Catalogo Articoli (Spogli Riviste)
OPAC HELP
Titolo: Ni-56 mixing in the outer layers of SN 1987A
Autore: Mitchell, RC; Baron, E; Branch, D; Lundqvist, P; Blinnikov, S; Hauschildt, PH; Pun, CSJ;
- Indirizzi:
- Univ Oklahoma, Dept Phys & Astron, Norman, OK 73019 USA Univ Oklahoma Norman OK USA 73019 ept Phys & Astron, Norman, OK 73019 USA Stockholm Univ, Stockholm Observ, SE-13336 Saltsjobaden, Sweden Stockholm Univ Saltsjobaden Sweden SE-13336 E-13336 Saltsjobaden, Sweden Inst Theoret & Expt Phys, Moscow 117218, Russia Inst Theoret & Expt Phys Moscow Russia 117218 hys, Moscow 117218, Russia Univ Georgia, Dept Phys & Astron, Athens, GA 30602 USA Univ Georgia Athens GA USA 30602 Dept Phys & Astron, Athens, GA 30602 USA Univ Georgia, Ctr Simulat Phys, Athens, GA 30602 USA Univ Georgia Athens GA USA 30602 , Ctr Simulat Phys, Athens, GA 30602 USA NASA, Astron & Solar Phys Lab, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA NASA Greenbelt MD USA 20771 ard Space Flight Ctr, Greenbelt, MD 20771 USA
- Titolo Testata:
- ASTROPHYSICAL JOURNAL
fascicolo: 2,
volume: 556,
anno: 2001,
parte:, 1
pagine: 979 - 986
- SICI:
- 0004-637X(20010801)556:2<979:NMITOL>2.0.ZU;2-M
- Fonte:
- ISI
- Lingua:
- ENG
- Soggetto:
- LATE SPECTRAL EVOLUTION; SUPERNOVA 1987A; LIGHT-CURVE; MODEL ATMOSPHERES; LINE EMISSION; DREDGE-UP; SN-1987A; HYDRODYNAMICS; INSTABILITIES; PROGENITOR;
- Keywords:
- line : formation; nuclear reactions, nucleosynthesis, abundances; radiative transfer; supernovae : individual (SN 1987A);
- Tipo documento:
- Article
- Natura:
- Periodico
- Settore Disciplinare:
- Physical, Chemical & Earth Sciences
- Citazioni:
- 42
- Recensione:
- Indirizzi per estratti:
- Indirizzo: Mitchell, RC Univ Oklahoma, Dept Phys & Astron, 440 W Brooks St, Norman, OK 73019 USA Univ Oklahoma 440 W Brooks St Norman OK USA 73019 K 73019 USA
-
-
-
- Citazione:
- R.C. Mitchell et al., "Ni-56 mixing in the outer layers of SN 1987A", ASTROPHYS J, 556(2), 2001, pp. 979-986
Abstract
Supernova 1987A remains the most well observed and well studied supernova to date. Observations have produced excellent broadband photometric and spectroscopic coverage over a wide wavelength range at all epochs. Here we focus on the very early spectroscopic observations. Only recently have numerical models been of sufficient detail to accurately explain the observed spectra. In SN 1987A, good agreement has been found between observed and synthetic spectra for day 1, but by day 4, the predicted Balmer lines become muchweaker than the observed lines. We present the results of work based on a radiation-hydrodynamic model by Blinnikov and collaborators. Synthetic non-LTE spectra generated from this model by the general radiation transfer code PHOENIX strongly support the theory that significant mixing of Ni-56 intothe outer envelope is required to maintain strong Balmer lines. Preliminary results suggest a lower limit to the average nickel mass of 1.0 x 10(-5) M. is required above 5000 km s(-1) by day 4. PHOENIX models thus have the potential to be a sensitive probe for nickel mixing in the outer layers of asupernova.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/06/13 alle ore 04:32:20