A nearby pulsar J1951+2837 observed by the LPA and FAST
Близкий пульсар J1951+2837, наблюдавшийся с помощью LPA и FAST
2025-11-18
SCID: 54.1/bk6hdche
Discuss with AI
Five-hundred-meter Aperture Spherical radio Telescope (FAST)Large Phased Array (LPA)PSR J1951+2837bright pulsescoherent timing solutiondispersion measure (DM) = 2.9 pc cm^{-3}low radio luminosityspectral index α = 2.5-3.2
Figures from the paper
Abstract (AI)
PSR J1951+2837 is a nearby pulsar with a period of 7.334 s and dispersion measure of DM = 2.9 $\pm$ 0.6 pc cm$^{-3}$, located about 200 or 300 pc from the Sun. It occasionally radiates bright pulses and has been observed by the Large Phased Array (LPA) radio telescope at 110 MHz and by the Five-hundred-meter Aperture Spherical radio Telescope (FAST) at 1250 MHz. We detected only 343 pulses in 228 LPA observation sessions and 5 bright pulses in two FAST sessions. Based on the times of arrival (TOAs) of these bright pulses, we determined the coherent timing solution for this pulsar at a frequency of 110 MHz. Based on flux densities (S) of these bright pulses at two frequencies ($ν$), we found that it is probably one of the known pulsars with the lowest luminosities to date, with a spectral index of about $α$ = (2.5 - 3.2) for S $\sim ν^{-α}$.
Key Findings
1
A coherent timing solution at 110 MHz was determined using times of arrival (TOAs) of the detected bright pulses.
2
Based on these fluxes and distance, PSR J1951+2837 is likely among the lowest-luminosity known pulsars to date.
3
Flux density measurements at 110 MHz and 1250 MHz imply a steep spectral index α ≈ 2.5–3.2 (S ∼ ν⁻ᵅ).
4
PSR J1951+2837 is a nearby pulsar with period 7.334 s and dispersion measure DM = 2.9 ± 0.6 pc cm⁻³, located about 200–300 pc from the Sun.
5
The pulsar intermittently emits bright pulses; 343 pulses were detected in 228 LPA sessions at 110 MHz and 5 bright pulses in two FAST sessions at 1250 MHz.
Research Object
Research Subject
Publication Details
Publication Date
2025-11-18
Journal
Publisher
ISSN
Cited by
0
Open access PDF
Access Type
Author Information
Download PDF
Subscribe to digest