Results 31 to 40 of about 6,421 (225)

Four Years of Type Ia Supernovae Observed by TESS: Early-time Light-curve Shapes and Constraints on Companion Interaction Models

The Astrophysical Journal, 2023
We present 307 type Ia supernova (SN) light curves from the first 4 yr of the Transiting Exoplanet Survey Satellite mission. We use this sample to characterize the shapes of the early-time light curves, measure the rise times from first light to peak ...
M. M. Fausnaugh, P. J. Vallely, M. A. Tucker, C. S. Kochanek, B. J. Shappee, K. Z. Stanek, George R. Ricker, Roland Vanderspek, Manan Agarwal, Tansu Daylan, Rahul Jayaraman, Rebekah Hounsell, Daniel Muthukrishna   +12 more
doaj   +1 more source

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  

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

Examining the Properties of Low-luminosity Hosts of Type Ia Supernovae from ASAS-SN

The Astrophysical Journal, 2023
We present a spectroscopic analysis of 44 low-luminosity host galaxies of Type Ia supernovae (SNe Ia) detected by the All-Sky Automated Survey for Supernovae (ASAS-SN), using hydrogen, oxygen, and sulfur emission lines to measure metallicities and star ...
Thomas W.-S. Holoien, Vera L. Berger, Jason T. Hinkle, L. Galbany, Allison L. Strom, Patrick J. Vallely, Joseph P. Anderson, Konstantina Boutsia, K. D. French, Christopher S. Kochanek, Hanindyo Kuncarayakti, Joseph D. Lyman, Nidia Morrell, Jose L. Prieto, Sebastián F. Sánchez, K. Z. Stanek, Gregory L. Walth   +16 more
doaj   +1 more source

Type Ia supernovae from sub-Chandrasekhar mass white dwarfs

, 2016
We argue that detonations of sub-Chandrasekhar mass white dwarfs can lead to bright explosions with light curves and spectra similar to those of observed Type Ia supernovae.
Ruiter, A. J., Ropke, Friedrich, Hillebrandt, Wolfgang, Sim, Stuart A, Pakmor, R, Fink, M, Seitenzahl, I. R., Kromer, M   +7 more
core   +1 more source

TYPE Ia SUPERNOVA CARBON FOOTPRINTS [PDF]

The Astrophysical Journal, 2011
We present convincing evidence of unburned carbon at photospheric velocities in new observations of 5 Type Ia supernovae (SNe Ia) obtained by the Nearby Supernova Factory. These SNe are identified by examining 346 spectra from 124 SNe obtained before +2.5 d relative to maximum.
Thomas, R. C., Aldering, G., Antilogus, P., Aragon, C., Bailey, S., Baltay, C., Bongard, S., Buton, C., Canto, A., Childress, M., Chotard, N., Copin, Y., Fakhouri, H. K., Gangler, E., Hsiao, E. Y., Kerschhaggl, M., Kowalski, M., Loken, S., Nugent, P., Paech, K., Pain, R., Pecontal, E., Pereira, R., Perlmutter, S., Rabinowitz, D., Rigault, M., Rubin, D., Runge, K., Scalzo, R., Smadja, G., Tao, C., Weaver, B. A., Wu, C., Brown, P. J., Milne, P. A.   +34 more
openaire   +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

Type Ia Progenitor Hunt in Ancient Remains

, 2016
There is broad agreement that the stars which explode as Type Ia supernovae are white dwarfs. They have accreted material in a binary system until they are near the Chandrasekhar mass and detonate/deflagrate.
Kerzendorf, Wolfgang
core   +1 more source

Spectral diversity of Type Ia supernovae [PDF]

Monthly Notices of the Royal Astronomical Society, 2006
8 pages, 8 figures, uses mn2e.cls, accepted for publication by ...
James, J. Berian, Davis, Tamara M., Schmidt, Brian P., Kim, Alex G.   +3 more
openaire   +4 more sources