Discovery and Rapid Follow-up Observations of the Unusual Type II SN 2018ivc in NGC 1068
We present the discovery and high-cadence follow-up observations of SN 2018ivc, an unusual SNe II that exploded in NGC 1068 (D = 10.1 Mpc). The light curve of SN 2018ivc declines piecewise-linearly, changing slope frequently, with four clear slope changes in the first 30 days of evolution. This rapi...
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| Veröffentlicht in: | The Astrophysical journal 2020-05, Vol.895 (1), p.31 |
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| creator | Bostroem, K. A. Valenti, S. Sand, D. J. Andrews, J. E. Van Dyk, S. D. Galbany, L. Pooley, D. Amaro, R. C. Smith, N. Yang, S. Anupama, G. C. Arcavi, I. Baron, E. Brown, P. J. Burke, J. Cartier, R. Hiramatsu, D. Dastidar, R. DerKacy, J. M. Dong, Y. Egami, E. Ertel, S. Filippenko, A. V. Fox, O. D. Haislip, J. Hosseinzadeh, G. Howell, D. A. Gangopadhyay, A. Jha, S. W. Kouprianov, V. Kumar, B. Lundquist, M. Milisavljevic, D. McCully, C. Milne, P. Misra, K. Reichart, D. E. Sahu, D. K. Sai, H. Singh, A. Smith, P. S. Vinko, J. Wang, X. Wang, Y. Wheeler, J. C. Williams, G. G. Wyatt, S. Zhang, J. Zhang, X. |
| description | We present the discovery and high-cadence follow-up observations of SN 2018ivc, an unusual SNe II that exploded in NGC 1068 (D = 10.1 Mpc). The light curve of SN 2018ivc declines piecewise-linearly, changing slope frequently, with four clear slope changes in the first 30 days of evolution. This rapidly changing light curve indicates that interaction between the circumstellar material and ejecta plays a significant role in the evolution. Circumstellar interaction is further supported by a strong X-ray detection. The spectra are rapidly evolving and dominated by hydrogen, helium, and calcium emission lines. We identify a rare high-velocity emission-line feature blueshifted at ∼7800 (in H , Hβ, Pβ, Pγ, He i, and Ca ii), which is visible from day 18 until at least day 78 and could be evidence of an asymmetric progenitor or explosion. From the overall similarity between SN 2018ivc and SN 1996al, the H equivalent width of its parent H ii region, and constraints from pre-explosion archival Hubble Space Telescope images, we find that the progenitor of SN 2018ivc could be as massive as 52 but is more likely |
| doi_str_mv | 10.3847/1538-4357/ab8945 |
| format | Article |
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A. ; Valenti, S. ; Sand, D. J. ; Andrews, J. E. ; Van Dyk, S. D. ; Galbany, L. ; Pooley, D. ; Amaro, R. C. ; Smith, N. ; Yang, S. ; Anupama, G. C. ; Arcavi, I. ; Baron, E. ; Brown, P. J. ; Burke, J. ; Cartier, R. ; Hiramatsu, D. ; Dastidar, R. ; DerKacy, J. M. ; Dong, Y. ; Egami, E. ; Ertel, S. ; Filippenko, A. V. ; Fox, O. D. ; Haislip, J. ; Hosseinzadeh, G. ; Howell, D. A. ; Gangopadhyay, A. ; Jha, S. W. ; Kouprianov, V. ; Kumar, B. ; Lundquist, M. ; Milisavljevic, D. ; McCully, C. ; Milne, P. ; Misra, K. ; Reichart, D. E. ; Sahu, D. K. ; Sai, H. ; Singh, A. ; Smith, P. S. ; Vinko, J. ; Wang, X. ; Wang, Y. ; Wheeler, J. C. ; Williams, G. G. ; Wyatt, S. ; Zhang, J. ; Zhang, X.