TRAPUM search for pulsars in supernova remnants and pulsar wind nebulae -- I. Survey description and initial discoveries

Abstract

We present the description and initial results of the TRAPUM (TRAnsients And PUlsars with MeerKAT) search for pulsars associated with supernova remnants (SNRs), pulsar wind nebulae and unidentified TeV emission. The list of sources to be targeted includes a large number of well-known candidate pulsar locations but also new candidate SNRs identified using a range of criteria. Using the 64-dish MeerKAT radio telescope, we use an interferometric beamforming technique to tile the potential pulsar locations with coherent beams which we search for radio pulsations, above a signal-to-noise of 9, down to an average flux density upper limit of 30 $\mu$Jy. This limit is target-dependent due to the contribution of the sky and nebula to the system temperature. Coherent beams are arranged to overlap at their 50 per cent power radius, so the sensitivity to pulsars is not degraded by more than this amount, though realistically averages around 65 per cent if every location in the beam is considered. We report the discovery of two new pulsars; PSR J1831$-$0941 is an adolescent pulsar likely to be the plerionic engine of the candidate PWN G20.0+0.0, and PSR J1818$-$1502 appears to be an old and faint pulsar that we serendipitously discovered near the centre of a SNR already hosting a compact central object. The survey holds importance for better understanding of neutron star birth rates and the energetics of young pulsars.

17 pages, 6 figures, 3 tables. Accepted for publication in Monthly Notices of the Royal Astronomical Society

References in corpus (55)

• TEMPO2, a new pulsar timing package. I: Overview
• A New Electron Density Model for Estimation of Pulsar and FRB Distances
• PSRCHIVE and PSRFITS An Open Approach to Radio Pulsar Data Storage and Analysis
• Incremental Fermi Large Area Telescope Fourth Source Catalog
• The Parkes multibeam pulsar survey: VI. Discovery and timing of 142 pulsars and a Galactic population analysis
• 45 Years of Rotation of the Crab Pulsar
• Pulsar Wind Nebulae in the Chandra Era
• On the birthrates of Galactic neutron stars
• The FAST Galactic Plane Pulsar Snapshot survey: I. Project design and pulsar discoveries
• Discovery of 35 New Supernova Remnants in the Inner Galaxy
• Peta-electron volt gamma-ray emission from the Crab Nebula
• A Dynamical Model for the Evolution of a Pulsar Wind Nebula inside a Non-Radiative Supernova Remnant
• The MeerKAT Telescope as a Pulsar Facility: System verification and early science results from MeerTime
• The Five-hundred-meter Aperture Spherical Radio Telescope (FAST) Project
• Galactic Supernova Remnant Candidates Discovered by THOR
• Central Compact Objects in Supernova Remnants
• Discovery of a 112 ms X-ray Pulsar in Puppis A: Further Evidence of Neutron Stars Weakly Magnetized at Birth
• Pulsar Wind Nebulae Created by Fast-Moving Pulsars
• The distance and neutral environment of the massive stellar cluster Westerlund 1
• A comparison of Galactic electron density models using PyGEDM
• Gamma-ray halos around pulsars as the key to understanding cosmic ray transport in the Galaxy
• The analysis of the largest sample of multi-frequency pulsar scatter time estimates
• The MPIfR-MeerKAT Galactic Plane survey I -- System setup and early results
• The Thousand-Pulsar-Array program on MeerKAT -- IX. The time-averaged properties of the observed pulsar population
• The Thousand-Pulsar-Array programme on MeerKAT: -- VI. Pulse widths of a large and diverse sample of radio pulsars
• The (Re-)Discovery of G350.1-0.3: A Young, Luminous Supernova Remnant and Its Neutron Star
• A global view on star formation: The GLOSTAR Galactic plane survey. II. Supernova Remnants in the first quadrant of the Milky Way
• A New Young Galactic Supernova Remnant Containing a Compact Object: G15.9+0.2
• Wide field beamformed observation with MeerKAT
• Discovery of the energetic pulsar J1747-2809 in the supernova remnant G0.9+0.1
• Distances to the Supernova Remnants in the Inner Disk
• Extending the Event-weighted Pulsation Search to Very Faint Gamma-ray Sources
• Mysterious Odd Radio Circle near the Large Magellanic Cloud -- An Intergalactic Supernova Remnant?
• The radio SNR G65.1+0.6 and its associated pulsar J1957+2831
• The Thousand-Pulsar-Array programme on MeerKAT -- V. Scattering analysis of single-component pulsars
• New candidate radio supernova remnants detected in the GLEAM survey over $345^{\circ }<l<60^{\circ }$, $180^{\circ }<l<240^{\circ }$
• The Radio Emission, X-ray Emission, and Hydrodynamics of G328.4+0.2: A Comprehensive Analysis of a Luminous Pulsar Wind Nebula, its Neutron Star, and the Progenitor Supernova Explosion
• A sample of Fast Radio Bursts discovered and localised with MeerTRAP at the MeerKAT telescope
• Population synthesis of pulsar wind nebulae and pulsar halos in the Milky Way -- Predicted contributions to the very-high-energy sky
• High-resolution Near-infrared Spectroscopic Study of Galactic Supernova Remnants. I. Kinematic Distances
• A kinematic study of central compact objects and their host supernova remnants
• PulsarX: a new pulsar searching package -I. A high performance folding program for pulsar surveys
• The Distance Measurements of Supernova Remnants in The Fourth Galactic Quadrant
• X-ray properties of G308.3-1.4 and its central compact object
• A LOFAR search for steep-spectrum pulsars in Supernova Remnants and Pulsar Wind Nebulae
• Expansion and Age of the Supernova Remnant G350.1-0.3: High-Velocity Iron Ejecta from a Core-Collapse Event
• A search for radio pulsars in five nearby supernova remnants
• New composite supernova remnant toward HESS J1844-030?
• Multiwavelength studies of G298.6$-$0.0: An old GeV supernova remnant interacting with molecular clouds
• Optical reconstruction of dust in the region of SNR RX J1713.7-3946 from astrometric data
• A complete radio study of SNR G15.4+0.1 from new GMRT observations
• The revised distance of supernova remnant G15.4+0.1
• Global Sky Models can Improve Flux Estimates in Pulsar and FRB Studies
• MeerKAT caught a Mini Mouse: serendipitous detection of a young radio pulsar escaping its birth sit
• Murchison Widefield Array and XMM-Newton observations of the Galactic supernova remnant G5.9+3.1

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