首次探测到中子星高质量x射线双星

Q1 Earth and Planetary Sciences
J van den Eijnden, L Sidoli, M Díaz Trigo, N Degenaar, I El Mellah, F Fürst, V Grinberg, P Kretschmar, S Martínez-Núñez, J C A Miller-Jones, K Postnov, T D Russell
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引用次数: 0

摘要

从OB超巨星吸积的中子星通常分为持续吸积系统和瞬态吸积系统,称为超巨星x射线双星(SgXBs)和超巨星快速x射线瞬态(SFXTs)。吸积行为的这种二分法通常归因于大质量恒星风、双星轨道或磁场结构的系统差异,但这些假设的直接观测证据仍然很少。为了研究它们的恒星风,我们提出了用北方扩展毫米阵列对一个SFXT和一个SgXB进行100 ghz观测的结果。SFXT IGR J18410-0535在63.4±9.6 μJy处被检测到,而SgXB IGR J18410-0535未被检测到。对IGR J18410-0535的射电观测表明其低频频谱是平坦的或倒置的,这表明它是风发射而不是非热燃烧。然而,由于SFXT距离的不确定性,观测结果并不一定意味着SFXT和SgXB的风特性存在差异。我们将毫米约束与其他HMXB和孤立的OB超巨星进行比较,然后考虑未来的毫米运动如何通过包括x射线测量来约束HMXB的风特性。具体地说,我们讨论了注意事项和未来的步骤,以成功地测量风质量损失率和速度在hmxb协调毫米,无线电和x射线运动。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The first mm detection of a neutron star high-mass X-ray binary
ABSTRACT Neutron stars accreting from OB supergiants are often divided between persistently and transiently accreting systems, called supergiant X-ray binaries (SgXBs) and supergiant fast X-ray transients (SFXTs). This dichotomy in accretion behaviour is typically attributed to systematic differences in the massive stellar wind, binary orbit, or magnetic field configuration, but direct observational evidence for these hypotheses remains sparse. To investigate their stellar winds, we present the results of pilot 100-GHz observations of one SFXT and one SgXB with the Northern Extended Millimetre Array. The SFXT, IGR J18410-0535, is detected as a point source at 63.4 ± 9.6 μJy, while the SgXB, IGR J18410-0535 remains undetected. Radio observations of IGR J18410-0535 imply a flat or inverted low-frequency spectrum, arguing for wind emission and against non-thermal flaring. Due to the uncertain SFXT distance, however, the observations do not necessarily imply a difference between the wind properties of the SFXT and SgXB. We compare the mm constraints with other HMXBs and isolated OB supergiants, before considering how future mm campaigns can constrain HMXB wind properties by including X-ray measurements. Specifically, we discuss caveats and future steps to successfully measure wind mass-loss rates and velocities in HMXBs with coordinated mm, radio, and X-ray campaigns.
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来源期刊
Monthly Notices of the Royal Astronomical Society: Letters
Monthly Notices of the Royal Astronomical Society: Letters Earth and Planetary Sciences-Space and Planetary Science
CiteScore
8.80
自引率
0.00%
发文量
136
期刊介绍: For papers that merit urgent publication, MNRAS Letters, the online section of Monthly Notices of the Royal Astronomical Society, publishes short, topical and significant research in all fields of astronomy. Letters should be self-contained and describe the results of an original study whose rapid publication might be expected to have a significant influence on the subsequent development of research in the associated subject area. The 5-page limit must be respected. Authors are required to state their reasons for seeking publication in the form of a Letter when submitting their manuscript.
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