Photometric and Spectroscopic Properties of Type Ia Supernova 2018oh with Early Excess Emission from the Kepler 2 Observations
Wenxiong LiLas Cumbres Observatory, 6740 Cortona Dr. Ste. 102, Goleta, CA 93117-5575, USAXiaofeng WangPhysics Department and Tsinghua Center for Astrophysics (THCA), Tsinghua University, Beijing, 100084, People's Republic of ChinaJozsef VinkoDepartment of Astronomy, University of Texas at Austin, Austin, TX 78712, USAJ. MoPhysics Department and Tsinghua Center for Astrophysics (THCA), Tsinghua University, Beijing, 100084, People's Republic of ChinaGriffin HosseinzadehDepartment of Physics, University of California, Santa Barbara, CA 93106-9530, USADavid SandSteward Observatory, University of Arizona, 933 North Cherry Avenue, Rm. N204, Tucson, AZ 85721-0065, USAJujia ZhangYunnan Observatories (YNAO), Chinese Academy of Sciences, Kunming 650216, People's Republic of ChinaH. LinPhysics Department and Tsinghua Center for Astrophysics (THCA), Tsinghua University, Beijing, 100084, People's Republic of ChinaPTSS/TNTSNational Astronomical Observatory of China, Chinese Academy of Sciences, Beijing, 100012, People's Republic of ChinaLingzhi WangPhysics Department and Tsinghua Center for Astrophysics (THCA), Tsinghua University, Beijing, 100084, People's Republic of ChinaZhihao ChenPhysics Department and Tsinghua Center for Astrophysics (THCA), Tsinghua University, Beijing, 100084, People's Republic of ChinaDanfeng XiangPhysics Department and Tsinghua Center for Astrophysics (THCA), Tsinghua University, Beijing, 100084, People's Republic of ChinaL. RuiDepartment of Astronomy, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of ChinaFan HuangPhysics Department and Tsinghua Center for Astrophysics (THCA), Tsinghua University, Beijing, 100084, People's Republic of ChinaXue LiPhysics Department and Tsinghua Center for Astrophysics (THCA), Tsinghua University, Beijing, 100084, People's Republic of ChinaXiaodan ZhangPhysics Department and Tsinghua Center for Astrophysics (THCA), Tsinghua University, Beijing, 100084, People's Republic of ChinaLeshan LiHomer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK, USAE. BaronHomer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK, USAJames M. DerKacySchool of Science, Tianjin University of Technology, Tianjin, 300384, People's Republic of ChinaXulin ZhaoPhysics Department and Tsinghua Center for Astrophysics (THCA), Tsinghua University, Beijing, 100084, People's Republic of ChinaH. SaiPhysics Department and Tsinghua Center for Astrophysics (THCA), Tsinghua University, Beijing, 100084, People's Republic of ChinaKaicheng ZhangChinese Academy of Sciences South America Center for Astronomy, China-Chile Joint Center for Astronomy, Camino El Observatorio 1515, Las Condes, Santiago, ChileLCOLas Cumbres Observatory, 6740 Cortona Dr. Ste. 102, Goleta, CA 93117-5575, USAD. A. HowellLas Cumbres Observatory, 6740 Cortona Dr. Ste. 102, Goleta, CA 93117-5575, USACurtis McCullyDepartment of Physics, University of California, Davis, CA 95616, USAIair ArcaviLas Cumbres Observatory, 6740 Cortona Dr. Ste. 102, Goleta, CA 93117-5575, USAStefano ValentiLas Cumbres Observatory, 6740 Cortona Dr. Ste. 102, Goleta, CA 93117-5575, USADaichi HiramatsuSpace Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USAJamison BurkeDepartment of Physics, University of Notre Dame, 225 Nieuwland Science Hall, Notre Dame, IN 46556-5670, USAKEGSThe ARC Centre of Excellence for All-Sky Astrophysics in 3 Dimension (ASTRO 3D), AustraliaA. RestSpace Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USAP. GarnavichAstronomy Department, University of Maryland, College Park, MD 20742-2421, USAB. TuckerGemini Observatory, Southern Operations Center, c/o AURA, Casilla 603, La Serena, ChileGautham NarayanCerro Tololo Inter-American Observatory, Casilla 603, La Serena, ChileE. ShayaHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USAS. MargheimDepartment