Results 31 to 40 of about 7,025,957 (218)

The observations of Type Ia supernovae [PDF]

AIP Conference Proceedings, 2000
10 pages, aipproc LaTeX, two eps figures, to be published in "Cosmic Explosions! The Proceedings of the Tenth Maryland Conference on Astrophysics," eds, Steven S. Holt and William W.
openaire   +2 more sources

Could There Be a Hole in Type Ia Supernovae? [PDF]

The Astrophysical Journal, 2004
In the favored progenitor scenario, Type Ia supernovae arise from a white dwarf accreting material from a non-degenerate companion star. Soon after the white dwarf explodes, the ejected supernova material engulfs the companion star; two-dimensional hydrodynamical simulations by Marietta et. al.
Kasen, Daniel, Nugent, Peter, Thomas, R.C., Wang, Lifan   +3 more
openaire   +3 more sources

A statistical analysis of circumstellar material in Type Ia supernovae [PDF]

, 2013
A key tracer of the elusive progenitor systems of Type Ia supernovae (SNe Ia) is the detection of narrow blueshifted time-varying Na I D absorption lines, interpreted as evidence of circumstellar material surrounding the progenitor system.
Hadjiyska, E., Smartt, SJ, Leloudas, Georgios,, Dhawan, S, Laher, R. R., Sand, D., Bersier, D, Ellman, N., Patat, F., Valenti, S, Chen, TW, Fraser, M, Nugent, P. E., Nugent, P., Margheim, S., Foerster, F., Walton, N., Hadjiyska, E, Smartt, S., Förster, F., Pan, Y.- C., Laher, R., Simon, J. D., González Gaitán, Santiago, Nugent, PE, Sternberg, A, Walton, NA, González-Gaitán, S, Chen, T.-W., Pan, Yunxiang, Molinaro, M, Ofek, E. O., Mazzali, P, Smartt, S. J.; id_orcid, Rabinowitz, D, Sand, D, Chen, T., Gal-Yam, A, Hachinger, S., Smareglia, R, Rabinowitz, D., Knapic, C, Margheim, S, Graham, M., Mazzali, PA, Blagorodnova, N, Podsiadlowski, P, Foerster, F, Feindt, U, Taddia, Francesco,, Podsiadlowski, P., Gal-Yam, A., Walker, E. S., Chen, T.- W., Chen, T. -W., Simon, J., Pan, Y. -C, Rest, A, Howell, D. A., Graham, ML, Walker, E., Patat, F, Sullivan, M., Pan, Y. C., Hachinger, S, Young, D. R.; id_orcid, Mazzali, P., Chen, T-W, Valenti, S., Maguire, K., Simon, JD, Morrell, N, Hook, Isobel, Ellman, N, Podsiadlowski, Philipp, Leloudas, G, McKinnon, R, Walker, ES, Smareglia, R., Baltay, C., González-Gaitán, S., Graham, M. L., Smartt, S. J., Pan, Y-C, Hook, I., Feindt, U., Molinaro, M., Walton, N. A., Förster, Francisco, Howell, DA, Fraser, M., Förster, F, Taddia, F, Taddia, F., Baltay, C, Laher, RR, Young, D., Chen, T. W., Ofek, E., Hook, IM, McKinnon, R., Sullivan, M, Sternberg, A., Young, D. R., Pan, Y.-C., Pan, Y. -C., Hook, I. M., Rest, A., Gutiérrez, C, Pan, YC, Young, DR, Bersier, D., Maguire, K, Knapic, C., Ofek, EO, Blagorodnova, N., Inserra, C, Howell, D., Gutiérrez, C., Dhawan, S., Chen, T. -W, Inserra, C., Pan, Y., Leloudas, G., Morrell, N.   +124 more
core   +1 more source

DISTRIBUTED FLAMES IN TYPE Ia SUPERNOVAE [PDF]

The Astrophysical Journal, 2010
In the distributed burning regime, turbulence disrupts the internal structure of the flame, and so the idea of laminar burning propagated by conduction is no longer valid. The nature of the burning depends on the turbulent Damkohler number (Da), which steadily declines from much greater than one to less that one as the density decreases to a few 10^6 g/
Aspden, Andrew, Bell, J., Woosley, S.
openaire   +4 more sources

Optical studies of the low velocity gradient type Ia supernovae 2009an and 2009ig [PDF]

, 2011
UBVRI photometry and medium resolution spectroscopy of two Type Ia supernovae, SN 2009an and SN 2009ig, are presented. Their Δm15(B) indicate these two SNe marginally deviate from “normal” Type Ia events.
Anupama, G. C., Anto, P., Sahu, D. K., Gurugubelli, U. K.   +3 more
core   +1 more source

Misure di Distanza in Cosmologia e Supernovae di Tipo Ia [PDF]

, 2022
The observation that Type Ia Supernovae are fainter than expected given their redshift has led to the conclusion that the expansion of the universe is accelerating.
De Leone, Matteo
core  

Optical Spectra of Thermonuclear Supernovae in the Local and Distant Universe [PDF]

, 2005
This thesis is devoted to the study of optical spectra of thermonuclear supernovae, known as ``Type Ia'' supernovae (SN Ia). These violent stellar explosions, visible across a large fraction of the observable universe, are used to measure distances on ...
Blondin, Stephane
core   +1 more source

Cosmology with Type Ia Supernovae and the ZTF survey

, 2023
International audienceI will present the construction of a Hubble diagram, especially the standardisation of Type Ia Supernovae luminosity. I will then talk about the ongoing ZTF survey, which is the current state of the art low redshift survey.
Ginolin, M.
core   +3 more sources

On the Mechanism of Type Ia Supernovae

, 2006
Type Ia supernovae (SNe Ia) are one of the major tools to determine the cosmological parameters. Utilizing them as distance indicators, it is possible to geometrically survey the universe. To this end, the intrinsic scatter in the luminosities of these events needs to be calibrated using empirical relations between observables.
Röpke, F., Hillebrandt, W., Blinnikov, S.   +2 more
openaire   +3 more sources

Progenitors of Supernovae Type Ia

, 2013
6 pages, 6 figures, appeared in proceedings for "The 18th European White Dwarf Workshop"
Toonen, Silvia, Nelemans, Gijs, Bours, Madelon, Portegies Zwart, Simon, Claeys, Joke, Mennekens, Nicki, Ruiter, Ashley   +6 more
openaire   +4 more sources