New observations of the cyclotron absorption feature in Hercules X-1
The Ginga satellite observatory has been used to measure a cyclotron feature in the hard X-ray spectrum of the 1.24-s binary pulsar Hercules X-1 with a much greater energy resolution than in previous observations. The spectrum from 10-60 keV can be described with a simple analytical formula which in...
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| Veröffentlicht in: | Nature (London) 1990-07, Vol.346 (6281), p.250-252 |
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| creator | Mihara, T. Makishima, K. Ohashi, T. Sakao, T. Tashiro, M. |
| description | The Ginga satellite observatory has been used to measure a cyclotron feature in the hard X-ray spectrum of the 1.24-s binary pulsar Hercules X-1 with a much greater energy resolution than in previous observations. The spectrum from 10-60 keV can be described with a simple analytical formula which indicates an absorption feature at about 34 keV rather than an emission feature at about 50 keV. From this, the surface magnetic field strength of Her X-1 is estimated to be (2.9 + or - 0.3) x 10 to the 12th G. |
| doi_str_mv | 10.1038/346250a0 |
| format | Article |
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The spectrum from 10-60 keV can be described with a simple analytical formula which indicates an absorption feature at about 34 keV rather than an emission feature at about 50 keV. 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The spectrum from 10-60 keV can be described with a simple analytical formula which indicates an absorption feature at about 34 keV rather than an emission feature at about 50 keV. From this, the surface magnetic field strength of Her X-1 is estimated to be (2.9 + or - 0.3) x 10 to the 12th G.</description><subject>Absorption</subject><subject>Astronomy</subject><subject>Astrophysics</subject><subject>Cyclotron resonance</subject><subject>Earth, ocean, space</subject><subject>Energy</subject><subject>Energy measurement</subject><subject>Energy resolution</subject><subject>Exact sciences and technology</subject><subject>Field strength</subject><subject>Humanities and Social Sciences</subject><subject>Late stages of stellar evolution (including black holes)</subject><subject>letter</subject><subject>Magnetic fields</subject><subject>multidisciplinary</subject><subject>Neutron stars</subject><subject>Pulsars</subject><subject>Satellite observation</subject><subject>Science</subject><subject>Science (multidisciplinary)</subject><subject>Stars</subject><subject>X-ray 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(London)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Mihara, T.</au><au>Makishima, K.</au><au>Ohashi, T.</au><au>Sakao, T.</au><au>Tashiro, M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>New observations of the cyclotron absorption feature in Hercules X-1</atitle><jtitle>Nature (London)</jtitle><stitle>Nature</stitle><date>1990-07-19</date><risdate>1990</risdate><volume>346</volume><issue>6281</issue><spage>250</spage><epage>252</epage><pages>250-252</pages><issn>0028-0836</issn><eissn>1476-4687</eissn><coden>NATUAS</coden><abstract>The Ginga satellite observatory has been used to measure a cyclotron feature in the hard X-ray spectrum of the 1.24-s binary pulsar Hercules X-1 with a much greater energy resolution than in previous observations. The spectrum from 10-60 keV can be described with a simple analytical formula which indicates an absorption feature at about 34 keV rather than an emission feature at about 50 keV. From this, the surface magnetic field strength of Her X-1 is estimated to be (2.9 + or - 0.3) x 10 to the 12th G.</abstract><cop>Legacy CDMS</cop><pub>Nature Publishing Group UK</pub><doi>10.1038/346250a0</doi><tpages>3</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0028-0836 |
| ispartof | Nature (London), 1990-07, Vol.346 (6281), p.250-252 |
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| source | Nature; NASA Technical Reports Server; SpringerLink Journals - AutoHoldings |
| subjects | Absorption Astronomy Astrophysics Cyclotron resonance Earth, ocean, space Energy Energy measurement Energy resolution Exact sciences and technology Field strength Humanities and Social Sciences Late stages of stellar evolution (including black holes) letter Magnetic fields multidisciplinary Neutron stars Pulsars Satellite observation Science Science (multidisciplinary) Stars X-ray spectra |
| title | New observations of the cyclotron absorption feature in Hercules X-1 |
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