of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USAA. ZentenoDepartment of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USAV. Ashley VillarDepartment of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USAUCSCDepartment of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USAG. DimitriadisSpace Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USAR. J. FoleyDepartment of Physics and Astronomy, Rutgers, The State University of New Jersey, 136 Frelinghuysen Road, Piscataway, NJ 08854, USAY. C. PanDepartment of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USAD. A. CoulterLawrence Berkeley National Laboratory, Berkeley, CA 94720, USAOri D. FoxDepartment of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USASaurabh W. JhaThe Observatories of the Carnegie Institution for Science, 813 Santa Barbara St., Pasadena, CA 91101, USAD. O. JonesDepartment of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USADaniel KasenDepartment of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USAC. D. KilpatrickInstitute for Astronomy, University of Hawai'i, 2680 Woodlawn Drive, Honolulu, HI 96822, USAAnthony L. PiroThe Observatories of the Carnegie Institution for Science, 813 Santa Barbara St., Pasadena, CA 91101, USAAdam G. RiessCenter for Cosmology and AstroParticle Physics (CCAPP), The Ohio State University, 191 W. Woodruff Ave., Columbus, OH 43210, USAC. Rojas-BravoThe Observatories of the Carnegie Institution for Science, 813 Santa Barbara St., Pasadena, CA 91101, USAASAS-SNCenter for Cosmology and AstroParticle Physics (CCAPP), The Ohio State University, 191 W. Woodruff Ave., Columbus, OH 43210, USAB. J. ShappeeCenter for Cosmology and AstroParticle Physics (CCAPP), The Ohio State University, 191 W. Woodruff Ave., Columbus, OH 43210, USAT. W. S. HoloienDepartment of Astronomy, The Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USAK. Z. StanekKavli Institute for Astronomy and Astrophysics, Peking University, Yi He Yuan Road 5, Hai Dian District, Beijing 100871, People's Republic of ChinaM. R. DroutAstrophysics Research Institute, Liverpool John Moores University, 146 Brownlow Hill, Liverpool L3 5RF, UKKatie AuchettlC. S. KochanekKavli Institute for Astronomy and Astrophysics, Peking University, Yi He Yuan Road 5, Hai Dian District, Beijing 100871, People's Republic of ChinaJ. S. BrownKavli Institute for Astronomy and Astrophysics, Peking University, Yi He Yuan Road 5, Hai Dian District, Beijing 100871, People's Republic of ChinaS. BoseDepartment of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, DenmarkD. BersierObservatorio Astronómico, Universidad de Valencia, E-46980 Paterna, Valencia, SpainJ. BrimacombeDepartment of Physics and Astronomy, University of Iowa, Iowa City, IA 52242, USAPing ChenPost Observatory, Lexington, MA 02421, USASubo DongMillennium Institute of Astrophysics, Santiago, ChileS. HolmboDepartment of Astronomy, The Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USAJ. A. MuñozDepartment of Physics and Astronomy, University of Iowa, Iowa City, IA 52242, USAR. L. MutelCenter for Cosmology and AstroParticle Physics (CCAPP), The Ohio State University, 191 W. Woodruff Ave., Columbus, OH 43210, USAR. S. PostDepartment of Astronomy, The Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USAJose L. PrietoDepartment of Astronomy, The Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USAJ. ShieldsAstrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Northern Ireland, BT7 1NN, UKD. TallonQueen's University Belfast, Northern Ireland, BT7 1NN, UKTodd A. ThompsonInstitute for Astronomy, University of Hawaii at Manoa, 2680 Woodlawn Drive, Honolulu, HI 96822, USAPatrick J. VallelyInstitute for Astronomy, University of Hawaii at Manoa, 2680 Woodlawn Drive, Honolulu, HI 96822, USASteven VillanuevaInstitute for Astronomy, University of Hawaii at Manoa, 