Search for Gamma-Ray Emission from AE Aquarii with Seven Years of Fermi-LAT Observations

Journal
Date Issued
2016
Author(s)
Li, Jian
•
Torres, Diego F.
•
Rea, Nanda
•
de Oña Wilhelmi, Emma
•
•
Hou, Xian
•
Mauche, Christopher W.
DOI
Abstract
AE Aquarii (AE Aqr) is a cataclysmic binary hosting one of the fastest rotating ({P}{spin} = 33.08 s) white dwarfs (WDs) known. Based on seven years of Fermi Large Area Telescope (LAT) Pass 8 data, we report on a deep search for gamma-ray emission from AE Aqr. Using X-ray observations from ASCA, XMM-Newton, Chandra, Swift, Suzaku, and NuSTAR, spanning 20 years, we substantially extend and improve the spin ephemeris of AE Aqr. Using this ephemeris, we searched for gamma-ray pulsations at the spin period of the WD. No gamma-ray pulsations were detected above 3σ significance. Neither phase-averaged gamma-ray emission nor gamma-ray variability of AE Aqr is detected by Fermi LAT. We impose the most restrictive upper limit to the gamma-ray flux from AE Aqr to date: 1.3× {10}-12 erg cm-2 s-1 in the 100 MeV-300 GeV energy range, providing constraints on models.
Funding(s)
Volume
832
Issue
1
Start page
35
Uri
Url
Issn Identifier
0004-637X
Ads BibCode
2016ApJ...832...35L
Rights
open.access
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