Non-thermal emission from massive star forming regions: A possible SNR candidate G351.7-1.2?

Abstract

We present low frequency wide band observations (300-500 MHz) of the star forming complex G351.7-1.2 using upgraded Giant Metrewave Radio Telescope (uGMRT), India. Combining this with the optical, infrared and submillimeter data, we analyse the large scale diffuse radio emission associated with the region that exhibits a broken shell morphology. The spectral index of the emission in the shell is -0.8, indicating non-thermal emission. H-alpha emission that mimics the morphology of the radio shell on a smaller scale is also detected here. Based on the non-thermal emission from the radio shell and the presence of its optical counterpart, we classify G351.7-1.2 as a candidate SNR. A gamma-ray source detected by Fermi LAT (1FGLJ1729.1-3641c) is located towards the south-west of the radio shell and could have a possible origin in the interaction between high velocity particles from the SNR and the ambient molecular cloud.

arXiv comment12 pages, 11 figures, accepted for publication in MNRAS

References in corpus (35)

• The Photodetector Array Camera and Spectrometer (PACS) on the Herschel Space Observatory
• The Herschel-SPIRE instrument and its in-flight performance
• GLIMPSE: I. A SIRTF Legacy Project to Map the Inner Galaxy
• ATLASGAL - The APEX Telescope Large Area Survey of the Galaxy at 870 microns
• Hi-GAL: the Herschel infrared Galactic Plane Survey
• SUMSS: A Wide-Field Radio Imaging Survey of the Southern Sky. I. Science goals, survey design and instrumentation
• The WISE Catalog of Galactic HII Regions
• The Aao/Ukst Supercosmos H-alpha Survey (SHS)
• A Spitzer Space Telescope Infrared Survey of Supernova Remnants in the Inner Galaxy
• Signatures of the Youngest Starbursts: Optically-thick Thermal Bremsstrahlung Radio Sources in Henize 2-10
• Radio emission from Supernova Remnants
• The radio emission from the Galaxy at 22 MHz
• All-sky Galactic radiation at 45 MHz and spectral index between 45 and 408 MHz
• Radio Continuum and Recombination Line Study of UC HII Regions with Extended Envelopes
• RCW 86: A Type Ia Supernova in a Wind-Blown Bubble
• Dust Destruction in Fast Shocks of Core-Collapse Supernova Remnants in the Large Magellanic Cloud
• A Herschel study of the properties of starless cores in the Polaris Flare dark cloud region using PACS and SPIRE
• Dust in Historical Galactic Type Ia Supernova Remnants with Herschel
• Radio Spectral Index Variations and Physical conditions in Kepler's Supernova Remnant
• SN 1987A After 18 Years: Mid-Infrared GEMINI and SPITZER Observations of the Remnant
• GMRT observations of X-shaped radio sources
• The ATLASGAL survey: distribution of cold dust in the Galactic plane. Combination with Planck data
• Synchrotron-Loss Spectral Breaks in Pulsar-Wind Nebulae and Extragalactic Jets
• Refining the associations of the Fermi Large Area Telescope Source Catalogs
• Deciphering the ionized gas content in the massive star forming complex G75.78+0.34
• Deuteration around the ultracompact HII region Mon R2
• Radio continuum and HI observations of supernova remnant G296.8-00.3
• Star formation towards the southern Cometary HII region IRAS 17256-3631
• First detection of optical light from SNR G279.0+1.1
• Detection of a new, low-brightness supernova remnant possibly associated with EGRET sources
• Star forming activity in the H II regions associated with IRAS 17160-3707 complex
• On the existence of "radio thermally active" Galactic supernova remnants
• Infrared dust bubble CS51 and its interaction with the surrounding interstellar medium
• Star formation activity in the southern Galactic HII region G351.63-1.25
• Gas Kinematics in the HII regions G351.69-1.15 and G351.63-1.25

Cited by in corpus (4)

• The physical and chemical structure of Sagittarius B2 -- V. Non-thermal emission in the envelope of Sgr B2
• The Black Hole Candidate Swift J1728.9$-$3613 and the Supernova Remnant G351.9$-$0.9
• Metrewave Galactic Plane with the uGMRT (MeGaPluG) Survey: Lessons from the Pilot Study
• High Velocity HI Jet-like Feature Towards the SNR Candidate G351.7-1.2