Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic On-line Article (HTML)
· Table of Contents
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Timing analysis and spin evolution of accreting millisecond X-ray pulsars: the strange case of XTE J1807-294
Authors:
Riggio, A.; Burderi, L.; di Salvo, T.; Menna, M. T.; Papitto, A.
Affiliation:
AA(Dip. di Fisica, Univ. degli Studi di Cagliari, Cittadella Universitaria, S.P. Monserrato-Sestu Km 0,700 09042, Monserrato (CA), Italy), AB(Dip. di Fisica, Univ. degli Studi di Cagliari, Cittadella Universitaria, S.P. Monserrato-Sestu Km 0,700 09042, Monserrato (CA), Italy), AC(Dip. di Scienze Fisiche e Astronomiche, Univ. di Palermo, Via Archirafi 36, Palermo I-90123, Italy), AD(INAF OAR, Via Frascati 33, Rome I-00040, Italy), AE(Dip. di Fisica, Univ. di Roma ``Tor Vergata,'' via della Ricerca Scientifica 1, 00133 Roma, Italy; INAF OAR, Via Frascati 33, Rome I-00040, Italy)
Publication:
A DECADE OF ACCRETING MILLISECOND X-RAY PULSARS. AIP Conference Proceedings, Volume 1068, pp. 43-46 (2008). (AIPC Homepage)
Publication Date:
10/2008
Origin:
AIP
PACS Keywords:
Accretion and accretion disks, Pulsars, Neutron stars
DOI:
10.1063/1.3031203
Bibliographic Code:
2008AIPC.1068...43R

Abstract

The detailed timing analysis of the accreting X-ray millisecond pulsar XTE J1807-294 during the 2003 outburst observed by RXTE, will be summed up here. A timing technique was developed in order to obtain the complete set of orbital parameters. The phase delays derived from the pulse profile show a strong erratic behavior superposed to what appears as a global spin-up trend. The erratic behavior of the pulse phase delays is strongly anti-correlated to rapid variations of the flux. A separate analysis of the phase delays of the first and second harmonic of the spin frequency shows that the latter are far less affected by the erratic behavior. In the hypothesis that the second harmonic pulse phase delays are a good tracer of the spin frequency evolution, we derive a precise estimate of the spin frequency and its derivative.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints