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# Search for gamma-ray emission from AE Aquarii with seven years of FERMI-LAT observations

Li, Jian and Torres, Diego F. and Rea, Nanda and de Ona Wilhelmi, Emma and Papitto, Alessandro and Hou, Xian and Mauche, Christopher W. (2016) Search for gamma-ray emission from AE Aquarii with seven years of FERMI-LAT observations. . https://resolver.caltech.edu/CaltechAUTHORS:20160825-141503638

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## Abstract

AE Aquarii (AE Aqr) is a cataclysmic binary hosting one of the fastest rotating (P$_{\rm spin}$ = 33.08 s) white dwarfs 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 white dwarf. No gamma-ray pulsations were detected above 3 $\sigma$ significance. Neither phase-averaged gamma-ray emission nor gamma-ray variability of AE Aquarii is detected by Fermi-LAT. We impose the most restrictive upper limit to the gamma-ray flux from AE Aqr to date: 1.3 x 10^{-12} erg cm^{-2} s^{-1} in the 100 MeV-300 GeV energy range, providing constraints on models.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription
http://arxiv.org/abs/1608.06662arXivDiscussion Paper
ORCID:
AuthorORCID
Li, Jian0000-0003-0297-6528
Torres, Diego F.0000-0002-1522-9065
Rea, Nanda0000-0003-2177-6388
Hou, Xian0000-0003-0933-6101
Additional Information:We acknowledge the support from the grants AYA2015-71042-P, SGR 2014-1073 and the National Natural Science Foundation of China via NSFC-11473027, NSFC-11503078, NSFC-11133002, NSFC-11103020, XTP project XDA 04060604 and the Strategic Priority Research Program “The Emergence of Cosmological Structures” of the Chinese Academy of Sciences, Grant No. XDB09000000. N.R. is further supported by an NWO Vidi Award. A.P. acknowledges support via an EU Marie Sklodowska-Curie Individual Fellowship under contract No. 660657-TMSPH2020-MSCA-IF-2014, as well as fruitful discussion with the international team on “The disk-magnetosphere interaction around transitional millisecond pulsars” at ISSI (International Space Science Institute), Bern. C.W.M.’s contribution to this work was performed under the auspices of the US Department of Energy by Lawrence Livermore National Laboratory under Contract DEAC52-07NA27344. We acknowledge the assistance from Dr. Zhongli Zhang with the Suzaku data analysis. This research has made use of data obtained through the High Energy Astrophysics Science Archive Research Center Online Service, provided by the NASA/Goddard Space Flight Center.
Group:NuSTAR
Record Number:CaltechAUTHORS:20160825-141503638
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20160825-141503638
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:69949
Collection:CaltechAUTHORS
Deposited By: Joy Painter
Deposited On:26 Aug 2016 15:22
Last Modified:09 Mar 2020 13:19

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