Zobrazeno 1 - 10
of 574
pro vyhledávání: '"Kozma, C."'
Publikováno v:
A&A 620, A156 (2018)
We present JEKYLL, a new code for modelling of supernova (SN) spectra and lightcurves based on Monte-Carlo (MC) techniques for the radiative transfer. The code assumes spherical symmetry, homologous expansion and steady state for the matter, but is o
Externí odkaz:
http://arxiv.org/abs/1810.07165
Autor:
Lundqvist, P., Nyholm, A., Taddia, F., Sollerman, J., Johansson, J., Kozma, C., Lundqvist, N., Fransson, C., Garnavich, P. M., Kromer, M., Shappee, B. J., Goobar, A.
Publikováno v:
A&A 577, A39 (2015)
Left-over, ablated material from a possible non-degenerate companion can reveal itself after about one year in spectra of Type Ia SNe (SNe Ia). We have searched for such material in spectra of SN 2011fe (at 294 days after the explosion) and for SN 20
Externí odkaz:
http://arxiv.org/abs/1502.00589
Autor:
Larsson, J., Fransson, C., Östlin, G., Gröningsson, P., Jerkstrand, A., Kozma, C., Sollerman, J., Challis, P., Kirshner, R. P., Chevalier, R. A., Heng, K., McCray, R., Suntzeff, N. B., Bouchet, P., Crotts, A., Danziger, J., Dwek, E., France, K., Garnavich, P. M., Lawrence, S. S., Leibundgut, B., Lundqvist, P., Panagia, N., Pun, C. S. J., Smith, N., Sonneborn, G., Wang, L., Wheeler, J. C.
We present the late-time optical light curve of the ejecta of SN 1987A measured from HST imaging observations spanning the past 17 years. We find that the flux from the ejecta declined up to around year 2001, powered by the radioactive decay of 44Ti.
Externí odkaz:
http://arxiv.org/abs/1106.2300
Autor:
Leloudas, G., Stritzinger, M. D., Sollerman, J., Burns, C. R., Kozma, C., Krisciunas, K., Maund, J. R., Milne, P., Filippenko, A. V., Fransson, C., Ganeshalingam, M., Hamuy, M., Li, W., Phillips, M. M., Schmidt, B. P., Skottfelt, J., Taubenberger, S., Boldt, L., Fynbo, J. P. U., Gonzalez, L., Salvo, M., Thomas-Osip, J.
Publikováno v:
Astron.Astrophys. 505 (2009) 265-279
An extensive dataset for SN 2003hv that covers the flux evolution from maximum light to day +786 is presented. The data are combined with published nebular-phase infrared spectra, and the observations are compared to model light curves and synthetic
Externí odkaz:
http://arxiv.org/abs/0908.0537
Autor:
Mattila, S., Lundqvist, P., Sollerman, J., Kozma, C., Baron, E., Fransson, C., Leibundgut, B., Nomoto, K.
Publikováno v:
Astron.Astrophys. 443 (2005) 649
We present early time high-resolution (VLT/UVES) and late time low-resolution (VLT/FORS) optical spectra of the normal type Ia supernova, SN 2001el. The high-resolution spectra were obtained at -9 and -2 days to allow the detection of narrow hydrogen
Externí odkaz:
http://arxiv.org/abs/astro-ph/0501433
Autor:
Sollerman, J., Holland, S. T., Challis, P., Fransson, C., Garnavich, P., Kirshner, R. P., Kozma, C., Leibundgut, B., Lundqvist, P., Patat, F., Filippenko, A. V., Panagia, N., Wheeler, J. C.
The probable association with GRB 980425 immediately put SN 1998bw at the forefront of supernova research. Here, we present revised late-time BVRI light curves of the supernova, based on template images taken at the VLT. To follow the supernova to th
Externí odkaz:
http://arxiv.org/abs/astro-ph/0204498
ISO/SWS observations of SN 1987A on day 3425 show no emission in [Fe I] 24.05 microns and [Fe II] 25.99 microns down to the limits of roughly 0.39 Jy and 0.64 Jy, respectively. Assuming a homogeneous distribution of Ti-44 inside 2000 km/s and negligi
Externí odkaz:
http://arxiv.org/abs/astro-ph/0105402
Autor:
Lundqvist, P., Sollerman, J., Kozma, C., Larsson, B., Spyromilio, J., Crotts, A. P. S., Danziger, J., Kunze, D.
We report on observations of SN 1987A with ISO SWS/LWS made 9 - 11 years after the explosion. No emission from the supernova was seen. In particular, the upper limits on the fluxes of [Fe I] 24.05 microns and [Fe II] 25.99 microns on day 3999 are rou
Externí odkaz:
http://arxiv.org/abs/astro-ph/9905389
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Akademický článek
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