The eclipsing millisecond pulsar PSR 1957+20
Information obtained over the past year on the eclipsing millisecond pulsar PSR 1957 + 20 and its orbiting companion is discussed. The pulsar is found to be similar in many ways to other millisecond pulsars: its spin parameters are extremely stable, its period derivative is very small, its profile h...
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| Veröffentlicht in: | The Astrophysical journal 1990-03, Vol.351 (2), p.642-650 |
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| container_title | The Astrophysical journal |
| container_volume | 351 |
| creator | FRUCHTER, A. S BERMAN, G TAYLOR, J. H THORSETT, S. E WEISBERG, J. M BOWER, G CONVERY, M GOSS, W. M HANKINS, T. H KLEIN, J. R NICE, D. J RYBA, M. F STINEBRING, D. R |
| description | Information obtained over the past year on the eclipsing millisecond pulsar PSR 1957 + 20 and its orbiting companion is discussed. The pulsar is found to be similar in many ways to other millisecond pulsars: its spin parameters are extremely stable, its period derivative is very small, its profile has a strong interpulse, and its radio spectrum has a steep power-law index. The orbit is nearly circular, and the mass function implies a companion mass not much greater than 0.022 solar. Eclipses last for approximately 56 and 50 min at 318 and 430 MHz, respectively, corresponding to a nu exp - 0.41 + or - 0.09 dependence of eclipse duration on frequency. The available evidence points strongly toward a system in which the radiation from the pulsar heats the companion to the point of ablation, thereby driving a stellar wind that trails outward and behind the companion. 28 refs. |
| doi_str_mv | 10.1086/168502 |
| format | Article |
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S ; BERMAN, G ; TAYLOR, J. H ; THORSETT, S. E ; WEISBERG, J. M ; BOWER, G ; CONVERY, M ; GOSS, W. M ; HANKINS, T. H ; KLEIN, J. R ; NICE, D. J ; RYBA, M. F ; STINEBRING, D. R</creator><creatorcontrib>FRUCHTER, A. S ; BERMAN, G ; TAYLOR, J. H ; THORSETT, S. E ; WEISBERG, J. M ; BOWER, G ; CONVERY, M ; GOSS, W. M ; HANKINS, T. H ; KLEIN, J. R ; NICE, D. J ; RYBA, M. F ; STINEBRING, D. R</creatorcontrib><description>Information obtained over the past year on the eclipsing millisecond pulsar PSR 1957 + 20 and its orbiting companion is discussed. The pulsar is found to be similar in many ways to other millisecond pulsars: its spin parameters are extremely stable, its period derivative is very small, its profile has a strong interpulse, and its radio spectrum has a steep power-law index. The orbit is nearly circular, and the mass function implies a companion mass not much greater than 0.022 solar. Eclipses last for approximately 56 and 50 min at 318 and 430 MHz, respectively, corresponding to a nu exp - 0.41 + or - 0.09 dependence of eclipse duration on frequency. 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S</creatorcontrib><creatorcontrib>BERMAN, G</creatorcontrib><creatorcontrib>TAYLOR, J. H</creatorcontrib><creatorcontrib>THORSETT, S. E</creatorcontrib><creatorcontrib>WEISBERG, J. M</creatorcontrib><creatorcontrib>BOWER, G</creatorcontrib><creatorcontrib>CONVERY, M</creatorcontrib><creatorcontrib>GOSS, W. M</creatorcontrib><creatorcontrib>HANKINS, T. H</creatorcontrib><creatorcontrib>KLEIN, J. R</creatorcontrib><creatorcontrib>NICE, D. J</creatorcontrib><creatorcontrib>RYBA, M. F</creatorcontrib><creatorcontrib>STINEBRING, D. R</creatorcontrib><title>The eclipsing millisecond pulsar PSR 1957+20</title><title>The Astrophysical journal</title><description>Information obtained over the past year on