Results 21 to 30 of about 6,421 (225)

The Luminous Type Ia Supernova 2022ilv and Its Early Excess Emission

The Astrophysical Journal Letters, 2023
We present observations and analysis of the hostless and luminous Type Ia supernova 2022ilv, illustrating it is part of the 2003fg-like family, often referred to as super-Chandrasekhar (Ia-SC) explosions. The Asteroid Terrestrial-impact Last Alert System
Shubham Srivastav, S. J. Smartt, M. E. Huber, G. Dimitriadis, K. C. Chambers, Michael D. Fulton, Thomas Moore, F. P. Callan, James H. Gillanders, K. Maguire, M. Nicholl, Luke J. Shingles, S. A. Sim, K. W. Smith, J. P. Anderson, Thomas de Boer, Ting-Wan Chen, Hua Gao, D. R. Young   +18 more
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The Progenitors of Type Ia Supernovae [PDF]

Symposium - International Astronomical Union, 2003
Using binary population synthesis (BPS), we studied the birthrates of SNe Ia for two progenitor models – the single degenerate model and the double degenerate model. We find that the birthrates from both models are within a factor of a few comparable to those inferred observationally.
Han, Z, Podsiadlowski, P
openaire   +2 more sources

Nucleosynthesis in type Ia supernovae [PDF]

Nuclear Physics A, 1997
Among the major uncertainties involved in the Chandrasekhar mass models for Type Ia supernovae are the companion star of the accreting white dwarf (or the accretion rate that determines the carbon ignition density) and the flame speed after ignition. We present nucleosynthesis results from relatively slow deflagration (1.5 - 3 % of the sound speed) to ...
Nomoto, K., Iwamoto, K., Nakasato, N., Thielemann, F. -K., Brachwitz, F., Tsujimoto, T., Kubo, Y., Kishimoto, N.   +7 more
openaire   +2 more sources

A Systematic Study of Ia-CSM Supernovae from the ZTF Bright Transient Survey

The Astrophysical Journal, 2023
Among the supernovae (SNe) that show strong interaction with a circumstellar medium (CSM), there is a rare subclass of Type Ia supernovae, SNe Ia-CSM, which show strong narrow hydrogen emission lines much like SNe IIn but on top of a diluted Type Ia ...
Yashvi Sharma, Jesper Sollerman, Christoffer Fremling, Shrinivas R. Kulkarni, Kishalay De, Ido Irani, Steve Schulze, Nora Linn Strotjohann, Avishay Gal-Yam, Kate Maguire, Daniel A. Perley, Eric C. Bellm, Erik C. Kool, Thomas G. Brink, Rachel Bruch, Maxime Deckers, Richard Dekany, Alison Dugas, Alexei V. Filippenko, Samantha Goldwasser, Matthew J. Graham, Melissa L. Graham, Steven L. Groom, Matt Hankins, Jacob Jencson, Joel P. Johansson, Viraj Karambelkar, Mansi M. Kasliwal, Frank J. Masci, Michael S. Medford, James D. Neill, Guy Nir, Reed L. Riddle, Mickael Rigault, Tassilo Schweyer, Jacco H. Terwel, Lin Yan, Yi Yang, Yuhan Yao   +38 more
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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
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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

A Possible Surviving Companion of the SN Ia in the Galactic SNR G272.2-3.2

The Astrophysical Journal, 2023
We use the Gaia EDR3 to explore the Galactic supernova remnant (SNR) G272.2-3.2, produced by the explosion of a Type Ia supernova (SN Ia) about 7500 yr ago, to search for a surviving companion.
P. Ruiz-Lapuente, J. I. González Hernández, R. Cartier, K. Boutsia, F. Figueras, R. Canal, L. Galbany   +6 more
doaj   +1 more source

Type Ia Supernovae and Cosmology [PDF]

, 2007
Recent progress in modeling type Ia supernovae by means of 3-dimensional hydrodynamic simulations as well as several of the still open questions are addressed in this article. It will be shown that the new models have considerable predictive power which allows us to study observable properties such as light curves and spectra without adjustable non ...
Hillebrandt, W., Röpke, F.
openaire   +2 more sources

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

Using Host Galaxy Photometric Redshifts to Improve Cosmological Constraints with Type Ia Supernovae in the LSST Era

The Astrophysical Journal, 2023
We perform a rigorous cosmology analysis on simulated Type Ia supernovae (SNe Ia) and evaluate the improvement from including photometric host galaxy redshifts compared to using only the “ z _spec ” subset with spectroscopic redshifts from the host or SN.
Ayan Mitra, Richard Kessler, Surhud More, Renee Hlozek, The LSST Dark Energy Science Collaboration   +4 more
doaj   +1 more source