NuSTAR and AstroSat observations of GX 9+1: spectral and temporal studies

Title

NuSTAR and AstroSat observations of GX 9+1: spectral and temporal studies

Creator

Thomas N.T.; Gudennavar S.B.; Bubbly S.G.

Description

We have studied the spectro-temporal properties of the neutron star low-mass X-ray binary GX 9+1 using data from NuSTAR/Focal Plane Module and AstroSat/Soft X-ray Telescope and Large Area X-ray Proportional Counter (LAXPC). The hardness-intensity diagram of the source showed it to be in the soft spectral state (banana branch) during both observations. NuSTAR spectral analysis yielded an inclination angle (?) = 29 and inner disc radius (Rin) ? 19 km. Assuming that the accretion disc was truncated at the AlfvCrossed D sign ?0.9) with a monotonic increase in mass accretion rate () along the banana branch. The analysis also showed the presence of absorption edges at ?1.9 and ?2.4 keV, likely due to Si xiii and S xv, respectively. Temporal analysis with LAXPC-20 data in the 0.02-100 Hz range revealed the presence of noise components, which could be characterized by broad Lorentzian components.

Source

Monthly Notices of the Royal Astronomical Society, Vol-525, No. 2, pp. 2355-2365.

Date

2023-01-01

Publisher

Oxford University Press

Subject

accretion, accretion discs; stars: neutron; X-rays: binaries; X-rays: individual: GX 9+1

Coverage

Thomas N.T., Department of Physics and Electronics, Christ University, Karnataka, Bangalore, 560029, India; Gudennavar S.B., Department of Physics and Electronics, Christ University, Karnataka, Bangalore, 560029, India; Bubbly S.G., Department of Physics and Electronics, Christ University, Karnataka, Bangalore, 560029, India

Rights

All Open Access; Green Open Access

Relation

ISSN: 358711; CODEN: MNRAA

Format

Online

Language

English

Type

Article

Identifier

https://doi.org/10.1093/mnras/stad2379

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