the eclipsing millisecond pulsar PSR 1957 + 20 and its orbiting companion is discussed. The pulsar is found to be similar in many ways to other millisecond pulsars: its spin parameters are extremely stable, its period derivative is very small, its profile has a strong interpulse, and its radio spectrum has a steep power-law index. The orbit is nearly circular, and the mass function implies a companion mass not much greater than 0.022 solar. Eclipses last for approximately 56 and 50 min at 318 and 430 MHz, respectively, corresponding to a nu exp - 0.41 + or - 0.09 dependence of eclipse duration on frequency. The available evidence points strongly toward a system in which the radiation from the pulsar heats the companion to the point of ablation, thereby driving a stellar wind that trails outward and behind the companion. 28 refs.</description><subject>Astronomy</subject><subject>BINARY STARS</subject><subject>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</subject><subject>COSMIC RADIO SOURCES</subject><subject>Earth, ocean, space</subject><subject>ECLIPSE</subject><subject>ELECTROMAGNETIC RADIATION</subject><subject>Exact sciences and technology</subject><subject>HEATING</subject><subject>Late stages of stellar evolution (including black holes)</subject><subject>MAGNETIC FIELDS</subject><subject>MASS</subject><subject>MOTION</subject><subject>Neutron stars</subject><subject>ORBITS</subject><subject>POLARIZATION</subject><subject>PULSARS</subject><subject>RADIATIONS</subject><subject>RADIOWAVE RADIATION</subject><subject>ROTATION</subject><subject>STARS</subject><subject>STELLAR ACTIVITY 640102 -- Astrophysics & Cosmology-- Stars & Quasi-Stellar, Radio & X-Ray Sources</subject><subject>STELLAR RADIATION</subject><subject>STELLAR WINDS</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1990</creationdate><recordtype>article</recordtype><recordid>eNo90E1LxDAQBuAgCtZVf0MR8aLVTL4mPcriFywouoK3kqZTN9LtlqYe_Pe2VDwNAw8vMy9jp8CvgVtzA8ZqLvZYAlraTEmN-yzhnKvMSPw4ZEcxfk2ryPOEXa03lJJvQhdD-5luQ9OESH7XVmn33UTXpy9vrynkGi8FP2YHtWsinfzNBXu_v1svH7PV88PT8naVeYE4ZEJjLmyJ2qhSGEQtyWEtS1JSAgHkoDQJoQEqh0pXiLWzRgDmqiQEkgt2Nufu4hCK6MNAfjPe1JIfivG7SY7oYka-38XYU110fdi6_qcAXkxFFHMRIzyfYeeid03du9aH-K-NVdIII38BOkNXng</recordid><startdate>19900310</startdate><enddate>19900310</enddate><creator>FRUCHTER, A. S</creator><creator>BERMAN, G</creator><creator>TAYLOR, J. H</creator><creator>THORSETT, S. E</creator><creator>WEISBERG, J. M</creator><creator>BOWER, G</creator><creator>CONVERY, M</creator><creator>GOSS, W. M</creator><creator>HANKINS, T. H</creator><creator>KLEIN, J. R</creator><creator>NICE, D. J</creator><creator>RYBA, M. F</creator><creator>STINEBRING, D. R</creator><general>University of Chicago Press</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope></search><sort><creationdate>19900310</creationdate><title>The eclipsing millisecond pulsar PSR 1957+20</title><author>FRUCHTER, A. S ; BERMAN, G ; TAYLOR, J. H ; THORSETT, S. E ; WEISBERG, J. M ; BOWER, G ; CONVERY, M ; GOSS, W. M ; HANKINS, T. H ; KLEIN, J. R ; NICE, D. J ; RYBA, M. F ; STINEBRING, D. R</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c277t-257928b7564b267753ea7f3be4331e119145e22511da745d77fa8621794be71e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1990</creationdate><topic>Astronomy</topic><topic>BINARY STARS</topic><topic>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</topic><topic>COSMIC RADIO SOURCES</topic><topic>Earth, ocean, space</topic><topic>ECLIPSE</topic><topic>ELECTROMAGNETIC RADIATION</topic><topic>Exact sciences and technology</topic><topic>HEATING</topic><topic>Late stages