1998A&A...337..815P


Query : 1998A&A...337..815P

1998A&A...337..815P - Astronomy and Astrophysics, volume 337, 815-818 (1998/9-3)

Quasi-periodic oscillations discovered in the new X-ray pulsar XTE J1858+034.

PAUL B. and RAO A.R.

Abstract (from CDS):

We report the discovery of low frequency quasi-periodic oscillations centered at 0.11Hz in the newly discovered 221s X-ray pulsar XTE J1858+034. Among about 30 known transient X-ray pulsars this is the sixth source in which QPOs have been observed. If the QPOs are produced because of inhomogeneities in the accretion disk at the magnetospheric boundary, the low frequency of the QPOs indicate a large magnetosphere for this pulsar. Both the Keplerian frequency model and the beat frequency model are applicable for production of QPOs in this source. The QPOs and regular pulsations are found to be stronger at higher energy which favours the beat frequency model. The magnetic field of the pulsar is calculated as a function of its distance. The energy spectrum is found to be very hard, consisting of two components, a cut-off power law and an iron fluorescence line.

Abstract Copyright:

Journal keyword(s): X-rays: stars - pulsars: individual: XTE J1858+034

Simbad objects: 11

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Number of rows : 11
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 SK 160 HXB 01 17 05.1457288392 -73 26 36.014808156 12.23 13.00 13.15   13.17 O9.7Ia+ 821 0
2 V* V635 Cas HXB 01 18 31.9704955824 +63 44 33.072603144 17.05 16.64 15.19 14.34 13.22 B0.2Ve 688 0
3 V* BQ Cam HXB 03 34 59.9116110096 +53 10 23.296879776   17.16 15.42 14.26 13.04 O8.5Ve 425 1
4 V* X Per HXB 03 55 23.0777456088 +31 02 45.039836148 6.090 6.840 6.720     O9.5III 934 0
5 HD 245770 HXB 05 38 54.5748918624 +26 18 56.836952784 9.30 9.84 9.39 8.77 8.30 O9/B0III/Ve 920 0
6 V* V779 Cen HXB 11 21 15.0920532528 -60 37 25.630264596   14.4 12.27     O9III/Veq 1025 0
7 V* KZ TrA LXB 16 32 16.79 -67 27 39.3 17.40 18.60 18.5     ~ 547 1
8 3FHL J1746.2-2852 LXB 17 44 33.09 -28 44 27.0           ~ 511 0
9 XTE J1858+034 HXB 18 58 43 +03 26.3           ~ 71 0
10 4U 1907+09 HXB 19 09 37.1382681824 +09 49 55.279554289   19.41 16.35 14.40 12.53 O8.5Iab 321 1
11 V* V2246 Cyg HXB 20 32 15.2749858128 +37 38 14.843024844   22.16 19.41 17.32 15.18 B0Ve 398 0

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2022.05.27-14:04:41

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