Time and polarization radiation characteristics PSR J0242+6256 at decameter range
|1Ulyanov, OM, 1Shevtsova, AI, 1Zakharenko, VV, 1Skoryk, AO, 1Vasylieva, IY, 1Plakhov, MS |
1Institute of Radio Astronomy of the National Academy of Sciences of Ukraine, Kharkiv, Ukraine
|Kinemat. fiz. nebesnyh tel (Online) 2018, 34(4):14-29|
|Start Page: Physics of Stars and Interstellar Medium|
The characteristics of anomalously intense pulses of the pulsar J0242 + 6256 in the decameter wavelength range are studied in the paper. Observations were made using the UTR-2 radio telescope in October 2014. The dispersion measure for the pulsar was precised. For the first time such characteristics as the scattering time constant, the scattering measure and the rotation measure towards the pulsar were determined. Also, the rapid changes in the rotation measure along the profiles of individual anomalously intense pulses were considered. The obtained characteristics show that, despite the small dispersion measure and the close arrangement to the Earth, the scattering measure towards the pulsar is large. Rapid changes in the rotation measure along the pulse profiles of this pulsar possibly are due to the presence of a plasma with rapidly changing parameters near the pulsar.
|Keywords: dispersion measure, polarization, pulsar, rotation measure, scattering measure|
1.Ya. Yu. Vasil’eva, V. V. Zakharenko, A. A. Konovalenko, F. Zarka, O. M. Ul’yanov, A. I. Shevtsova, and A. O. Skorik, “A decameter survey of the Northern sky with the goal of search for pulsars and sources of transient radiation. First results,” Radiofiz. Radioastron. 19, 197–205 (2014).
2.A. A. Skorik, O. M. Ul’yanov, V. V. Zakharenko, A. I. Shevtsova, Ya. Yu. Vasil’eva, M. S. Plakhov, and I. P. Kravtsov, “The fine structure of the anomalously intense pulses of the pulsar J0814 + 7429 in the decameter wave band,” Radiofiz. Radioastron. 22, 93–111 (2017).
3.O. M. Ul’yanov, A. Deshpande, V. V. Zakharenko, and A. Asgekar, “Two-frequency observations of six pulsars using UTR-2 and GEETEE radiotelescopes,” Radiofiz. Radioastron. 12, 5–20 (2007).
4.O. M. Ul’yanov, V. V. Zakharenko, A. A. Konovalenko, A. Lekasho, K. Rozolen, and X. O. Ruker, “Detection of individual impulses of pulsars B0809+74; B0834+06; B0943+10; B0950+08; B1133+16 in the decameter wave band,” Radiofiz. Radioastron. 11, 113–134 (2006).
5.O. M. Ul’yanov, A. I. Shevtsova, and A. O. Skorik, “Algorithms for determining the polarization parameters of the radio emission of pulsars,” Radiofiz. Radioastron. 19, 101–110 (2014).
6.O. M. Ul’yanov, A. I. Shevtsova, and A. A. Skorik, “Polarization probing of pulsar magnetosphere,” Izv. Krym. Astrofiz. Obs. 109, 159–168 (2013).
7.E. P. Abranin, Y. M. Bruck, V. V. Zakharenko, and A. A. Konovalenko, “The new preamplification system for the UTR-2 Radio Telescope,” Exp. Astron. 11, 85–112 (2001).
8.ATNF Pulsar Catalog (2015). http://www.atnf.csiro.au/people/pulsar/psrcat/.
9.J. Boyles, R. S. Lynch, S. M. Ransom, et al., “The Green Bank Telescope 350 MHz driftscan survey. I. Survey observations and the discovery of 13 pulsars,” Astrophys. J. 763, 80 (2013).
10.S. I. Braude, A. V. Men, and L. G. Sodin, “The UTR-2 decametric-wave radio telescope,” Antenny 26, 3–15 (1978).
11.Y. M. Bruk, O. M. Ulyanov, and B. Y. Ustimenko, “Detection and investigation of the radio emission of the pulsar PSR 1530+27 at 25 MHz,” Sov. Astron. 30, 574 (1986).