</creator><creatorcontrib>Bostroem, K. A. ; Valenti, S. ; Sand, D. J. ; Andrews, J. E. ; Van Dyk, S. D. ; Galbany, L. ; Pooley, D. ; Amaro, R. C. ; Smith, N. ; Yang, S. ; Anupama, G. C. ; Arcavi, I. ; Baron, E. ; Brown, P. J. ; Burke, J. ; Cartier, R. ; Hiramatsu, D. ; Dastidar, R. ; DerKacy, J. M. ; Dong, Y. ; Egami, E. ; Ertel, S. ; Filippenko, A. V. ; Fox, O. D. ; Haislip, J. ; Hosseinzadeh, G. ; Howell, D. A. ; Gangopadhyay, A. ; Jha, S. W. ; Kouprianov, V. ; Kumar, B. ; Lundquist, M. ; Milisavljevic, D. ; McCully, C. ; Milne, P. ; Misra, K. ; Reichart, D. E. ; Sahu, D. K. ; Sai, H. ; Singh, A. ; Smith, P. S. ; Vinko, J. ; Wang, X. ; Wang, Y. ; Wheeler, J. C. ; Williams, G. G. ; Wyatt, S. ; Zhang, J. ; Zhang, X.</creatorcontrib><description>We present the discovery and high-cadence follow-up observations of SN 2018ivc, an unusual SNe II that exploded in NGC 1068 (D = 10.1 Mpc). The light curve of SN 2018ivc declines piecewise-linearly, changing slope frequently, with four clear slope changes in the first 30 days of evolution. This rapidly changing light curve indicates that interaction between the circumstellar material and ejecta plays a significant role in the evolution. Circumstellar interaction is further supported by a strong X-ray detection. The spectra are rapidly evolving and dominated by hydrogen, helium, and calcium emission lines. We identify a rare high-velocity emission-line feature blueshifted at ∼7800 (in H , Hβ, Pβ, Pγ, He i, and Ca ii), which is visible from day 18 until at least day 78 and could be evidence of an asymmetric progenitor or explosion. From the overall similarity between SN 2018ivc and SN 1996al, the H equivalent width of its parent H ii region, and constraints from pre-explosion archival Hubble Space Telescope images, we find that the progenitor of SN 2018ivc could be as massive as 52 but is more likely <12 . SN 2018ivc demonstrates the importance of the early discovery and rapid follow-up observations of nearby supernovae to study the physics and progenitors of these cosmic explosions.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.3847/1538-4357/ab8945</identifier><language>eng</language><publisher>Philadelphia: The American Astronomical Society</publisher><subject>Astrophysics ; Circumstellar gas ; Core-collapse supernovae ; Ejecta ; Emission ; Emission lines ; Evolution ; Explosions ; Helium ; Hubble Space Telescope ; Hydrogen ; Light curve ; Slopes ; Space telescopes ; Supernovae ; Type II supernovae</subject><ispartof>The Astrophysical journal, 2020-05, Vol.895 (1), p.31</ispartof><rights>2020. The American Astronomical Society. 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A.</creatorcontrib><creatorcontrib>Valenti, S.</creatorcontrib><creatorcontrib>Sand, D. J.</creatorcontrib><creatorcontrib>Andrews, J. E.</creatorcontrib><creatorcontrib>Van Dyk, S. D.</creatorcontrib><creatorcontrib>Galbany, L.</creatorcontrib><creatorcontrib>Pooley, D.</creatorcontrib><creatorcontrib>Amaro, R. C.</creatorcontrib><creatorcontrib>Smith, N.</creatorcontrib><creatorcontrib>Yang, S.</creatorcontrib><creatorcontrib>Anupama, G. C.</creatorcontrib><creatorcontrib>Arcavi, I.</creatorcontrib><creatorcontrib>Baron, E.</creatorcontrib><creatorcontrib>Brown, P. J.</creatorcontrib><creatorcontrib>Burke, J.</creatorcontrib><creatorcontrib>Cartier, R.</creatorcontrib><creatorcontrib>Hiramatsu, D.