X-ray Halo of the Pulsar 4U 1538–52 from SRG Data

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Abstract

We present the first results of the SRG observation of the pulsar 4U 1538–52 based on ARC-XC and eROSITA data. An extended emission in the form of a halo is detected around the source in the 0.5–8 keV energy band. Our simulation has shown that its surface brightness distribution can be described by a two-component model composed of a flat disk 250 in radius and a b-model with a characteristic size 480. We have constructed a broadband spectrum of 4U 1538–52 in the energy range 0.5–30 keV, which can be fitted by a weakly absorbed (
NH=0,7*1022 cm-2) power law with a high-energy cutoff. In addition, iron emission lines are detected in the pulsar spectrum at 6–7 keV. We show that the observed halo spectrum is considerably softer (a power-law index 2.8) than the pulsar spectrum (a power-law index 0.9), consistent with the predictions of theoretical models for the X-ray scattering by dust.

About the authors

A. E. Shtykovsky

Space Research Institute, Russian Academy of Sciences; National Research University ‘‘Higher School of Economics’

Email: a.shtykovsky@cosmos.ru
117997, Moscow, Russia; 101100, Moscow, Russia

A. A. Lutovinov

Space Research Institute, Russian Academy of Sciences

Email: a.shtykovsky@cosmos.ru
117997, Moscow, Russia

R. A. Krivonos

Space Research Institute, Russian Academy of Sciences

Email: a.shtykovsky@cosmos.ru
117997, Moscow, Russia

M. R. Gilfanov

Space Research Institute, Russian Academy of Sciences; Max Planck Institut für Astrophysik

Email: a.shtykovsky@cosmos.ru
117997, Moscow, Russia; Postfach 1317, D-85741, Garching, Germany

