THE VERY YOUNG TYPE Ia SUPERNOVA 2013dy: DISCOVERY, AND STRONG CARBON ABSORPTION IN EARLY-TIME SPECTRA
The Type Ia supernova (SN Ia) 2013dy in NGC 7250 (d [approximate] 13.7Mpc) was discovered by the Lick Observatory Supernova Search. Combined with a prediscovery detection by the Italian Supernova Search Project, we are able to constrain the first-light time of SN 2013dy to be only 0.10 + or - 0.05 d...
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| Veröffentlicht in: | Astrophysical journal. Letters 2013-11, Vol.778 (1), p.1-6 |
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| container_title | Astrophysical journal. Letters |
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| creator | ZHENG, WEIKANG Silverman, Jeffrey M Filippenko, Alexei V KASEN, DANIEL Nugent, Peter E Graham, Melissa Wang, Xiaofeng Valenti, Stefano Ciabattari, Fabrizio Kelly, Patrick L |
| description | The Type Ia supernova (SN Ia) 2013dy in NGC 7250 (d [approximate] 13.7Mpc) was discovered by the Lick Observatory Supernova Search. Combined with a prediscovery detection by the Italian Supernova Search Project, we are able to constrain the first-light time of SN 2013dy to be only 0.10 + or - 0.05 days (2.4 + or - 1.2 hr) before tlie first detection. This makes SN 2013dy the earliest known detection of an SN Ia. We infer an upper limit on the radius of the progenitor star of R sub(0) [ |
| doi_str_mv | 10.1088/2041-8205/778/1/L15 |
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Combined with a prediscovery detection by the Italian Supernova Search Project, we are able to constrain the first-light time of SN 2013dy to be only 0.10 + or - 0.05 days (2.4 + or - 1.2 hr) before tlie first detection. This makes SN 2013dy the earliest known detection of an SN Ia. We infer an upper limit on the radius of the progenitor star of R sub(0) [<, ~] 0.25 R sub([middot in circle]), consistent with that of a white dwarf. The light curve exhibits a broken power law with exponents of 0.88 and then 1.80. A spectrum taken 1.63 days after first light reveals aCn absorption line comparable in strength to Si II. This is the strongest C II feature ever detected in a normal SN Ia, suggesting that the progenitor star had significant unburned material. The C II line in SN 2013dy weakens rapidly and is undetected in a spectrum 7 days later, indicating that C n is detectable for only a very short time in some SNe Ia. SN 2013dy reached a B-band maximum of M sub(B) = -18.72 + or - 0.03 mag ~17.7 days after first light.</description><identifier>ISSN: 2041-8205</identifier><identifier>EISSN: 2041-8213</identifier><identifier>DOI: 10.1088/2041-8205/778/1/L15</identifier><language>eng</language><publisher>United States</publisher><subject>Approximation ; ASTROPHYSICS ; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; Carbon ; CARBON IONS ; COMPARATIVE EVALUATIONS ; DETECTION ; DIAGRAMS ; EMISSION SPECTRA ; EV RANGE ; Progenitors (astrophysics) ; Searching ; Spectra ; Stars ; SUPERNOVAE ; Supernovas ; VISIBLE RADIATION ; WHITE DWARF STARS</subject><ispartof>Astrophysical journal. 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Letters</title><description>The Type Ia supernova (SN Ia) 2013dy in NGC 7250 (d [approximate] 13.7Mpc) was discovered by the Lick Observatory Supernova Search. Combined with a prediscovery detection by the Italian Supernova Search Project, we are able to constrain the first-light time of SN 2013dy to be only 0.10 + or - 0.05 days (2.4 + or - 1.2 hr) before tlie first detection. This makes SN 2013dy the earliest known detection of an SN Ia. We infer an upper limit on the radius of the progenitor star of R sub(0) [<, ~] 0.25 R sub([middot in circle]), consistent with that of a white dwarf. The light curve exhibits a broken power law with exponents of 0.88 and then 1.80. A spectrum taken 1.63 days after first light reveals aCn absorption line comparable in strength to Si II. This is the strongest C II feature ever detected in a normal SN Ia, suggesting that the progenitor star had significant unburned material. The C II line in SN 2013dy weakens rapidly and is undetected in a spectrum 7 days later, indicating that C n is detectable for only a very short time in some SNe Ia. SN 2013dy reached a B-band maximum of M sub(B) = -18.72 + or - 0.03 mag ~17.7 days after first light.