SRG/ART-XC discovery of SRGA J204318.2+443815: towards the complete population of faint X-ray pulsars
A. A. Lutovinov, S. S. Tsygankov, I. A. Mereminskiy, S. V. Molkov, A. N. Semena, V. A. Arefiev, I. F. Bikmaev, A. A. Djupvik, M. R. Gilfanov, D. I. Karasev, I. … 展开作者
A. A. Lutovinov, S. S. Tsygankov, I. A. Mereminskiy, S. V. Molkov, A. N. Semena, V. A. Arefiev, I. F. Bikmaev, A. A. Djupvik, M. R. Gilfanov, D. I. Karasev, I. Yu. Lapshov, P. S. Medvedev, A. E. Shtykovsky, R. A. Sunyaev, A. Yu. Tkachenko, S. Anand, M. C. B. Ashley, K. De, M. M. Kasliwal, S. R. Kulkarni, J. van Roestel, Y. Yao
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Submitted to A&A for the Special Issue: The Early Data Release of eROSITA and Mikhail Pavlinsky ART-XC on the SRG Mission. 9 pages, 9 figures
We report a discovery of a new long-period X-ray pulsar SRGA J204318.2+443815/SRGe J204319.0+443820 in the Be binary system. The source was found in the second all-sky survey by the Mikhail Pavlinsky telescope on board the SRG mission. The follow-up observations with XMM-Newton, NICER and NuSTAR observatories allowed us to discover a strong coherent signal in the source light curve with the period of $\sim742$ s. The pulsed fraction was found to depend on the energy increasing from $\sim20$% in soft X-rays to $>50$% at high energies, as it is typical for X-ray pulsars. The source demonstrate a quite hard spectrum with an exponential cutoff at high energies and bolometric luminosity of $L_X \simeq 4\times10^{35}$ erg/s. Dedicated optical and infrared observations with the RTT-150, NOT, Keck and Palomar telescopes revealed a number of emission lines (H$_α$, HeI, Pashen and Braket series) with the strongly absorbed continuum. All of above suggests that SRGAJ204318.2+443815/ SRGeJ204319.0+443820 is a new persistent low luminosity X-ray pulsar in a distant binary system with a Be-star of the B0-B2e class. Thus the SRG observatory allow us to unveil the hidden population of faint persistent objects including the population of slowly rotating X-ray pulsars in Be systems.
Constraining neutron-star properties with ensembles of thermonuclear bursts: application to SRGA J144459.2-604207
Monash University（莫纳什大学）；Institute for Globally-Distributed Research and Education (IGDORE)（全球分布式研究与教育学院）；International Centre for Radio Astronomy Research, Curtin University（科廷大学国际射电天文研究中心）；Xiangtan University（湘潭大学）；Qingdao University of Technology（青岛理工大学）
Pulse profile modelling of the 2024 outburst of the accreting millisecond pulsar SRGA J144459.2-604207
Anton Pannekoek Institute for Astronomy, University of Amsterdam（阿姆斯特丹大学安顿·潘内科克天文学研究所）；University of Helsinki（赫尔辛基大学）；Gravitation and Astroparticle Physics Amsterdam (GRAPPA), University of Amsterdam（阿姆斯特丹引力与高能物理研究所（GRAPPA））；McGill University（麦吉尔大学）；Trottier Space Institute, McGill University（麦吉尔大学特罗蒂尔太空研究所）；University of Turku（图尔库大学）；INAF Istituto di Astrofisica e Planetologia Spaziali（意大利国家天体物理学研究所）；Monash University（蒙纳士大学）；Institute for Globally Distributed Open Research and Education (IGDORE)（全球分布式开放研究与教育研究所）；University of Toulouse（图卢兹大学）；Università degli Studi di Roma “Tor Vergata”（罗马托维加塔大学）；Newcastle University（纽卡斯尔大学）；INAF Osservatorio Astronomico di Roma（意大利国家天体物理学研究所罗马天文台）；Nanjing University（南京大学）；Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education（教育部现代天体学与天体物理学重点实验室（南京大学））
The SRG/eROSITA all-sky survey: Hard X-ray selected Active Galactic Nuclei
Max-Planck-Institut für extraterrestrische Physik（马克斯·普朗克地外物理研究所）；Department of Astronomy, University of Geneva（日内瓦大学天文学系）；Exzellenzcluster ORIGINS（ORIGINS卓越集群）；Max-Planck Institut für Astronomie（马克斯·普朗克天体物理学研究所）
The average X-ray spectrum of the volume-complete M-, F-, G-, and K-type star sample within 10 pc of the Sun
Max-Planck-Institut für extraterrestrische Physik（马克斯·普朗克地外物理研究所）；INAF-Osservatorio Astronomico di Brera（意大利国家天体物理研究所布雷拉天文台）；Como Lake centre for AstroPhysics (CLAP), DiSAT, Università dell’Insubria（因苏布里亚大学迪萨特学院科莫湖天体物理中心）；Institut für Astronomie und Astrophysik, Eberhard Karls Universität Tübingen（蒂宾根大学天文与天体物理研究所）；Dr. Karl Remeis Observatory（卡尔·雷梅斯博士天文台）