</creatorcontrib><creatorcontrib>Dastidar, R.</creatorcontrib><creatorcontrib>DerKacy, J. M.</creatorcontrib><creatorcontrib>Dong, Y.</creatorcontrib><creatorcontrib>Egami, E.</creatorcontrib><creatorcontrib>Ertel, S.</creatorcontrib><creatorcontrib>Filippenko, A. 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C.</creatorcontrib><creatorcontrib>Williams, G. G.</creatorcontrib><creatorcontrib>Wyatt, S.</creatorcontrib><creatorcontrib>Zhang, J.</creatorcontrib><creatorcontrib>Zhang, X.</creatorcontrib><title>Discovery and Rapid Follow-up Observations of the Unusual Type II SN 2018ivc in NGC 1068</title><title>The Astrophysical journal</title><addtitle>APJ</addtitle><addtitle>Astrophys. J</addtitle><description>We present the discovery and high-cadence follow-up observations of SN 2018ivc, an unusual SNe II that exploded in NGC 1068 (D = 10.1 Mpc). The light curve of SN 2018ivc declines piecewise-linearly, changing slope frequently, with four clear slope changes in the first 30 days of evolution. This rapidly changing light curve indicates that interaction between the circumstellar material and ejecta plays a significant role in the evolution. Circumstellar interaction is further supported by a strong X-ray detection. The spectra are rapidly evolving and dominated by hydrogen, helium, and calcium emission lines. We identify a rare high-velocity emission-line feature blueshifted at ∼7800 (in H , Hβ, Pβ, Pγ, He i, and Ca ii), which is visible from day 18 until at least day 78 and could be evidence of an asymmetric progenitor or explosion. From the overall similarity between SN 2018ivc and SN 1996al, the H equivalent width of its parent H ii region, and constraints from pre-explosion archival Hubble Space Telescope images, we find that the progenitor of SN 2018ivc could be as massive as 52 but is more likely <12 . SN 2018ivc demonstrates the importance of the early discovery and rapid follow-up observations of nearby supernovae to study the physics and progenitors of these cosmic explosions.</description><subject>Astrophysics</subject><subject>Circumstellar gas</subject><subject>Core-collapse supernovae</subject><subject>Ejecta</subject><subject>Emission</subject><subject>Emission lines</subject><subject>Evolution</subject><subject>Explosions</subject><subject>Helium</subject><subject>Hubble Space Telescope</subject><subject>Hydrogen</subject><subject>Light curve</subject><subject>Slopes</subject><subject>Space telescopes</subject><subject>Supernovae</subject><subject>Type II supernovae</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp9kM9LwzAYhoMoOKd3jwE9Wpc0P5oeZbo5GBvoBruFtEmwozY1aSf7722p6EU8fXwfz_t-8ABwjdE9ETSZYEZERAlLJioTKWUnYPRzOgUjhBCNOEl25-AihH2_xmk6ArvHIuTuYPwRqkrDF1UXGs5cWbrPqK3hOgvGH1RTuCpAZ2HzZuC2akOrSrg51gYuFvB1BWOERXHIYVHB1XwKMeLiEpxZVQZz9T3HYDt72kyfo-V6vpg-LKOcUtZEeUwSpC2yRORYE55SkaCEM5LaTGco40ooi7QwWc6NIDHVQrO4689TzrAQZAxuht7au4_WhEbuXeur7qWMKeKcic5OR6GByr0LwRsra1-8K3-UGMnen-xlyV6WHPx1kbshUrj6t_Mf_PYPXNV7KVImsSRY1tqSL0a-egw</recordid><startdate>20200501</startdate><enddate>20200501</enddate><creator>Bostroem, K. 