Detection of stellar spots from the observations of caustic-crossing binary-lens gravitational microlensing events
Recently, Heyrovský & Sasselov investigated the sensitivity of single-lens gravitational microlensing event light curves to spots and found that, during source transit, spots can cause deviations in amplification larger than 2 per cent, and thus be detectable. In this paper, we explore the feasi...
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| Veröffentlicht in: | Monthly notices of the Royal Astronomical Society 2000-08, Vol.316 (3), p.665-670, Article 665 |
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| creator | Han, Cheongho Park, Seong-Hong Kim, Ho-Il Chang, Kyongae |
| description | Recently, Heyrovský & Sasselov investigated the sensitivity of single-lens gravitational microlensing event light curves to spots and found that, during source transit, spots can cause deviations in amplification larger than 2 per cent, and thus be detectable. In this paper, we explore the feasibility of spot detection from the observations of binary-lens microlensing events instead of single-lens events. For this we investigate the sensitivity of binary-lens event light curves to spots and compare it with that of single-lens events. From this investigation, we find that during caustic crossings the fractional amplification deviations of light curves from those of spotless source events are equivalent to those of single-lens events, implying that spots can also be detected with a similar photometric precision to that required for spot detection by observing single-lens events. We discuss the relative advantages of observing binary-lens events over the observations of single-lens events in detecting stellar spots. |
| doi_str_mv | 10.1046/j.1365-8711.2000.03534.x |
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In this paper, we explore the feasibility of spot detection from the observations of binary-lens microlensing events instead of single-lens events. For this we investigate the sensitivity of binary-lens event light curves to spots and compare it with that of single-lens events. From this investigation, we find that during caustic crossings the fractional amplification deviations of light curves from those of spotless source events are equivalent to those of single-lens events, implying that spots can also be detected with a similar photometric precision to that required for spot detection by observing single-lens events. We discuss the relative advantages of observing binary-lens events over the observations of single-lens events in detecting stellar spots.</description><identifier>ISSN: 0035-8711</identifier><identifier>EISSN: 1365-2966</identifier><identifier>DOI: 10.1046/j.1365-8711.2000.03534.x</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Science Ltd</publisher><subject>binaries: general ; gravitational lensing ; stars: activity</subject><ispartof>Monthly notices of the Royal Astronomical Society, 2000-08, Vol.316 (3), p.665-670, Article 665</ispartof><rights>2000 RAS 2000</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c5404-c3622f6708e11402be5fc5b5835f7852eae4993d8ddcc7778df5b1c5f09859173</citedby><cites>FETCH-LOGICAL-c5404-c3622f6708e11402be5fc5b5835f7852eae4993d8ddcc7778df5b1c5f09859173</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1046%2Fj.1365-8711.2000.03534.x$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1046%2Fj.1365-8711.2000.03534.x$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,27924,27925,45574,45575</link.rule.ids></links><search><creatorcontrib>Han, Cheongho</creatorcontrib><creatorcontrib>Park, Seong-Hong</creatorcontrib><creatorcontrib>Kim, Ho-Il</creatorcontrib><creatorcontrib>Chang, Kyongae</creatorcontrib><title>Detection of stellar spots from the observations of caustic-crossing binary-lens gravitational microlensing events</title><title>Monthly notices of the Royal Astronomical Society</title><addtitle>Mon. 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We discuss the relative advantages of observing binary-lens events over the observations of single-lens events in detecting stellar spots.