</description><subject>Approximation</subject><subject>ASTROPHYSICS</subject><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</subject><subject>Carbon</subject><subject>CARBON IONS</subject><subject>COMPARATIVE EVALUATIONS</subject><subject>DETECTION</subject><subject>DIAGRAMS</subject><subject>EMISSION SPECTRA</subject><subject>EV RANGE</subject><subject>Progenitors (astrophysics)</subject><subject>Searching</subject><subject>Spectra</subject><subject>Stars</subject><subject>SUPERNOVAE</subject><subject>Supernovas</subject><subject>VISIBLE RADIATION</subject><subject>WHITE DWARF STARS</subject><issn>2041-8205</issn><issn>2041-8213</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNqNzEFPg0AUBOCN0cRa_QVeNvHiQex7y7JdvCFdWxIEArQJJ0JhiTW1qEsP_ntp2nj2NJPJlyHkFuERQcoJA46WZOBMplM5wUmIzhkZnVa0z_86OJfkyph3AAYC5Yi0-ULRlUoLWsTLaE7zIlE0qGi2TFQaxSuPMkC7-XmisyDz44N8oF40o1mexoP3vfQ5jqj3nMVpkgdDDSKqvDQsrDx4VTRLlJ-n3jW5aKut0TenHJPli8r9hRXG88D3Qqtj3O0t3kyZqNZSQFs3UjYMOdOs5YCgG227wEG6AhGlU0MDsqpcl8t6gK0EvnbtMbk7_nam35Sm3vS6fqu73U7XfcmYLTjazqDuj-rzu_vaa9OXHxtT6-222ulub0oUwpVSMOdflDNkh9dfG8pqew</recordid><startdate>20131120</startdate><enddate>20131120</enddate><creator>ZHENG, WEIKANG</creator><creator>Silverman, Jeffrey M</creator><creator>Filippenko, Alexei V</creator><creator>KASEN, DANIEL</creator><creator>Nugent, Peter E</creator><creator>Graham, Melissa</creator><creator>Wang, Xiaofeng</creator><creator>Valenti, Stefano</creator><creator>Ciabattari, Fabrizio</creator><creator>Kelly, Patrick L</creator><scope>7TG</scope><scope>KL.</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>20131120</creationdate><title>THE VERY YOUNG TYPE Ia SUPERNOVA 2013dy: DISCOVERY, AND STRONG CARBON ABSORPTION IN EARLY-TIME SPECTRA</title><author>ZHENG, WEIKANG ; Silverman, Jeffrey M ; Filippenko, Alexei V ; KASEN, DANIEL ; Nugent, Peter E ; Graham, Melissa ; Wang, Xiaofeng ; Valenti, Stefano ; Ciabattari, Fabrizio ; Kelly, Patrick L</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-o249t-4d726ab860fcd88d2142e2f4010ede3904089611185c0d08aa9948c8d2f804b93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Approximation</topic><topic>ASTROPHYSICS</topic><topic>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</topic><topic>Carbon</topic><topic>CARBON IONS</topic><topic>COMPARATIVE EVALUATIONS</topic><topic>DETECTION</topic><topic>DIAGRAMS</topic><topic>EMISSION SPECTRA</topic><topic>EV RANGE</topic><topic>Progenitors (astrophysics)</topic><topic>Searching</topic><topic>Spectra</topic><topic>Stars</topic><topic>SUPERNOVAE</topic><topic>Supernovas</topic><topic>VISIBLE RADIATION</topic><topic>WHITE DWARF STARS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>ZHENG, WEIKANG</creatorcontrib><creatorcontrib>Silverman, Jeffrey M</creatorcontrib><creatorcontrib>Filippenko, Alexei V</creatorcontrib><creatorcontrib>KASEN, DANIEL</creatorcontrib><creatorcontrib>Nugent, Peter E</creatorcontrib><creatorcontrib>Graham, Melissa</creatorcontrib><creatorcontrib>Wang, Xiaofeng</creatorcontrib><creatorcontrib>Valenti, Stefano</creatorcontrib><creatorcontrib>Ciabattari, Fabrizio</creatorcontrib><creatorcontrib>Kelly, Patrick L</creatorcontrib><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>Astrophysical journal. Letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>ZHENG, WEIKANG</au><au>Silverman, Jeffrey M</au><au>Filippenko, Alexei V</au><au>KASEN, DANIEL</au><au>Nugent, Peter E</au><au>Graham, Melissa</au><au>Wang, Xiaofeng</au><au>Valenti, Stefano</au><au>Ciabattari, Fabrizio</au><au>Kelly, Patrick L</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>THE VERY YOUNG TYPE Ia SUPERNOVA 2013dy: DISCOVERY, AND STRONG CARBON ABSORPTION IN EARLY-TIME SPECTRA</atitle><jtitle>Astrophysical journal. Letters</jtitle><date>2013-11-20</date><risdate>2013</risdate><volume>778</volume><issue>1</issue><spage>1</spage><epage>6</epage><pages>1-6</pages><issn>2041-8205</issn><eissn>2041-8213</eissn><abstract>The Type Ia supernova (SN Ia) 2013dy in NGC 7250 (d [approximate] 13.7Mpc) was discovered by the Lick Observatory Supernova Search. Combined with a prediscovery detection by the Italian Supernova Search Project, we are able to constrain the first-light time of SN 2013dy to be only 0.10 + or - 0.05 days (2.4 + or - 1.2 hr) before tlie first detection. This makes SN 2013dy the earliest known detection of an SN Ia. We infer an upper limit on the radius of the progenitor star of R sub(0) [<, ~] 0.25 R sub([middot in circle]), consistent with that of a white dwarf. The light curve exhibits a broken power law with exponents of 0.88 and then 1.80. A spectrum taken 1.63 days after first light reveals aCn absorption line comparable in strength to Si II. This is the strongest C II feature ever detected in a normal SN Ia, suggesting that the progenitor star had significant unburned material. The C II line in SN 2013dy weakens rapidly and is undetected in a spectrum 7 days later, indicating that C n is detectable for only a very short time in some SNe Ia. SN 2013dy reached a B-band maximum of M sub(B) = -18.72 + or - 0.03 mag ~17.7 days after first light.</abstract><cop>United States</cop><doi>10.1088/2041-8205/778/1/L15</doi><tpages>6</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Approximation ASTROPHYSICS ASTROPHYSICS, COSMOLOGY AND ASTRONOMY Carbon CARBON IONS COMPARATIVE EVALUATIONS DETECTION DIAGRAMS EMISSION SPECTRA EV RANGE Progenitors (astrophysics) Searching Spectra Stars SUPERNOVAE Supernovas VISIBLE RADIATION WHITE DWARF STARS |
| title | THE VERY YOUNG TYPE Ia SUPERNOVA 2013dy: DISCOVERY, AND STRONG CARBON ABSORPTION IN EARLY-TIME SPECTRA |
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