of stellar evolution (including black holes)</topic><topic>MAGNETIC FIELDS</topic><topic>MASS</topic><topic>MOTION</topic><topic>Neutron stars</topic><topic>ORBITS</topic><topic>POLARIZATION</topic><topic>PULSARS</topic><topic>RADIATIONS</topic><topic>RADIOWAVE RADIATION</topic><topic>ROTATION</topic><topic>STARS</topic><topic>STELLAR ACTIVITY 640102 -- Astrophysics & Cosmology-- Stars & Quasi-Stellar, Radio & X-Ray Sources</topic><topic>STELLAR RADIATION</topic><topic>STELLAR WINDS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>FRUCHTER, A. S</creatorcontrib><creatorcontrib>BERMAN, G</creatorcontrib><creatorcontrib>TAYLOR, J. H</creatorcontrib><creatorcontrib>THORSETT, S. E</creatorcontrib><creatorcontrib>WEISBERG, J. M</creatorcontrib><creatorcontrib>BOWER, G</creatorcontrib><creatorcontrib>CONVERY, M</creatorcontrib><creatorcontrib>GOSS, W. M</creatorcontrib><creatorcontrib>HANKINS, T. H</creatorcontrib><creatorcontrib>KLEIN, J. R</creatorcontrib><creatorcontrib>NICE, D. J</creatorcontrib><creatorcontrib>RYBA, M. F</creatorcontrib><creatorcontrib>STINEBRING, D. R</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>FRUCHTER, A. S</au><au>BERMAN, G</au><au>TAYLOR, J. H</au><au>THORSETT, S. E</au><au>WEISBERG, J. M</au><au>BOWER, G</au><au>CONVERY, M</au><au>GOSS, W. M</au><au>HANKINS, T. H</au><au>KLEIN, J. R</au><au>NICE, D. J</au><au>RYBA, M. F</au><au>STINEBRING, D. R</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The eclipsing millisecond pulsar PSR 1957+20</atitle><jtitle>The Astrophysical journal</jtitle><date>1990-03-10</date><risdate>1990</risdate><volume>351</volume><issue>2</issue><spage>642</spage><epage>650</epage><pages>642-650</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><coden>ASJOAB</coden><abstract>Information obtained over the past year on the eclipsing millisecond pulsar PSR 1957 + 20 and its orbiting companion is discussed. The pulsar is found to be similar in many ways to other millisecond pulsars: its spin parameters are extremely stable, its period derivative is very small, its profile has a strong interpulse, and its radio spectrum has a steep power-law index. The orbit is nearly circular, and the mass function implies a companion mass not much greater than 0.022 solar. Eclipses last for approximately 56 and 50 min at 318 and 430 MHz, respectively, corresponding to a nu exp - 0.41 + or - 0.09 dependence of eclipse duration on frequency. The available evidence points strongly toward a system in which the radiation from the pulsar heats the companion to the point of ablation, thereby driving a stellar wind that trails outward and behind the companion. 28 refs.</abstract><cop>Chicago, IL</cop><pub>University of Chicago Press</pub><doi>10.1086/168502</doi><tpages>9</tpages></addata></record> |
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| ispartof | The Astrophysical journal, 1990-03, Vol.351 (2), p.642-650 |
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| source | Alma/SFX Local Collection |
| subjects | Astronomy BINARY STARS CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS COSMIC RADIO SOURCES Earth, ocean, space ECLIPSE ELECTROMAGNETIC RADIATION Exact sciences and technology HEATING Late stages of stellar evolution (including black holes) MAGNETIC FIELDS MASS MOTION Neutron stars ORBITS POLARIZATION PULSARS RADIATIONS RADIOWAVE RADIATION ROTATION STARS STELLAR ACTIVITY 640102 -- Astrophysics & Cosmology-- Stars & Quasi-Stellar, Radio & X-Ray Sources STELLAR RADIATION STELLAR WINDS |
| title | The eclipsing millisecond pulsar PSR 1957+20 |
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