12.Y. M. Bruk, O. M. Ulyanov, and B. Y. Ustimenko, “A method of determining the dispersion measure of pulsar radio emission,” Sov. Astron. 31, 389 (1987).
13.T. Coenen, J. van Leeuwen, J. W. T. Hessels, et al., “The LOFAR pilot surveys for pulsars and fast radio transients,” Astron. Astrophys. 570, A60 (2014).
14.J. M. Cordes and T. J. W. Lazio, “NE2001.1. A new model for the galactic distribution of free electrons and its fluctuations” (2002). arXiv astro-ph/ 0207156
15.T. H. Hankins and B. J. Rickett, “Pulsar signal processing,” Meth. Comput. Phys. 14, 55–129 (1975).
16.J. W. T. Hessels, S. M. Ransom, V. M. Kaspi, et al., “The GBT350 survey of the Northern Galactic Plane for radio pulsars and transients,” in 40 Years of Pulsars: Millisecond Pulsars, Magnetars, and More, Ed. by C. Bassa, Z. Wang, A. Cumming, and V. M. Kaspi (American Inst. of Physics, Melville, NY, 2008), in Ser.: AIP Conference Proceedings, Vol. 983, pp. 613–615.
17.A. Konovalenko, L. Sodin, V. Zakharenko, et al., “The modern radio astronomy network in Ukraine: UTR-2, URAN and GURT,” Exp. Astron. 42, 11–18 (2016).
18.I. P. Kravtsov, V. V. Zakharenko, I. Y. Vasylieva, et al., “Parameters of the transient signals detected in the decameter survey of the northern sky,” Odessa Astron. Publ. 29, 179–183 (2016).
19.A. D. Kuzmin, “Giant pulses of pulsar radio emission,” Astrophys. Space Sci. 308, 563–567 (2007).
20.A. D. Kuzmin and A. A. Ershov, “Detection of giant radio pulses from the pulsar PSR B0656+14,” Astron. Lett. 32, 583–587 (2006).
21.R. S. Lynch, J. Boyles, S. M. Ransom, et al., “The Green Bank Telescope 350 MHz drift-scan survey II: Data analysis and the timing of 10 new pulsars, including a relativistic binary,” Astrophys. J. 763, 81 (2013).
22.V. M. Malofeev, J. A. Gil, A. Jessner, et al., “Spectra of 45 pulsars,” Astron. Astrophys. 285, 201–208 (1994).
23.V. M. Malofeev, O. I. Malov, and N. B. Shchegoleva, “Discovery of a burst in one pulse component in the pulsar PSR B0643+80,” Astron. Rep. 42, 241–245 (1998).
24.I. F. Malov, V. M. Malofeev, and D. S. Sen’e, “Observed total radio luminosities of 232 pulsars,” Astron. Rep. 38, 677–682 (1994).
25.I. F. Malov, O. I. Malov, and V. M. Malofeev, “The investigations of pulsar integrated radio luminosities,” Astron. Astrophys. Trans. 10, 205–210 (1996).
26.R. N. Manchester, G. V. Hobbs, A. Teoh, and M. Hobbs, “The Australia telescope national facility pulsar catalogue,” Astron. J. 129, 1993–2006 (2005).
27.A. V. Megn, L. G. Sodin, N. K. Sharykin, and Yu. M. Bruk, “The principles of the construction and characteristics of the radio telescope UTR-2 antennas,” Antenny 26, 15–57 (1978).
28.D. B. Melrose, “Propagation effects on the polarization of pulsar radio emission,” Austral. J. Phys. 32, 61–70 (1979).
29.A. Noutsos, A. Karastergiou, M. Kramer, et al., “Phase-resolved Faraday rotation in pulsars,” Mon. Not. R. Astron. Sci. 396, 1559–1572 (2009).
30.A. Noutsos, C. Sobey, V. I. Kondratiev, et al., “Pulsar polarisation below 200 MHz: Average profiles and propagation effects,” Astron. Astrophys. 576, A62 (2015).
31.S. A. Petrova, “On the origin of orthogonal polarization modes in pulsar radio emission,” Astron. Astrophys. 378, 883–897 (2001).
