A global view on star formation: The GLOSTAR Galactic plane survey. II. Supernova Remnants in the first quadrant of the Milky Way

Abstract

Context. The properties of the population of Galactic supernova remnants (SNRs) are essential to our understanding of the dynamics of the interstellar medium (ISM) in the Milky Way. However, the completeness of the catalog of Galactic SNRs is expected to be only $\sim 30\%$, with on order 700 SNRs yet to be detected. Deep interferometric radio continuum surveys of the Galactic plane help in rectifying this apparent deficiency by identifying low surface brightness SNRs and compact SNRs that have not been detected in previous surveys. However, SNRs are routinely confused with H II regions, which can have similar radio morphologies. Radio spectral index, polarization, and emission at mid-infrared (MIR) wavelengths can help distinguish between SNRs and H II regions. Aims. We aim to identify SNR candidates using continuum images from the Karl G. Jansky Very Large Array GLObal view of the STAR formation in the Milky Way (GLOSTAR) survey. Methods. GLOSTAR is a C-band (4--8 GHz) radio wavelength survey of the Galactic plane covering $358^{\circ }\le l\le 60^{\circ },|b|\le 1^{\circ }$. The continuum images from this survey, which resulted from observations with the most compact configuration of the array, have an angular resolution of $18^{\prime \prime }$. We searched for SNRs in these images to identify known SNRs, previously identified SNR candidates, and new SNR candidates. We study these objects in MIR surveys and the GLOSTAR polarization data to classify their emission as thermal or nonthermal. Results. We identify 157 SNR candidates, of which 80 are new. Polarization measurements provide evidence of nonthermal emission from 9 of these candidates. We find that two previously identified candidates are filaments. We also detect emission from 91 of the 94 known SNRs in the survey region. Four of these are reclassified as H II regions following detection in MIR surveys. (Abridged)

arXiv commentTo be published in A&A. 36 pages, 22 figures in text, 80 figures in Appendix. Revision 1: grammar, position information of one object, other minor changes. Revision 2: added arXiv link to the main GLOSTAR paper

References in corpus (47)

• Astropy: A Community Python Package for Astronomy
• The GMRT 150 MHz All-sky Radio Survey: First Alternative Data Release TGSS ADR1
• The Evolution and Structure of Pulsar Wind Nebulae
• Faraday Rotation Measure Synthesis
• The WISE Catalog of Galactic HII Regions
• A revised catalogue of 294 Galactic supernova remnants
• Observing the Next Galactic Supernova
• Discovery of 35 New Supernova Remnants in the Inner Galaxy
• Radio polarization from the inner Galaxy at arcminute resolution
• Radio emission from Supernova Remnants
• The Radio Lifetime of Supernova Remnants and the Distribution of Pulsar Velocities at Birth
• The population of TeV pulsar wind nebulae in the H.E.S.S. Galactic Plane Survey
• BLOBCAT: Software to Catalogue Flood-Filled Blobs in Radio Images of Total Intensity and Linear Polarization
• A radio spectral index map and catalogue at 147-1400 MHz covering 80 per cent of the sky
• Galactic Supernova Remnant Candidates Discovered by THOR
• On the Origin of Radial Magnetic Fields in Young Supernova Remnants
• A Sino-German lambda6 cm polarization survey of the Galactic plane I. Survey strategy and results for the first survey region
• A Sino-German 6cm polarization survey of the Galactic plane VII. Small supernova remnants
• Structure distribution and turbulence in self-consistently supernova-driven ISM of multiphase magnetized galactic discs
• New Distances to Four Supernova Remnants
• Revised Distances to 21 Supernova Remnants
• DA495 - an aging pulsar wind nebula
• A global view on star formation: The GLOSTAR Galactic Plane Survey. I. Overview and first results for the Galactic longitude range 28° < l < 36°
• GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey II: Galactic Plane $345^{\circ }<l<67^{\circ }$, $180^{\circ }<l<240^{\circ }$
• The HI/OH/Recombination line survey of the inner Milky Way (THOR)
• The Mipsgal View of Supernova Remnants in the Galactic Plane
• GLOSTAR -- Radio Source Catalog I: $28^{\circ }<\text{l}<36^{\circ }$ and $|b|<1^{\circ }$
• Faraday rotation of the supernova remnant G296.5+10.0: Evidence for a Magnetized Progenitor Wind
• Cosmic-ray acceleration and escape from post-adiabatic Supernova remnants
• G181.1+9.5, a new high-latitude low-surface brightness supernova remnant
• Loops and spurs: The angular power spectrum of the Galactic synchrotron background
• The Radio Properties and Magnetic Field Configuration in the Crab-like Pulsar Wind Nebula G54.1+0.3
• Candidate radio supernova remnants observed by the GLEAM survey over $345^{\circ }<l<60^{\circ }$ and $180^{\circ }<l<240^{\circ }$
• Catalogue of known Galactic SNRs uncovered in HAalpa light
• New candidate radio supernova remnants detected in the GLEAM survey over $345^{\circ }<l<60^{\circ }$, $180^{\circ }<l<240^{\circ }$
• Investigating Galactic supernova remnant candidates with LOFAR
• G328.4+0.2 : A large and luminous Crab-like supernova remnant
• A Radio Continuum and Polarisation Study of the pulsar wind nebula CTB87 (G74.9+1.2)
• Confirmation Of Two Galactic Supernova Remnant Candidates Discovered By THOR
• Near-Infrared Spectroscopy of Infrared-Excess Stellar Objects in the Young Supernova Remnant G54.1+0.3
• A Sino-German 6cm polarisation survey of the Galactic plane IX. HII regions
• CO J=1-0 observations of molecular gas interacting with galactic supernova remnants G5.4-1.2, G5.55+0.32 and G5.71-0.08
• G51.04+0.07 and its environment: Identification of a new Galactic supernova remnant at low radio frequencies
• CO J=2-1 Observations toward the Supernova Remnant G54.1+0.3
• Radio and X-ray properties of the source G29.37+0.1 linked to HESS J1844-030
• New composite supernova remnant toward HESS J1844-030?
• Suzaku observations of two diffuse hard X-ray source regions, G22.0+0.0 and G23.5+0.1

