The uGMRT observations of three new GPS pulsars
arXiv:2109.04816 · doi:10.3847/1538-4357/ac23dc
Abstract
We report the detailed spectral measurements over a wide frequency range of three pulsars: J1741-3016, J1757-2223 and J1845-0743, using the Giant Metrewave Radio Telescope, which allowed us to identify them as a new gigahertz-peaked spectra pulsars. Our results indicate that their spectra show turnovers at frequencies of 620 MHz, 640 MHz and 650 MHz, respectively. Our analysis proves that wide-band observations improve the estimation of the spectral nature using a free-free thermal absorption model and thus allow a more accurate approximation of the maximum energy in the spectrum. While there is no evidence as of yet that these objects are associated with a supernova remnant or pulsar wind nebula, they are good targets for looking for interesting environments in the future, more sensitive sky surveys.
arXiv commentAccepted to ApJ
References in corpus (30)
- The Evolution and Structure of Pulsar Wind Nebulae
- An Accurate Flux Density Scale from 1 to 50 GHz
- Pulsar spectra of radio emission
- Spectral properties of 441 radio pulsars
- The Parkes Multibeam Pulsar Survey -- II. Discovery and Timing of 120 Pulsars
- Polarimetry of 600 pulsars from observations at 1.4 GHz with the Parkes radio telescope
- A real-time software backend for the GMRT
- Pulsar bow-shock nebulae. II. Hydrodynamical simulation
- The Einstein@Home search for radio pulsars and PSR J2007+2722 discovery
- Dispersion measure variations in a sample of 168 pulsars
- Pulsars with gigahertz-peaked spectra
- The Green Bank North Celestial Cap Pulsar Survey. V. Pulsar Census and Survey Sensitivity
- On gigahertz spectral turnovers in pulsars
- Simultaneous Multi-band Radio & X-ray Observations of the Galactic Center Magnetar SGR 17452900
- Turn-over in pulsar spectra around 1 GHz
- A census of the pulsar population observed with the international LOFAR station FR606 at low frequencies (25-80~MHz)
- Low frequency spectral energy distributions of radio pulsars detected with the Murchison Widefield Array
- Flux-density spectral analysis for several pulsars and two newly-identified gigahertz-peaked spectra
- A LOFAR census of non-recycled pulsars: extending below 80 MHz
- Gigahertz-peaked spectra pulsars and thermal absorption model
- Thermal absorption as the cause of gigahertz-peaked spectra in pulsars and magnetars
- Spectrum evolution in binary pulsar B1259-63/LS 2883 Be star and gigahertz-peaked spectra
- Do radio magnetars J1550-5418 and J1622-4950 have gigahertz-peaked spectra?
- Time variation in the low frequency spectrum of Vela-like pulsar B1800-21
- Flux density measurements of GPS candidate pulsars at 610 MHz using interferometric imaging technique
- Gigahertz-peaked spectra pulsars in Pulsar Wind Nebulae
- Wide Integral-Field Infrared Spectroscopy of the Bright [Fe II] Shell in the Young Supernova Remnant G11.2-0.3
- Evolution of HII regions in hierarchically structured molecular clouds
- Multi-frequency observations and spectral analysis of two gigahertz-peaked spectra pulsars
- The significance of low frequency interferometric observations for the GPS pulsar flux estimation: the case of J1740+1000