2680 Woodlawn Drive, Honolulu, HI 96822, USAPan-STARRSInstitute for Astronomy, University of Hawaii at Manoa, 2680 Woodlawn Drive, Honolulu, HI 96822, USAStephen SmarttInstitute for Astronomy, University of Hawaii at Manoa, 2680 Woodlawn Drive, Honolulu, HI 96822, USAK. SmithMTA CSFK Lendület Near-Field Cosmology Research Group, Budapest, HungaryK. C. ChambersInstitute for Astronomy, University of Hawaii at Manoa, 2680 Woodlawn Drive, Honolulu, HI 96822, USAH. FlewellingInstitute for Astronomy, University of Hawaii at Manoa, 2680 Woodlawn Drive, Honolulu, HI 96822, USAM. E. HuberInstitute for Astronomy, University of Hawaii at Manoa, 2680 Woodlawn Drive, Honolulu, HI 96822, USAE. A. MagnierKonkoly Observatory, MTA CSFK, Konkoly Thege M. ut 15-17, Budapest, 1121, HungaryC. WatersKonkoly Observatory, MTA CSFK, Konkoly Thege M. ut 15-17, Budapest, 1121, HungaryA. S. B. SchultzDepartment of Astronomy, University of Texas at Austin, Austin, TX 78712, USAJ. BulgerKonkoly Observatory, MTA CSFK, Konkoly Thege M. ut 15-17, Budapest, 1121, HungaryT. LoweKonkoly Observatory, MTA CSFK, Konkoly Thege M. ut 15-17, Budapest, 1121, HungaryM. WillmanKonkoly Observatory, MTA CSFK, Konkoly Thege M. ut 15-17, Budapest, 1121, HungaryKonkoly/TexasKonkoly Observatory, MTA CSFK, Konkoly Thege M. ut 15-17, Budapest, 1121, HungaryK. SárneczkyKonkoly Observatory, MTA CSFK, Konkoly Thege M. ut 15-17, Budapest, 1121, HungaryAndrás PálKonkoly Observatory, MTA CSFK, Konkoly Thege M. ut 15-17, Budapest, 1121, HungaryJ. Craig WheelerKonkoly Observatory, MTA CSFK, Konkoly Thege M. ut 15-17, Budapest, 1121, HungaryAttila BódiKonkoly Observatory, MTA CSFK, Konkoly Thege M. ut 15-17, Budapest, 1121, HungaryZsófia BognárKonkoly Observatory, MTA CSFK, Konkoly Thege M. ut 15-17, Budapest, 1121, HungaryB. CsákKonkoly Observatory, MTA CSFK, Konkoly Thege M. ut 15-17, Budapest, 1121, HungaryB. CsehKonkoly Observatory, MTA CSFK, Konkoly Thege M. ut 15-17, Budapest, 1121, HungaryG. CsörnyeiOttó HanyeczKonkoly Observatory, MTA CSFK, Konkoly Thege M. ut 15-17, Budapest, 1121, HungaryBernadett IgnáczKonkoly Observatory, MTA CSFK, Konkoly Thege M. ut 15-17, Budapest, 1121, Hungary
2018en
ABI
Аннотация
Abstract Supernova (SN) 2018oh (ASASSN-18bt) is the first spectroscopically confirmed Type Ia supernova (SN Ia) observed in the Kepler field. The Kepler data revealed an excess emission in its early light curve, allowing us to place interesting constraints on its progenitor system. Here we present extensive optical, ultraviolet, and near-infrared photometry, as well as dense sampling of optical spectra, for this object. SN 2018oh is relatively normal in its photometric evolution, with a rise time of 18.3 ± 0.3 days and Δ m 15 ( B ) = 0.96 ± 0.03 mag, but it seems to have bluer B − V colors. We construct the “UVOIR” bolometric light curve having a peak luminosity of 1.49 × 10 43 erg s −1 , from which we derive a nickel mass as 0.55 ± 0.04 M ⊙ by fitting radiation diffusion models powered by centrally located 56 Ni. Note that the moment when nickel-powered luminosity starts to emerge is +3.85 days after the first light in the Kepler data, suggesting other origins of the early-time emission, e.g., mixing of 56 Ni to outer layers of the ejecta or interaction between the ejecta and nearby circumstellar material or a nondegenerate companion star. The spectral evolution of SN 2018oh is similar to that of a normal SN Ia but is characterized by prominent and persistent carbon absorption features. The C ii features can be detected from the early phases to about 3 weeks after the maximum light, representing the latest detection of carbon ever recorded in an SN Ia. This indicates that a considerable amount of unburned carbon exists in the ejecta of SN 2018oh and may mix into deeper layers.
Перевод пока недоступен
Идентификаторы
Цитирования и источники
Цитирований: 3Использованных источников: 0