The Crab Nebula flaring activity
نویسندگان
چکیده
منابع مشابه
Crab nebula of life.
Crabs—those sometimes pesky, hard-shelled beachcombers—are a highly diverse animal, with some 7,000 species found in oceans, lakes, and on land, varying in size from the diminutive pea crab (millimeters) to the giant 4-m wide Japanese spider crab. Tsang et al. (2014) have constructed the most complete and extensive data set to date. Their recalibrated crab gene tree using DNA and mitochondrial ...
متن کاملCOMPTEL -ray study of the Crab nebula
We report on a study of the -ray continuum emission from the Crab supernova nebula and on a search for nuclear de-excitation -ray lines. Crab is the brightest continuum source in the 1–10 MeV -ray sky, and its continuum radiation is most likely of synchrotron origin. It is a likely source of cosmic rays through shock acceleration and thus a potential candidate for -ray line emission from nuclea...
متن کاملObservations of the Crab nebula with HESS
Context. The Crab nebula was observed with the HESS stereoscopic Cherenkov-telescope array between October 2003 and January 2005 for a total of 22.9 h (after data quality selection). This period of time partly overlapped with the commissioning phase of the experiment; observations were made with three operational telescopes in late 2003 and with the complete 4 telescope array in January–Februar...
متن کاملray Halo around the Crab Nebula
Two Chandra observations have been used to search for thermal X-ray emission from within and around the Crab Nebula. Dead-time was minimized by excluding the brightest part of the Nebula from the field of view. A dust-scattered halo comprising 5% of the strength of the Crab is clearly detected with surface brightness measured out to a radial distance of 18 ′. Coverage is 100% at 4 ′ , 50% at 12...
متن کاملNonthermal Radiation of the Crab Nebula
The radiation mechanisms contributing to formation of the nonthermal spectrum of the Crab Nebula, as well as the information that could be derived from future observations in different energy bands, are discussed.
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2014
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2014.11.029