P. S. Medvedev

Space Research Institute, Russian Academy of Sciences

Email: a.shtykovsky@cosmos.ru
117997, Moscow, Russia

I. A. Mereminskiy

Space Research Institute, Russian Academy of Sciences

Email: a.shtykovsky@cosmos.ru
117997, Moscow, Russia

V. A. Arefiev

Space Research Institute, Russian Academy of Sciences

Email: a.shtykovsky@cosmos.ru
117997, Moscow, Russia

S. V. Molkov

Space Research Institute, Russian Academy of Sciences

Email: a.shtykovsky@cosmos.ru
117997, Moscow, Russia

R. A. Sunyaev

Space Research Institute, Russian Academy of Sciences

Author for correspondence.
Email: a.shtykovsky@cosmos.ru
117997, Moscow, Russia

References

  1. Арно (K.A. Arnaud), Astron. Soc. Pacific Conf. Ser. 101, 17 (1996).
  2. Афтаб и др. (N. Aftab, B. Paul, and P. Kretschmar), Astrophys. J. Suppl. Ser. 243, 29 (2019).
  3. Байлер-Джонс и др. (C.A.L. Bailer-Jones, J. Rybizki, M. Fouesneau, G. Mantelet, and R. Andrae), Astron. J. 156, 58 (2018).
  4. Бекер и др. (R.H. Becker, J.H. Swank, E.A. Boldt, S.S. Holt, S.H. Pravdo, J.R. Saba, and P.J. Serlemitsos), Astrophys. J. (Lett.) 216, L11 (1977).
  5. Брюннер и др. (H. Brunner, T. Liu, G. Lamer, A. Georgakakis, and A. Merloni, et al.), Astron. Astrophys. 661, A1 (2022).
  6. Дэвидсон (P.J.N. Davison), MNRAS. 179, 35 (1977).
  7. Валенчич, Смит (L.A. Valencic and R.K. Smith), Astrophys. J. 809, 66 (2015).
  8. Вернер и др. (D.A. Verner, G.J. Ferland, K.T. Korista, and D.G. Yakovlev), Astrophys. J. 465, 487 (1996).
  9. Вилмс и др. (J. Wilms, A. Allen, and R. McCray), Astrophys. J. 542, 914 (2000).
  10. Ву и др. (J.W. Woo, G.W. Clark, and F. Nagase), Am. Astron. Soc. Meet. Abstracts 180, 44 (1992).
  11. Группа HI4PI (HI4PI Collaboration and N. Ben Bekhti, L. Flöer, R. Keller, J. Kerp, D. Lenz, B. Winkel, J. Bailin, M.R. Calabretta, et al.), Astron. Astrophys. 594 (2016).
  12. Джаккони и др. (R. Giacconi, S. Murray, H. Gursky, E. Kellogg, E. Schreier, T. Matilsky, D. Koch, and H. Tananbaum), Astrophys. J. Suppl. Ser. 27, 37 (1974).
  13. Дрейн (B.T. Draine), Astrophys. J. 598, 1026 (2003).
  14. Иловайский и др. (S.A. Ilovaisky, C. Chevalier, and C. Motch), Astron. Astrophys. 71, L17 (1979).
  15. Кларк (G.W. Clark), Astrophys. J. 610, 956 (2004).
  16. Кларк и др. (G.W. Clark, J.W. Woo, F. Nagase, K. Makishima, and T. Sakao), Astrophys. J. 353, 274 (1990).
  17. Кларк и др. (G.W. Clark, J.W. Woo, and F. Nagase), Astrophys. J. 422, 336 (1994).
  18. Коминский, Мораес (L.R. Cominsky and F. Moraes), Astrophys. J. 370, 670 (1991).
  19. Кривонос и др. (R.A. Krivonos, J.A. Tomsick, F.E. Bauer, F.K. Baganoff, N.M. Barriere, et al.), Astrophys. J. 781, 107 (2014).
  20. Кэш (W. Cash), Astrophys. J. 228, 939 (1979).
  21. Малакария и др. (C. Malacaria, P. Jenke, O.J. Roberts, C.A. Wilson-Hodge, W.H. Cleveland, B. Mailyan, and GBM Accreting Pulsars Program Team), Astrophys. J. 896, 90 (2020).
  22. Мошэ, Горенштейн (C.W. Mauche and P. Gorenstein), Astrophys. J. 302, 371 (1986).
  23. Мэтис, Ли (J.S. Mathis and C.-W. Lee), Astrophys. J. 376, 490 (1991).
  24. Нагасе и др. (F. Nagase, T. Dotani, T. Endo, H. Ozawa, S. Uno, T. Kotani, and T. Mihara), Am. Inst. Phys. Conf. Ser. 599, 794 (2001).
  25. HEASARC (Nasa High Energy Astrophysics Science Archive Research Center), HEAsoft: Unified Release of FTOOLS and XANADU (2014).
  26. Овербек (J.W. Overbeck), Astrophys. J. 141, 864 (1965).
  27. Павлинский и др. (M. Pavlinsky, A. Tkachenko, V. Levin, N. Alexandrovich, V. Arefiev, V. Babyshkin, O. Batanov, Yu. Bodnar, et al.), Astron. Astrophys. 650, A42 (2021).
  28. Предель, Шмитт (P. Predehl and J.H.M.M. Schmitt), Astron. Astrophys. 293, 889 (1995).
  29. Предель и др. (P. Predehl, R. Andritschke, V. Arefiev, V. Babyshkin, O. Batanov, W. Becker, H. Böhringer, A. Bogomolov, et al.), Astron. Astrophys. 647, A1 (2021).
  30. Рейнольдс и др. (A.P. Reynolds, S.A. Bell, and R.W. Hilditch), MNRAS. 256, 631 (1992).
  31. Робба и др. (N.R. Robba, L. Burderi, T. Di Salvo, R. Iaria, and G. Cusumano), Astrophys. J. 562, 950 (2001).
  32. Родес-Рока и др. (J.J. Rodes-Roca, J.M. Torrejón, I. Kreykenbohm, S. Martínez Núñez, A. Camero-Arranz, and G. Bernabéu), Astron. Astrophys. 508, 395 (2009).
  33. Родес-Рока и др. (J.J. Rodes-Roca, K.L. Page, J.M. Torrejón, J.P. Osborne, and G. Bernabéu), Astron. Astrophys. 526, A64 (2011).
  34. Родес-Рока и др. (J.J. Rodes-Roca, J.M. Torrejón, S. Martínez-Nuñez, A. Giménez-García, and G. Bernabéu), Astronomische Nachrichten 225, 804 (2014).
  35. Смит, Двек (R.K. Smith and E. Dwek), Astrophys. J. 503, 831 (1998).
  36. Сюняев и др. (R. Sunyaev, V. Arefiev, V. Babyshkin, A. Bogomolov, K. Borisov, M. Buntov, H. Brunner, R. Burenin, et al.), Astron. Astrophys. 656, A132 (2021).
  37. Фаланга и др. (M. Falanga, E. Bozzo, A. Lutovinov, J.M. Bonnet-Bidaud, Y. Fetisova, and J. Puls), Astron. Astrophys. 809, 66 (2015).
  38. Фриман и др. (P. Freeman, St. Doe, and A. Siemiginowska), Proceedings of the SPIE 4477, 76 (2001).
  39. Фрусчоне и др. (A. Fruscione, J.C. McDowell, G.E. Allen, N.S. Brickhouse, D.J. Burke, et al.), Proceedings of the SPIE 6270 (2006).
  40. Хемпхилл и др. (P.B. Hemphill, R.E. Rothschild, F. Fürst, V. Grinberg, D. Klochkov, P. Kretschmar, et al.), Astrophys. J. 458, 2745 (2016).
  41. Хемпхилл и др. (P.B. Hemphill, R.E. Rothschild, D.M. Cheatham, F. Fürst, P. Kretschmar, et al.), Astrophys. J. 873, 62 (2019).

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