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A. ; Valenti, S. ; Sand, D. J. ; Andrews, J. E. ; Van Dyk, S. D. ; Galbany, L. ; Pooley, D. ; Amaro, R. C. ; Smith, N. ; Yang, S. ; Anupama, G. C. ; Arcavi, I. ; Baron, E. ; Brown, P. J. ; Burke, J. ; Cartier, R. ; Hiramatsu, D. ; Dastidar, R. ; DerKacy, J. M. ; Dong, Y. ; Egami, E. ; Ertel, S. ; Filippenko, A. V. ; Fox, O. D. ; Haislip, J. ; Hosseinzadeh, G. ; Howell, D. A. ; Gangopadhyay, A. ; Jha, S. W. ; Kouprianov, V. ; Kumar, B. ; Lundquist, M. ; Milisavljevic, D. ; McCully, C. ; Milne, P. ; Misra, K. ; Reichart, D. E. ; Sahu, D. K. ; Sai, H. ; Singh, A. ; Smith, P. S. ; Vinko, J. ; Wang, X. ; Wang, Y. ; Wheeler, J. C. ; Williams, G. 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G.</creatorcontrib><creatorcontrib>Wyatt, S.</creatorcontrib><creatorcontrib>Zhang, J.</creatorcontrib><creatorcontrib>Zhang, X.</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Bostroem, K. A.</au><au>Valenti, S.</au><au>Sand, D. J.</au><au>Andrews, J. E.</au><au>Van Dyk, S. D.</au><au>Galbany, L.</au><au>Pooley, D.</au><au>Amaro, R. C.</au><au>Smith, N.</au><au>Yang, S.</au><au>Anupama, G. C.</au><au>Arcavi, I.</au><au>Baron, E.</au><au>Brown, P. J.</au><au>Burke, J.</au><au>Cartier, R.</au><au>Hiramatsu, D.</au><au>Dastidar, R.</au><au>DerKacy, J. M.</au><au>Dong, Y.</au><au>Egami, E.</au><au>Ertel, S.</au><au>Filippenko, A. V.</au><au>Fox, O. D.</au><au>Haislip, J.</au><au>Hosseinzadeh, G.</au><au>Howell, D. A.</au><au>Gangopadhyay, A.</au><au>Jha, S. W.</au><au>Kouprianov, V.</au><au>Kumar, B.</au><au>Lundquist, M.</au><au>Milisavljevic, D.</au><au>McCully, C.</au><au>Milne, P.</au><au>Misra, K.</au><au>Reichart, D. E.</au><au>Sahu, D. K.</au><au>Sai, H.</au><au>Singh, A.</au><au>Smith, P. S.</au><au>Vinko, J.</au><au>Wang, X.</au><au>Wang, Y.</au><au>Wheeler, J. C.</au><au>Williams, G. G.</au><au>Wyatt, S.</au><au>Zhang, J.</au><au>Zhang, X.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Discovery and Rapid Follow-up Observations of the Unusual Type II SN 2018ivc in NGC 1068</atitle><jtitle>The Astrophysical journal</jtitle><stitle>APJ</stitle><addtitle>Astrophys. J</addtitle><date>2020-05-01</date><risdate>2020</risdate><volume>895</volume><issue>1</issue><spage>31</spage><pages>31-</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><abstract>We present the discovery and high-cadence follow-up observations of SN 2018ivc, an unusual SNe II that exploded in NGC 1068 (D = 10.1 Mpc). The light curve of SN 2018ivc declines piecewise-linearly, changing slope frequently, with four clear slope changes in the first 30 days of evolution. This rapidly changing light curve indicates that interaction between the circumstellar material and ejecta plays a significant role in the evolution. Circumstellar interaction is further supported by a strong X-ray detection. The spectra are rapidly evolving and dominated by hydrogen, helium, and calcium emission lines. We identify a rare high-velocity emission-line feature blueshifted at ∼7800 (in H , Hβ, Pβ, Pγ, He i, and Ca ii), which is visible from day 18 until at least day 78 and could be evidence of an asymmetric progenitor or explosion. From the overall similarity between SN 2018ivc and SN 1996al, the H equivalent width of its parent H ii region, and constraints from pre-explosion archival Hubble Space Telescope images, we find that the progenitor of SN 2018ivc could be as massive as 52 but is more likely <12 . SN 2018ivc demonstrates the importance of the early discovery and rapid follow-up observations of nearby supernovae to study the physics and progenitors of these cosmic explosions.