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Title: CHANDRA, KECK, and VLA Observations of the Crab Nebula During the 2011-April Gamma-Ray Flare

Abstract

In this paper, we present results from our analysis of Chandra X-Ray Observatory, W. M. Keck Observatory, and Karl G. Jansky Very Large Array (VLA) images of the Crab Nebula that were contemporaneous with the γ-ray flare of 2011 April. Despite hints in the X-ray data, we find no evidence for statistically significant variations that pinpoint the specific location of the flares within the Nebula. The Keck observations extend this conclusion to the "inner knot," i.e., the feature within an arcsecond of the pulsar. The VLA observations support this conclusion. Lastly, we also discuss theoretical implications of the γ-ray flares and suggest that the most dramatic γ-ray flares are due to radiation-reaction-limited synchrotron emission associated with sudden, dissipative changes in the current system sustained by the central pulsar.

Authors:
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Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
Fermi-LAT Collaboration
OSTI Identifier:
1356596
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 765; Journal Issue: 1; Journal ID: ISSN 0004-637X
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; gamma rays: ISM; infrared: ISM; ISM: individual objects (Crab Nebula M1); magnetic reconnection; radio continuum: ISM; X-rays: individual (Crab Nebula M1)

Citation Formats

Weisskopf, Martin C., Tennant, Allyn F., Arons, Jonathan, Blandford, Roger, Buehler, Rolf, Caraveo, Patrizia, Cheung, Chi C., Costa, Enrico, de Luca, Andrea, Ferrigno, Carlo, Fu, Hai, Funk, Stefan, Habermehl, Moritz, Horns, Dieter, Linford, Justin D., Lobanov, Andrei, Max, Claire, Mignani, Roberto, O'Dell, Stephen L., Romani, Roger W., Striani, Edoardo, Tavani, Marco, Taylor, Gregory B., Uchiyama, Yasunobu, and Yuan, Yajie. CHANDRA, KECK, and VLA Observations of the Crab Nebula During the 2011-April Gamma-Ray Flare. United States: N. p., 2013. Web. doi:10.1088/0004-637X/765/1/56.
Weisskopf, Martin C., Tennant, Allyn F., Arons, Jonathan, Blandford, Roger, Buehler, Rolf, Caraveo, Patrizia, Cheung, Chi C., Costa, Enrico, de Luca, Andrea, Ferrigno, Carlo, Fu, Hai, Funk, Stefan, Habermehl, Moritz, Horns, Dieter, Linford, Justin D., Lobanov, Andrei, Max, Claire, Mignani, Roberto, O'Dell, Stephen L., Romani, Roger W., Striani, Edoardo, Tavani, Marco, Taylor, Gregory B., Uchiyama, Yasunobu, & Yuan, Yajie. CHANDRA, KECK, and VLA Observations of the Crab Nebula During the 2011-April Gamma-Ray Flare. United States. doi:10.1088/0004-637X/765/1/56.
Weisskopf, Martin C., Tennant, Allyn F., Arons, Jonathan, Blandford, Roger, Buehler, Rolf, Caraveo, Patrizia, Cheung, Chi C., Costa, Enrico, de Luca, Andrea, Ferrigno, Carlo, Fu, Hai, Funk, Stefan, Habermehl, Moritz, Horns, Dieter, Linford, Justin D., Lobanov, Andrei, Max, Claire, Mignani, Roberto, O'Dell, Stephen L., Romani, Roger W., Striani, Edoardo, Tavani, Marco, Taylor, Gregory B., Uchiyama, Yasunobu, and Yuan, Yajie. Fri . "CHANDRA, KECK, and VLA Observations of the Crab Nebula During the 2011-April Gamma-Ray Flare". United States. doi:10.1088/0004-637X/765/1/56. https://www.osti.gov/servlets/purl/1356596.
@article{osti_1356596,
title = {CHANDRA, KECK, and VLA Observations of the Crab Nebula During the 2011-April Gamma-Ray Flare},
author = {Weisskopf, Martin C. and Tennant, Allyn F. and Arons, Jonathan and Blandford, Roger and Buehler, Rolf and Caraveo, Patrizia and Cheung, Chi C. and Costa, Enrico and de Luca, Andrea and Ferrigno, Carlo and Fu, Hai and Funk, Stefan and Habermehl, Moritz and Horns, Dieter and Linford, Justin D. and Lobanov, Andrei and Max, Claire and Mignani, Roberto and O'Dell, Stephen L. and Romani, Roger W. and Striani, Edoardo and Tavani, Marco and Taylor, Gregory B. and Uchiyama, Yasunobu and Yuan, Yajie},
abstractNote = {In this paper, we present results from our analysis of Chandra X-Ray Observatory, W. M. Keck Observatory, and Karl G. Jansky Very Large Array (VLA) images of the Crab Nebula that were contemporaneous with the γ-ray flare of 2011 April. Despite hints in the X-ray data, we find no evidence for statistically significant variations that pinpoint the specific location of the flares within the Nebula. The Keck observations extend this conclusion to the "inner knot," i.e., the feature within an arcsecond of the pulsar. The VLA observations support this conclusion. Lastly, we also discuss theoretical implications of the γ-ray flares and suggest that the most dramatic γ-ray flares are due to radiation-reaction-limited synchrotron emission associated with sudden, dissipative changes in the current system sustained by the central pulsar.},
doi = {10.1088/0004-637X/765/1/56},
journal = {Astrophysical Journal},
number = 1,
volume = 765,
place = {United States},
year = {2013},
month = {2}
}

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