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No Persistent Pulsations in Aquila X-1 as it Fades into Quiescence

Chandler, A. M. and Rutledge, R. E. (2000) No Persistent Pulsations in Aquila X-1 as it Fades into Quiescence. Astrophysical Journal, 545 (2). pp. 1000-1006. ISSN 0004-637X. https://resolver.caltech.edu/CaltechAUTHORS:20150219-091844639

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Abstract

We searched for coherent X-ray pulsations from Aql X-1 in a series of RXTE observations taken shortly after a recent outburst. During the course of these observations, Aql X-1 passes through an apparent "propeller" phase as its luminosity fades to its quiescent value. No pulsations were detected, and we place upper limits (ranging from 0.52% to 9.0%) on the fractional rms amplitude of any periodic signal contained in the various data sets searched. This result has implications for the geometry of the system, if the quiescent luminosity is due to continued low-level accretion. Alternatively, our result supports the idea that the quiescent luminosity may be due to thermal emission.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1086/317831DOIArticle
http://iopscience.iop.org/0004-637X/545/2/1000PublisherArticle
http://adsabs.harvard.edu/abs/2000ApJ...545.1000CADSArticle
Additional Information:© 2000. The American Astronomical Society. We thank Stuart B. Anderson and Thomas A. Prince for helpful discussions. We also thank Lars Bildsten, Sergio Campana, and an anonymous referee for valuable comments on the manuscript. This work was supported by NASA grant NAG 5-3239.
Group:Space Radiation Laboratory
Funders:
Funding AgencyGrant Number
NASANAG5-3239
Subject Keywords:stars: individual (Aquila X-1); stars: neutron; X-rays: stars
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory2000-08
Issue or Number:2
Record Number:CaltechAUTHORS:20150219-091844639
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150219-091844639
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:54995
Collection:CaltechAUTHORS
Deposited By: Deborah Miles
Deposited On:24 Feb 2015 03:32
Last Modified:03 Oct 2019 08:02

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