Multi-epoch infrared photometry of the star forming region G173.58+2.45

Abstract

We present a multi-epoch infrared photometric study of the intermediate-mass star forming region G173.58+2.45. Photometric observations are obtained using the near-infrared $JHK{L}^{\prime }{M}^{\prime }$ filters and narrow-band filters centered at the wavelengths of H${}_2$ (1-0) S(1) (2.122 $\mu$m) and [FeII] (1.644 $\mu$m) lines. The H${}_2$ image shows molecular emission from shocked gas, implying the presence of multiple star formation and associated outflow activity. We see evidence for several collimated outflows. The most extended jet is at least 0.25 pc in length and has a collimation factor of $\sim$ 10, which may be associated with a binary system within the central cluster, resolved for the first time here. This outflow is found to be episodic; probably occurring or getting enhanced during the periastron passage of the binary. We also find that the variable star in the vicinity of the outflow source, which was known as a FU Ori type star, is probably not a FU Ori object. However, it does drive a spectacular outflow and the variability is likely to be related to accretion, when large clouds of gas and dust spiral in towards the central source. Many other convincing accretion-outflow systems and YSO candidates are discovered in the field.

15 pages, 9 figures, accepted for publication in MNRAS

References in corpus (2)

• L' and M' Standard Stars for the Mauna Kea Observatories Near-Infrared System
• Massive molecular outflows at high spatial resolution

Cited by in corpus (8)

• A near IR imaging survey of intermediate and high-mass young stellar outflow candidates
• A General Catalogue of Molecular Hydrogen Emission-Line Objects (MHOs) in Outflows from Young Stars
• Extreme Infrared Variables from UKIDSS - I. A Concentration in Star Forming Regions
• A possible sequential star formation in the giant molecular cloud G174+2.5
• Star formation towards the southern Cometary HII region IRAS 17256-3631
• Initial phases of high-mass star formation: A multiwavelength study towards the extended green object G12.42+0.50
• Star-forming Region Sh 2-233IR I. Deep NIR Observations toward the Embedded Stellar Clusters
• Evidence for a Cloud-Cloud Collision in Sh2-233 Triggering the Formation of the High-mass Protostar Object IRAS 05358+3543