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http://hdl.handle.net/20.500.12386/24830
Titolo: | Search for Gamma-Ray Emission from AE Aquarii with Seven Years of Fermi-LAT Observations | Autori: | Li, Jian Torres, Diego F. Rea, Nanda de Oña Wilhelmi, Emma PAPITTO, ALESSANDRO Hou, Xian Mauche, Christopher W. |
Data pubblicazione: | 2016 | Rivista: | THE ASTROPHYSICAL JOURNAL | Numero: | 832 | Fascicolo: | 1 | Da pagina:: | 35 | Abstract: | AE Aquarii (AE Aqr) is a cataclysmic binary hosting one of the fastest rotating ({P}<SUB>{spin</SUB>} = 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}<SUP>-12</SUP> erg cm<SUP>-2</SUP> s<SUP>-1</SUP> in the 100 MeV-300 GeV energy range, providing constraints on models. | URI: | http://hdl.handle.net/20.500.12386/24830 | URL: | https://iopscience.iop.org/article/10.3847/0004-637X/832/1/35 https://arxiv.org/abs/1608.06662 |
ISSN: | 0004-637X | DOI: | 10.3847/0004-637X/832/1/35 | Bibcode ADS: | 2016ApJ...832...35L | Fulltext: | open |
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