HR 5110 superflare: an interbinary flare identified?
Identifieur interne : 001D15 ( Main/Exploration ); précédent : 001D14; suivant : 001D16HR 5110 superflare: an interbinary flare identified?
Auteurs : V. G. Graffagnino [Royaume-Uni] ; D. Wonnacott [Royaume-Uni] ; S. Schaeidt [Allemagne]Source :
- Monthly Notices of the Royal Astronomical Society [ 0035-8711 ] ; 1995.
Abstract
A 73-ks pointed ROSAT observation revealed the RS CVn system HR 5110 to be in an outburst lasting over 3 d. Although the rise to outburst was not observed, over this 3-d period the PSPC count rate decayed to one-half of its initial value, which itself was some 4–5 times larger than the all-sky survey value. The count rate for the simultaneous WFC observations remained virtually constant throughout the pointing but was about a factor of 3.6 higher than its value during the all-sky survey. Calculations based on the spectral parameters show that a simple flare mechanism and standard two-ribbon flare models cannot explain the observations satisfactorily. This is the first time that such departures from a two-ribbon flare model have been identified unambiguously, and instead an interbinary flare is suggested as the cause of the outburst.
Url:
DOI: 10.1093/mnras/275.1.129
Affiliations:
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G." last="Graffagnino">V. G. Graffagnino</name><affiliation wicri:level="4"><orgName type="university">University College de Londres</orgName><country>Royaume-Uni</country><placeName><settlement type="city">Londres</settlement><region type="country">Angleterre</region><region type="région" nuts="1">Grand Londres</region></placeName></affiliation></author><author><name sortKey="Wonnacott, D" sort="Wonnacott, D" uniqKey="Wonnacott D" first="D." last="Wonnacott">D. Wonnacott</name><affiliation wicri:level="4"><orgName type="university">University College de Londres</orgName><country>Royaume-Uni</country><placeName><settlement type="city">Londres</settlement><region type="country">Angleterre</region><region type="région" nuts="1">Grand Londres</region></placeName></affiliation></author><author><name sortKey="Schaeidt, S" sort="Schaeidt, S" uniqKey="Schaeidt S" first="S." last="Schaeidt">S. Schaeidt</name><affiliation wicri:level="1"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Max-Planck-Institut für Extraterrestrische Physik, W-8046 Garching</wicri:regionArea><wicri:noRegion>W-8046 Garching</wicri:noRegion><wicri:noRegion>W-8046 Garching</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">Monthly Notices of the Royal Astronomical Society</title><idno type="ISSN">0035-8711</idno><idno type="eISSN">1365-2966</idno><imprint><publisher>Oxford University Press</publisher><pubPlace>Oxford, UK</pubPlace><date when="1995-07-01">1995</date><biblScope unit="vol">275</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="129">129</biblScope><biblScope unit="page" to="142">142</biblScope></imprint><idno type="ISSN">0035-8711</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0035-8711</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract">A 73-ks pointed ROSAT observation revealed the RS CVn system HR 5110 to be in an outburst lasting over 3 d. Although the rise to outburst was not observed, over this 3-d period the PSPC count rate decayed to one-half of its initial value, which itself was some 4–5 times larger than the all-sky survey value. The count rate for the simultaneous WFC observations remained virtually constant throughout the pointing but was about a factor of 3.6 higher than its value during the all-sky survey. Calculations based on the spectral parameters show that a simple flare mechanism and standard two-ribbon flare models cannot explain the observations satisfactorily. This is the first time that such departures from a two-ribbon flare model have been identified unambiguously, and instead an interbinary flare is suggested as the cause of the outburst.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Royaume-Uni</li></country><region><li>Angleterre</li><li>Grand Londres</li></region><settlement><li>Londres</li></settlement><orgName><li>University College de Londres</li></orgName></list><tree><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Graffagnino, V G" sort="Graffagnino, V G" uniqKey="Graffagnino V" first="V. G." last="Graffagnino">V. G. Graffagnino</name></region><name sortKey="Wonnacott, D" sort="Wonnacott, D" uniqKey="Wonnacott D" first="D." last="Wonnacott">D. Wonnacott</name></country><country name="Allemagne"><noRegion><name sortKey="Schaeidt, S" sort="Schaeidt, S" uniqKey="Schaeidt S" first="S." last="Schaeidt">S. Schaeidt</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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