Hub-filament system in IRAS 05480+2545: young stellar cluster and 6.7 GHz methanol maser

Abstract

To probe the star formation (SF) process, we present a multi-wavelength study of IRAS 05480+2545 (hereafter I05480+2545). Analysis of Herschel data reveals a massive clump (M_clump ~ 1875 Msun; peak N(H_2) ~ 4.8 x 10^{22} cm^{-2}; A_V ~ 51 mag) containing the 6.7 GHz methanol maser and I05480+2545, which is also depicted in a temperature range of 18-26 K. Several noticeable parsec-scale filaments are detected in the Herschel 250 microns image and seem to be radially directed to the massive clump. It resembles more of a "hub-filament" system. Deeply embedded young stellar objects (YSOs) have been identified using the 1-5 microns photometric data, and a significant fraction of YSOs and their clustering are spatially found toward the massive clump, revealing the intense SF activities. An infrared counterpart (IRc) of the maser is investigated in the Spitzer 3.6-4.5 microns images. The IRc does not appear point-like source and is most likely associated with the molecular outflow. Based on the 1.4 GHz and Halpha continuum images, the ionized emission is absent toward the IRc, indicating that the massive clump harbors an early phase of massive protostar before the onset of an ultracompact H II region. Together, the I05480+2545 is embedded in a very similar "hub-filament" system to those seen in Rosette Molecular Cloud. The outcome of the present work indicates the role of filaments in the formation of the massive star-forming clump and cluster of YSOs, which might help channel material to the central hub configuration and the clump/core.

arXiv comment14 pages, 8 figures, 1 table, Accepted for publication in The Astrophysical Journal

References in corpus (31)

• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• The UKIRT Infrared Deep Sky Survey (UKIDSS)
• The Photodetector Array Camera and Spectrometer (PACS) on the Herschel Space Observatory
• The Herschel-SPIRE instrument and its in-flight performance
• From filamentary clouds to prestellar cores to the stellar IMF: Initial highlights from the Herschel Gould Belt survey
• A Spitzer Survey of Young Stellar Clusters within One Kiloparsec of the Sun: Cluster Core Extraction and Basic Structural Analysis
• MAMBO Mapping of Spitzer c2d Small Clouds and Cores
• Filamentary structure of star-forming complexes
• Global collapse of molecular clouds as a formation mechanism for the most massive stars
• Infrared Extinction Toward Nearby Star-Forming Regions
• Cluster-formation in the Rosette molecular cloud at the junctions of filaments
• The Spatial Distribution of Star Formation in the Solar Neighbourhood: Do all stars form in clusters?
• The Bolocam Galactic Plane Survey: Survey Description and Data Reduction
• ATLASGAL --- Environments of 6.7\,GHz methanol masers
• Giant Molecular Filaments in the Milky Way
• Ionizing feedback from massive stars in massive clusters: Fake bubbles and untriggered star formation
• ATLASGAL -- A Galaxy-wide sample of dense filamentary structures
• Characterizing filaments in regions of high-mass star formation: High-resolution submilimeter imaging of the massive star-forming complex NGC 6334 with ArTéMiS
• Gravitational fragmentation caught in the act: the filamentary Musca molecular cloud
• Cluster Formation Triggered by Filament Collisions in Serpens South
• A Millimeter Continuum Survey for Massive Protoclusters in the Outer Galaxy
• A multi-wavelength study of star formation activity in the S235 complex
• Fragmentation in filamentary molecular clouds
• Physical environment of massive star-forming region W42
• Multi-wavelength study of the star-formation in the S237 H II region
• Performing edge detection by difference of Gaussians using q-Gaussian kernels
• Study of morphology and stellar content of the Galactic HII region IRAS 16148-5011
• Sh2-138: Physical environment around a small cluster of massive stars
• The physical environment around IRAS 17599-2148: infrared dark cloud and bipolar nebula
• Massive young stellar object W42-MME: The discovery of an infrared jet using VLT/NACO near-infrared images
• Multiwavelength study of low-luminosity 6.7-GHz methanol masers

Cited by in corpus (17)

• Unifying low and high mass star formation through density amplified hubs of filaments
• New insights in the HII region G18.88-0.49: hub-filament system and accreting filaments
• Observational signatures of end-dominated collapse in the S242 filamentary structure
• Star-forming sites IC 446 and IC 447: an outcome of end-dominated collapse of Monoceros R1 filament
• The structure and characteristic scales of molecular clouds
• Simultaneous evidence of edge collapse and hub-filament configurations: A rare case study of a Giant Molecular Filament G45.3+0.1
• AFGL 5180 and AFGL 6366S: sites of hub-filament systems at the opposite edges of a filamentary cloud
• Sh 2-301: a blistered H II region undergoing star formation
• New evidences in IRDC G333.73+0.37: colliding filamentary clouds, hub-filament system, and embedded cores
• Filamentary Structures and Star Formation Activities in the Sites S234, V582, and IRAS 05231+3512
• Investigating inner and large scale physical environments of IRAS 17008-4040 and IRAS 17009-4042 toward l = 345.5 deg, b = 0.3 deg
• Unraveling the inner substructure of new candidate hub-filament system in the HII region G25.4NW
• Star-forming site RAFGL 5085: Is a perfect candidate of hub-filament system ?
• Evidence of interacting elongated filaments in the star-forming site AFGL 5142
• Structure and Kinematics of Sh2-138 -- A distant hub-filament system in the outer Galactic plane
• Embedded filaments in IRAS 05463+2652: early stage of fragmentation and star formation activities
• Ionized filaments and ongoing physical processes in massive star-forming sites around l = 345.5 degree