32.S. A. Petrova, “The influence of magnetospheric refraction on the apparent spatial structure of a pulsar emission region,” Mon. Not. R. Astron. Sci. 324, 931–936 (2001).
33.S. A. Petrova, “Diagnostics of the plasma of pulsar magnetospheres based on polarization profiles of radio pulses,” Astron. Astrophys. 408, 1057–1063 (2003).
34.S. A. Petrova, “Polarization transfer in a pulsar magnetosphere,” Mon. Not. R. Astron. Sci. 366, 1539–1550 (2006).
35.S. A. Petrova, “Statistics of the individual-pulse polarization based on propagation effects in the pulsar magnetosphere,” Mon. Not. R. Astron. Sci. 368, 1764–1772 (2006).
36.S. A. Petrova and Y. E. Lyubarskii, “Propagation effects in pulsar magnetospheres,” Astron. Astrophys. 355, 1168–1180 (2000).
37.M. V. Popov, A. D. Kuz’min, O. M. Ul’yanov, et al., “Instantaneous radio spectra of giant pulses from the crab pulsar from decimeter to decameter wavelengths,” Astron. Rep. 50, 562–568 (2006).
38.V. V. Ryabov, D. M. Vavriv, P. Zarka, et al., “A low-noise, high-dynamic-range, digital receiver for radio astronomy applications: An efficient solution for observing radio-bursts from Jupiter, the Sun, pulsars, and other astrophysical plasmas below 30 MHz,” Astron. Astrophys. 510, A16 (2010).
39.M. A. Sidorchuk, O. M. Ulyanov, D. V. Shepelev, et al., “Large-scale structure of the Northern sky at decametric waves,” Presented at Scientific Workshop — Astrophysics with E-LOFAR, 2008.
40.O. M. Ulyanov, A. I. Shevtsova, D. V. Mukha, and A. A. Seredkina, “Investigation of the Earth ionosphere using the radio emission of pulsars,” Balt. Astron. 22, 53–65 (2013).
41.O. M. Ulyanov, A. I. Shevtsova, and A. A. Seredkina, “Polarization sounding of the pulsar magnetosphere,” in Proc. Neutron Stars and Pulsars: Challenges and Opportunities after 80 Years, Beijing, China, August 2012 (Cambridge Univ. Press, Cambridge, 2013), in Ser.: IAU Symposium Proceedings, Vol. 291, pp. 530–532.
42.O. M. Ulyanov, A. I. Shevtsova, and A. O. Skoryk, “Polarization sounding of pulsar magnetosphere (Part I)” (2014). arXiv 1411.6453
43.O. M. Ulyanov, A. O. Skoryk, A. I. Shevtsova, et al., “Detection of the fine structure of the pulsar J0953+0755 radio emission in the decametre wave range,” Mon. Not. R. Astron. Sci. 455, 150–157 (2016).
44.O. M. Ul’yanov and V. V. Zakharenko, “Energy of anomalously intense pulsar pulses at decameter wavelengths,” Astron. Rep. 56, 417–429 (2012).
45.O. M. Ul’yanov, V. V. Zakharenko, and Y. M. Bruk, “The parameters of pulsar subpulse emission at decameter wavelengths,” Astron. Rep. 52, 917–924 (2008).
46.A. S. Volokitin, V. V. Krasnoselskikh, and G. Z. Machabeli, “Waves in the relativistic electron–positron plasma of a pulsar,” Sov. J. Plasma Phys. 11, 310–314 (1985).
47.V. Zakharenko, A. Konovalenko, P. Zarka, et al., “Digital receivers for low-frequency radio telescopes UTR-2, URAN, GURT,” J. Astron. Instrum. 5, 1641010–1641738 (2016).
48.V. V. Zakharenko, N. K. Sharykin, and E. R. Rudavin, “Modernization of commutation devices and an improvement of main parameters of the UTR-2 radio telescope,” Kinematika Fiz. Nebesnykh Tel, Suppl. 5, 90–92 (2005).
49.V. V. Zakharenko, I. Y. Vasylieva, A. A. Konovalenko, et al., “Detection of decameter-wavelength pulsed radio emission of 40 known pulsars,” Mon. Not. R. Astron. Sci. 431, 3624–3641 (2013).