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Firm detection of 7-year X-ray periodicity from X Persei

  • Motoki Nakajima (a1), Hitoshi Negoro (a2), Tatehiro Mihara (a3), Mutsumi Sugizaki (a3) (a4), Fumiaki Yatabe (a3) and Kazuo Makishima (a3)...

Abstract

We report on the detection of long-term X-ray periodicity from the Be/X-ray binary pulsar X Persei. Based on over 23 years of X-ray data observed using RXTE/ASM, Swift/BAT and MAXI/GSC, we confirmed that X Persei exhibits quasi-periodic X-ray flares with a period of ∼7 years. The recurrence timescale corresponds to approximately 10 times its binary orbital period of 250 days. Spectral and hardness ratio changes were not detected along with long-term periodic activity. If we interpret the observed 7 year periodicity of X-ray band flux as a superorbital modulation, then this would be the first observation among the Be/X-ray binaries.

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Corbet, R. H., & Krimm, H. A. 2013, ApJ, 778, 45
Delgado-Marti, H., Levine, A. L., Pfahl, E., & Rappaport, S. A. 2001, ApJ, 546, 455
Kotze, M. M., & Charles, P. A. 2012, MNRAS, 420, 1575
Laplace, E., Mihara, T., Moritani, Y., Nakajima, M., Takagi, T., Makishima, K., & Santangelo, A. 2017, A&A, 597, 124
Lutovinov, A., Tsygankov, S., & Chernyakova, M. 2012, MNRAS, 423, 1978
Lyubimkov, L. S., Rostopchin, S. I., Roche, P., & Tarasov, A. E. 1997, MNRAS, 286, 549
Maitra, C., Raichur, H., Paradhan, P., & Paul, B. 2017, MNRAS, 470, 713
Reig, P. 2011, Ap&SS, 332, 1
Reig, P., Nersesian, A., Zezas, A., Gkouvelis, L., & Coe, M. J. 2016, A&A, 590, 122
Roche, P., Coe, M. J., Fabregat, J., McHardy, I. M., Norton, A. J., Percy, J. R., Reglero, V., Reynolds, A., & Unger, S. J. 1993, A&A, 270, 122
White, N. E., Mason, K. O., Sanford, P. W., Murdin, P. 1976, MNRAS, 176, 201
Yan, J., Li, H., & Liu, Q. 2012, ApJ, 744, 37
Yatabe, F., Makishima, K., Mihara, T., Nakajima, M., Sugizaki, M., Kitamoto, S., Yoshida, Y., & Takagi, T. 2018, PASJ, 99Y
Zamanov, R., Stoyanov, K. A., Wolter, U., Marchev, D. 2018, arXiv:1811.09162
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Firm detection of 7-year X-ray periodicity from X Persei

  • Motoki Nakajima (a1), Hitoshi Negoro (a2), Tatehiro Mihara (a3), Mutsumi Sugizaki (a3) (a4), Fumiaki Yatabe (a3) and Kazuo Makishima (a3)...

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