</abstract><cop>Philadelphia</cop><pub>The American Astronomical Society</pub><doi>10.3847/1538-4357/ab8945</doi><tpages>20</tpages><orcidid>https://orcid.org/0000-0003-0123-0062</orcidid><orcidid>https://orcid.org/0000-0002-7566-6080</orcidid><orcidid>https://orcid.org/0000-0001-8818-0795</orcidid><orcidid>https://orcid.org/0000-0001-8738-6011</orcidid><orcidid>https://orcid.org/0000-0001-8764-7832</orcidid><orcidid>https://orcid.org/0000-0003-3460-0103</orcidid><orcidid>https://orcid.org/0000-0002-8296-2590</orcidid><orcidid>https://orcid.org/0000-0001-9038-9950</orcidid><orcidid>https://orcid.org/0000-0001-5510-2424</orcidid><orcidid>https://orcid.org/0000-0002-2898-6532</orcidid><orcidid>https://orcid.org/0000-0001-5807-7893</orcidid><orcidid>https://orcid.org/0000-0002-1125-9187</orcidid><orcidid>https://orcid.org/0000-0002-0370-157X</orcidid><orcidid>https://orcid.org/0000-0002-0832-2974</orcidid><orcidid>https://orcid.org/0000-0003-4897-7833</orcidid><orcidid>https://orcid.org/0000-0002-3884-5637</orcidid><orcidid>https://orcid.org/0000-0003-4102-380X</orcidid><orcidid>https://orcid.org/0000-0002-1296-6887</orcidid><orcidid>https://orcid.org/0000-0002-5060-3673</orcidid><orcidid>https://orcid.org/0000-0001-7225-2475</orcidid><orcidid>https://orcid.org/0000-0002-3452-0560</orcidid><orcidid>https://orcid.org/0000-0003-2238-1572</orcidid><orcidid>https://orcid.org/0000-0003-1637-267X</orcidid><orcidid>https://orcid.org/0000-0002-4924-444X</orcidid><orcidid>https://orcid.org/0000-0001-7090-4898</orcidid><orcidid>https://orcid.org/0000-0003-1349-6538</orcidid><orcidid>https://orcid.org/0000-0001-6272-5507</orcidid><orcidid>https://orcid.org/0000-0002-2314-7289</orcidid><orcidid>https://orcid.org/0000-0003-4253-656X</orcidid><orcidid>https://orcid.org/0000-0002-7334-2357</orcidid><orcidid>https://orcid.org/0000-0001-6191-7160</orcidid><orcidid>https://orcid.org/0000-0001-9589-3793</orcidid><orcidid>https://orcid.org/0000-0003-2091-622X</orcidid><orcidid>https://orcid.org/0000-0002-7531-603X</orcidid><orcidid>https://orcid.org/0000-0003-3533-7183</orcidid><orcidid>https://orcid.org/0000-0001-5393-1608</orcidid><orcidid>https://orcid.org/0000-0002-1546-9763</orcidid><orcidid>https://orcid.org/0000-0002-0763-3885</orcidid><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext_linktorsrc |
| identifier | ISSN: 0004-637X |
| ispartof | The Astrophysical journal, 2020-05, Vol.895 (1), p.31 |
| issn | 0004-637X 1538-4357 |
| language | eng |
| recordid | cdi_crossref_primary_10_3847_1538_4357_ab8945 |
| source | Institute of Physics Open Access Journal Titles |
| subjects | Astrophysics Circumstellar gas Core-collapse supernovae Ejecta Emission Emission lines Evolution Explosions Helium Hubble Space Telescope Hydrogen Light curve Slopes Space telescopes Supernovae Type II supernovae |
| title | Discovery and Rapid Follow-up Observations of the Unusual Type II SN 2018ivc in NGC 1068 |
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