
STARS
TEMPERATURE RANGE 0000-0013 K