WFRF:(Priscila K.)
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LIBRIS Formathandbok (Information om MARC21)
| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 04128naa a2200697 4500 | |
| 001 | oai:DiVA.org:su-207842 | |
| 003 | SwePub | |
| 008 | 220818s2022 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-2078422 URI |
| 024 | 7 | a https://doi.org/10.1093/mnras/stac15252 DOI |
| 040 | a (SwePub)su | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a ref2 swepub-contenttype |
| 072 | 7 | a art2 swepub-publicationtype |
| 100 | 1 | a Sai, Hanna4 aut |
| 245 | 1 0 | a Observations of the very young Type Ia Supernova 2019np with early-excess emission |
| 264 | c 2022-06-02 | |
| 264 | 1 | b Oxford University Press (OUP),c 2022 |
| 338 | a print2 rdacarrier | |
| 520 | a Early-time radiative signals from Type Ia supernovae (SNe Ia) can provide important constraints on the explosion mechanism and the progenitor system. We present observations and analysis of SN 2019np, a nearby SN Ia discovered within 1–2 days after the explosion. Follow-up observations were conducted in optical, ultraviolet, and near-infrared bands, covering the phases from ∼−16.7 d to ∼+ 367.8 d relative to its B-band peak luminosity. The photometric and spectral evolutions of SN 2019np resemble the average behaviour of normal SNe Ia. The absolute B-band peak magnitude and the post-peak decline rate are Mmax(B) = −19.52 ± 0.47 mag and Δm15(B) = 1.04 ± 0.04 mag, respectively. No Hydrogen line has been detected in the nebular-phase spectra of SN 2019np. Assuming that the 56Ni powering the light curve is centrally located, we find that the bolometric light curve of SN 2019np shows a flux excess up to 5.0 per cent in the early phase compared to the radiative diffusion model. Such an extra radiation perhaps suggests the presence of an additional energy source beyond the radioactive decay of central nickel. Comparing the observed colour evolution with that predicted by different models, such as interactions of SN ejecta with circumstellar matter (CSM)/companion star, a double-detonation explosion from a sub-Chandrasekhar mass white dwarf (WD) and surface 56Ni mixing, we propose that the nickel mixing is more favoured for SN 2019np. | |
| 650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
| 653 | a supernovae: general | |
| 653 | a supernovae: individual: (SN2019np) | |
| 700 | 1 | a Wang, Xiaofeng4 aut |
| 700 | 1 | a Elias-Rosa, Nancy4 aut |
| 700 | 1 | a Yang, Yi4 aut |
| 700 | 1 | a Zhang, Jujia4 aut |
| 700 | 1 | a Lin, Weili4 aut |
| 700 | 1 | a Mo, Jun4 aut |
| 700 | 1 | a Piro, Anthony L.4 aut |
| 700 | 1 | a Zeng, Xiangyun4 aut |
| 700 | 1 | a Andrea, Reguitti4 aut |
| 700 | 1 | a Brown, Peter4 aut |
| 700 | 1 | a Burns, Christopher R.4 aut |
| 700 | 1 | a Cai, Yongzhi4 aut |
| 700 | 1 | a Fiore, Achille4 aut |
| 700 | 1 | a Hsiao, Eric Y.4 aut |
| 700 | 1 | a Isern, Jordi4 aut |
| 700 | 1 | a Itagaki, K.4 aut |
| 700 | 1 | a Li, Wenxiong4 aut |
| 700 | 1 | a Li, Zhitong4 aut |
| 700 | 1 | a Pessi, Priscila J.4 aut |
| 700 | 1 | a Phillips, M. M.4 aut |
| 700 | 1 | a Schuldt, Stefan4 aut |
| 700 | 1 | a Shahbandeh, Melissa4 aut |
| 700 | 1 | a Stritzinger, Maximilian D.4 aut |
| 700 | 1 | a Tomasella, Lina4 aut |
| 700 | 1 | a Vogl, Christian4 aut |
| 700 | 1 | a Wang, Bo4 aut |
| 700 | 1 | a Wang, Lingzhi4 aut |
| 700 | 1 | a Wu, Chengyuan4 aut |
| 700 | 1 | a Yang, Shengu Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)4 aut0 (Swepub:su)yash0613 |
| 700 | 1 | a Zhang, Jicheng4 aut |
| 700 | 1 | a Zhang, Tianmeng4 aut |
| 700 | 1 | a Zhang, Xinghan4 aut |
| 710 | 2 | a Stockholms universitetb Institutionen för astronomi4 org |
| 773 | 0 | t Monthly notices of the Royal Astronomical Societyd : Oxford University Press (OUP)g 514:3, s. 3541-3558q 514:3<3541-3558x 0035-8711x 1365-2966 |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-207842 |
| 856 | 4 8 | u https://doi.org/10.1093/mnras/stac1525 |
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