Cited by in corpus (27)

• The 1.28 GHz MeerKAT Galactic Center Mosaic
• A global view on star formation: The GLOSTAR Galactic Plane Survey. I. Overview and first results for the Galactic longitude range 28° < l < 36°
• The MPIfR-MeerKAT Galactic Plane survey I -- System setup and early results
• A Catalogue of Radio Supernova Remnants and Candidate Supernova Remnants in the EMU/POSSUM Galactic Pilot Field
• A Global View on Star Formation: The GLOSTAR Galactic Plane Survey V. 6.7 GHz Methanol Maser Catalogue
• A global view on star formation: The GLOSTAR Galactic plane survey VIII. Formaldehyde absorption in Cygnus~X
• COMAP Early Science: VI. A First Look at the COMAP Galactic Plane Survey
• Supernova Remnant Candidates Discovered by the SARAO MeerKAT Galactic Plane Survey
• A global view on star formation: The GLOSTAR Galactic plane survey. IX. Radio Source Catalog III: 2<l<28, 36<l<40, 56<l<60 and |b|<1, VLA B-configuration
• Peering into the Milky Way by FAST: IV. Identification of two new Galactic supernova remnants G203.1+6.6 and G206.7+5.9
• A global view on star formation: The GLOSTAR Galactic plane survey X. Galactic HII region catalog using radio recombination lines
• TRAPUM search for pulsars in supernova remnants and pulsar wind nebulae -- I. Survey description and initial discoveries
• A Catalog of Galactic Supernova Remnants and Supernova Remnant Candidates from the EMU/POSSUM Radio Sky Surveys. I
• Polarized Emission From Four Supernova Remnants In The THOR Survey
• The SARAO MeerKAT Galactic Plane Survey extended source catalogue
• Spitzer and Herschel studies of dust in supernova remnants in the Small Magellanic Cloud
• Possible TeV $\gamma$-ray binary origin of HESS J1828-099
• A Study of GeV Gamma-ray Emission toward Supernova Remnant G51.26+0.11 and Its Molecular Environment
• Cosmological Zoom-In Simulation of Odd Radio Circles as Merger-Driven Shocks in Galaxy Groups
• Supernova remnant candidates identified using MWA Galactic Plane Monitoring over 285deg < l < 70deg and |b| < 16deg
• Search for new Galactic Wolf-Rayet stars using Gaia DR3. I. Candidate selection and the follow-up of the bright sample
• New supernova remnant candidates in the LOFAR Two Metre Sky Survey
• Metrewave Galactic Plane with the uGMRT (MeGaPluG) Survey: Lessons from the Pilot Study
• MeerKAT discovery of 164 compact radio rings toward the Galactic Plane
• GeV emission in the region of the supernova remnant G51.26+0.11
• Heavy interstellar scattering toward the near end of the Galactic bar
• A global view on star formation: The GLOSTAR Galactic plane survey XII. Effelsberg's continuum view and data release