Photometric and Spectroscopic Properties of Type Ia Supernova 2018oh with Early Excess Emission from the Kepler 2 Observations

التفاصيل البيبلوغرافية
العنوان:	Photometric and Spectroscopic Properties of Type Ia Supernova 2018oh with Early Excess Emission from the Kepler 2 Observations
المؤلفون:	Thomas Barclay, W. Li, X. Wang, J. Vinko, J. Mo, G. Hosseinzadeh, D. J. Sand, J. Zhang, H. Lin, T. Zhang, L. Wang, Z. Chen, D. Xiang, L. Rui, F. Huang, X. Li, X. Zhang, L. Li, E. Baron, J. M. Derkacy, X. Zhao, H. Sai, K. Zhang, D. A. Howell, C. McCully, I. Arcavi, S. Valenti, D. Hiramatsu, J. Burke, A. Rest, P. Garnavich, B. E. Tucker, G. Narayan, E. Shaya, S. Margheim, A. Zenteno, A. Villar, G. Dimitriadis, R. J. Foley, Y.-C. Pan, D. A. Coulter, O. D. Fox, S. W. Jha, D. O. Jones, D. N. Kasen, C. D. Kilpatrick, A. L. Piro, A. G. Riess, C. Rojas-Bravo, B. J. Shappee, T. W.-S. Holoien, K. Z. Stanek, M. R. Drout, K. Auchettl, C. S. Kochanek, J. S. Brown, S. Bose, D. Bersier, J. Brimacombe, P. Chen, S. Dong, S. Holmbo, J. A. Munoz, R. L. Mutel, R. S. Post, J. L. Prieto, J. Shields, D. Tallon, T. A. Thompson, P. J. Vallely, S. Villanueva Jr, S. J. Smartt, K. W. Smith, K. C. Chambers, H. A. Flewelling, M. E. Huber, E. A. Magnier, C. Z. Waters, A. S. B. Schultz, J. Bulger, T. B. Lowe, M. Willman, K. Sarneczky, A. Pal, J. C. Wheeler, A. Bodi, Zs. Bognar, B. Csak, B. Cseh, G. Csornyei, O. Hanyecz, B. Ignacz, Cs. Kalup, R. Konyves-Toth, L. Kriskovics, A. Ordasi, I. Rajmon5, A. Sodor, R. Szabo, R. Szakats, G. Zsidi, P. Milne, J. E. Andrews, N. Smith, C. Bilinski, P. J. Brown, J. Nordin, S. C. Williams, L. Galbany, J. Palmerio, I. M. Hook, C. Inserra, K. Maguire, Regis Cartier, A. Razza, C. P. Gutierrez, J. J. Hermes, J. S. Reding, B. C. Kaiser, J. L. Tonry, A. N. Heinze, L. Denneau, H. Weiland, B. Stalder, G. Barentsen, J Dotson, T Barclay, M Gully-Santiago, C. Hedges, A. M. Cody, S Howell, J. Coughlin, J. E. Van Cleve, J. Vinicius de Miranda Cardoso, K. A. Larson, K. M. McCalmont-Everton, C. A. Peterson, S. E. Ross, L. H. Reedy, D. Osborne, C. McGinn, L. Kohnert, L. Migliorini, A. Wheaton, B. Spencer, C. Labonde, G. Castillo, G. Beerman, K. Steward, M. Hanley, R. Larsen, R. Gangopadhyay, R. Kloetzel, T. Weschler, V. Nystrom, J. Moffatt, M. Redick, K. Griest, M. Packard, M. Muszynski, J. Kampmeier, R. Bjella, S. Flynn, B. Elsaesser
المصدر:	The Astrophysical Journal. 870(1)
بيانات النشر:	United States: NASA Center for Aerospace Information (CASI), 2018.
سنة النشر:	2018
مصطلحات موضوعية:	Astrophysics, Astronomy
الوصف:	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 nearinfrared 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(m15)(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(Exp 43) erg/s, from which we derive a nickel mass as 0.55±0.04M(ʘ) by ﬁtting radiation diffusion models powered by centrally located 56Ni. 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 56Ni 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.
نوع الوثيقة:	Report
اللغة:	English
تدمد:	1538-4357 0004-637X
DOI:	10.3847/1538-4357/aaec74
الوصول الحر:	https://ntrs.nasa.gov/citations/20205004176Test
ملاحظات:	80GSFC17M0002 PF6-170148 NNX13AF35G NNX16AB5G #HST-HF2-51357.001-A NAS5-26555 NNX17AE92G NNG17PX03C 80NSSC18K0303 NNX17AI64G 80NSSC18K0302
رقم الانضمام:	edsnas.20205004176
قاعدة البيانات:	NASA Technical Reports

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الوصف
تدمد:	15384357 0004637X
DOI:	10.3847/1538-4357/aaec74