Discovery of ADC absorption in the LMXB XB 1323-69 with XMM-Newton

D Reed; Monika Balucinska-Church; AP Smale; T Dotani; Michael Church

doi:10.1016/j.asr.2006.02.019

Discovery of ADC absorption in the LMXB XB 1323-69 with XMM-Newton

D Reed, Monika Balucinska-Church, AP Smale, T Dotani, Michael Church

Physics and Astronomy

Research output: Contribution to journal › Article

Abstract

In our observation of the LMXB XB 1323-619 made with XMM-Newton in January 2003, a number of absorption lines were discovered, notably at 6.70 and 6.98 keV which we identify with scattering by high ionization state ions Fe XXV and Fe XXVI. Curve of growth analysis provided a consistent solution for collisional ionization for a plasma temperature k T = 31 keV, close to the electron temperature we previously obtained for the accretion disc corona (ADC) in this source. Thus, for the first time we can explain the absorption features found in recent years in dipping sources as originating in the ADC. We also find a remarkable linear increase in the rate of X-ray bursts with time implying that the gap between bursts will become zero on January 11 ( +/- 4), 2008. We expect the source to undergo a transition from X-ray bursting to X-ray flaring confirming that flaring is unstable nuclear burning. (C) 2006 COSPAR. Published by Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	1524-1528
Number of pages	5
Journal	Advances in Space Research
Volume	38
DOIs	https://doi.org/10.1016/j.asr.2006.02.019
Publication status	Published - 1 Jan 2006

Keywords

X-ray binaries
neutron stars
close binaries
XB 1323-619
accretion discs

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10.1016/j.asr.2006.02.019

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@article{13295a5473b2498585913fdccb60decb,

title = "Discovery of ADC absorption in the LMXB XB 1323-69 with XMM-Newton",

abstract = "In our observation of the LMXB XB 1323-619 made with XMM-Newton in January 2003, a number of absorption lines were discovered, notably at 6.70 and 6.98 keV which we identify with scattering by high ionization state ions Fe XXV and Fe XXVI. Curve of growth analysis provided a consistent solution for collisional ionization for a plasma temperature k T = 31 keV, close to the electron temperature we previously obtained for the accretion disc corona (ADC) in this source. Thus, for the first time we can explain the absorption features found in recent years in dipping sources as originating in the ADC. We also find a remarkable linear increase in the rate of X-ray bursts with time implying that the gap between bursts will become zero on January 11 ( +/- 4), 2008. We expect the source to undergo a transition from X-ray bursting to X-ray flaring confirming that flaring is unstable nuclear burning. (C) 2006 COSPAR. Published by Elsevier Ltd. All rights reserved.",

keywords = "X-ray binaries, neutron stars, close binaries, XB 1323-619, accretion discs",

author = "D Reed and Monika Balucinska-Church and AP Smale and T Dotani and Michael Church",

year = "2006",

month = jan,

day = "1",

doi = "10.1016/j.asr.2006.02.019",

language = "English",

volume = "38",

pages = "1524--1528",

journal = "Advances in Space Research",

publisher = "Elsevier",

}

TY - JOUR

T1 - Discovery of ADC absorption in the LMXB XB 1323-69 with XMM-Newton

AU - Reed, D

AU - Balucinska-Church, Monika

AU - Smale, AP

AU - Dotani, T

AU - Church, Michael

PY - 2006/1/1

Y1 - 2006/1/1

N2 - In our observation of the LMXB XB 1323-619 made with XMM-Newton in January 2003, a number of absorption lines were discovered, notably at 6.70 and 6.98 keV which we identify with scattering by high ionization state ions Fe XXV and Fe XXVI. Curve of growth analysis provided a consistent solution for collisional ionization for a plasma temperature k T = 31 keV, close to the electron temperature we previously obtained for the accretion disc corona (ADC) in this source. Thus, for the first time we can explain the absorption features found in recent years in dipping sources as originating in the ADC. We also find a remarkable linear increase in the rate of X-ray bursts with time implying that the gap between bursts will become zero on January 11 ( +/- 4), 2008. We expect the source to undergo a transition from X-ray bursting to X-ray flaring confirming that flaring is unstable nuclear burning. (C) 2006 COSPAR. Published by Elsevier Ltd. All rights reserved.

AB - In our observation of the LMXB XB 1323-619 made with XMM-Newton in January 2003, a number of absorption lines were discovered, notably at 6.70 and 6.98 keV which we identify with scattering by high ionization state ions Fe XXV and Fe XXVI. Curve of growth analysis provided a consistent solution for collisional ionization for a plasma temperature k T = 31 keV, close to the electron temperature we previously obtained for the accretion disc corona (ADC) in this source. Thus, for the first time we can explain the absorption features found in recent years in dipping sources as originating in the ADC. We also find a remarkable linear increase in the rate of X-ray bursts with time implying that the gap between bursts will become zero on January 11 ( +/- 4), 2008. We expect the source to undergo a transition from X-ray bursting to X-ray flaring confirming that flaring is unstable nuclear burning. (C) 2006 COSPAR. Published by Elsevier Ltd. All rights reserved.

KW - X-ray binaries

KW - neutron stars

KW - close binaries

KW - XB 1323-619

KW - accretion discs

U2 - 10.1016/j.asr.2006.02.019

DO - 10.1016/j.asr.2006.02.019

M3 - Article

VL - 38

SP - 1524

EP - 1528

JO - Advances in Space Research

JF - Advances in Space Research

ER -

Discovery of ADC absorption in the LMXB XB 1323-69 with XMM-Newton

Abstract

Keywords

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