2022A&A...657A..58N


Query : 2022A&A...657A..58N

2022A&A...657A..58N - Astronomy and Astrophysics, volume 657A, 58-58 (2022/1-1)

Broad-band analysis of X-ray pulsar 2S 1845-024.

NABIZADEH A., TSYGANKOV S.S., MOLKOV S.V., KARASEV D.I., JI L., LUTOVINOV A.A. and POUTANEN J.

Abstract (from CDS):

We present the results of a detailed investigation of the poorly studied X-ray pulsar 2S 1845-024 based on data obtained at the NuSTAR observatory during the type I outburst in 2017. Neither pulse phase-averaged nor phase-resolved spectra of the source show evidence for a cyclotron absorption feature. We also used data obtained from other X-ray observatories (Swift, XMM-Newton and Chandra) to study the spectral properties as a function of orbital phase. The analysis reveals a high hydrogen column density for the source reaching ∼1024 cm–2 around periastron. Using high-quality Chandra data we were able to obtain an accurate localization of 2S 1845-024 at RA = 18:48:16.8 and Dec = -2:25:25.1 (J2000), which allowed us to use infrared (IR) data to roughly classify the optical counterpart of the source as an OB supergiant at a distance of ≥15 kpc.

Abstract Copyright: © ESO 2022

Journal keyword(s): accretion, accretion disks - magnetic fields - pulsars: individual: 2S 1845-024 - stars: neutron - X-rays: binaries

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 V* BP Cru HXB 12 26 37.5605188992 -62 46 13.261044684   12.70 10.66     B1.5Iaeq 657 0
2 4U 1850-03 HXB 18 48 17.7 -02 25 13           Be? 104 1
3 NAME Galactic Bulge reg ~ ~           ~ 4012 0
4 NAME Scutum Region reg ~ ~           ~ 31 0

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2023.01.31-01:56:50

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