</description><subject>binaries: general</subject><subject>gravitational lensing</subject><subject>stars: activity</subject><issn>0035-8711</issn><issn>1365-2966</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><recordid>eNqNkUuLFDEUhYMo2I7-h6zcVZlUnrVQkPExDq2CqIibkEonY9rqSk-Sbnv-vUnV4EIUZpVw73fu5ZwLAMSoxYjyZ9sWE84aKTBuO4RQiwgjtD3dA6u50fWc3wcrVMoz9BA8SmlbQEo6vgLxlc3WZB8mGBxM2Y6jjjDtQ07QxbCD-YeFYUg2HnWlUsWMPqTsTWNiSMlPV3Dwk443zWhL_yrqo88zrEe48wWq9YrZo51yegweOD0m--T2PQNf3rz-fH7RrD--fXf-ct0YRhFtDOFd57hA0mJMUTdY5gwbmCTMCck6qy3te7KRm40xQgi5cWzAhjnUS9ZjQc7A02XuPobrg01Z7Xwy1eBkwyGpTtBelE0FlAs4-4nWqX30u2JIYaRqyGqrapaq5qdqyGoOWZ2K9MVfUnPrPUftx7sMeL4M-OVHe3Pnxer9h0_1V_Rk0YfD_j_q5l9bm0Xly8VPf3Q6_lRcEMHUxbfviq8v11-FpOqS_AaPordf</recordid><startdate>20000811</startdate><enddate>20000811</enddate><creator>Han, Cheongho</creator><creator>Park, Seong-Hong</creator><creator>Kim, Ho-Il</creator><creator>Chang, Kyongae</creator><general>Blackwell Science Ltd</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20000811</creationdate><title>Detection of stellar spots from the observations of caustic-crossing binary-lens gravitational microlensing events</title><author>Han, Cheongho ; Park, Seong-Hong ; Kim, Ho-Il ; Chang, Kyongae</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c5404-c3622f6708e11402be5fc5b5835f7852eae4993d8ddcc7778df5b1c5f09859173</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2000</creationdate><topic>binaries: general</topic><topic>gravitational lensing</topic><topic>stars: activity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Han, Cheongho</creatorcontrib><creatorcontrib>Park, Seong-Hong</creatorcontrib><creatorcontrib>Kim, Ho-Il</creatorcontrib><creatorcontrib>Chang, Kyongae</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Monthly notices of the Royal Astronomical Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Han, Cheongho</au><au>Park, Seong-Hong</au><au>Kim, Ho-Il</au><au>Chang, Kyongae</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Detection of stellar spots from the observations of caustic-crossing binary-lens gravitational microlensing events</atitle><jtitle>Monthly notices of the Royal Astronomical Society</jtitle><stitle>Mon. Not. R. Astron. Soc</stitle><addtitle>Mon. Not. R. Astron. Soc</addtitle><date>2000-08-11</date><risdate>2000</risdate><volume>316</volume><issue>3</issue><spage>665</spage><epage>670</epage><pages>665-670</pages><artnum>665</artnum><issn>0035-8711</issn><eissn>1365-2966</eissn><abstract>Recently, Heyrovský & Sasselov investigated the sensitivity of single-lens gravitational microlensing event light curves to spots and found that, during source transit, spots can cause deviations in amplification larger than 2 per cent, and thus be detectable. In this paper, we explore the feasibility of spot detection from the observations of binary-lens microlensing events instead of single-lens events. For this we investigate the sensitivity of binary-lens event light curves to spots and compare it with that of single-lens events. From this investigation, we find that during caustic crossings the fractional amplification deviations of light curves from those of spotless source events are equivalent to those of single-lens events, implying that spots can also be detected with a similar photometric precision to that required for spot detection by observing single-lens events. We discuss the relative advantages of observing binary-lens events over the observations of single-lens events in detecting stellar spots.</abstract><cop>Oxford, UK</cop><pub>Blackwell Science Ltd</pub><doi>10.1046/j.1365-8711.2000.03534.x</doi><tpages>6</tpages><oa>free_for_read</oa></addata></record> |
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| source | Access via Wiley Online Library; Oxford Journals Open Access Collection |
| subjects | binaries: general gravitational lensing stars: activity |
| title | Detection of stellar spots from the observations of caustic-crossing binary-lens gravitational microlensing events |
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