Results 21 to 30 of about 35,122 (152)

Ultraviolet Diversity of Type Ia Supernovae [PDF]

open access: yes, 2016
Ultraviolet (UV) observations of Type Ia supernovae (SNe Ia) probe the outermost layers of the explosion, and UV spectra of SNe Ia are expected to be extremely sensitive to differences in progenitor composition and the details of the explosion.
Brown, P.   +11 more
core   +3 more sources

Type Ia supernova diversity: Standardizing the candles [PDF]

open access: yes, 2007
Future use of type Ia supernovae for cosmology aims not only to determine the equation of state of dark energy, but also to constrain possible variations in its value.
Davis, T. M.   +3 more
core   +3 more sources

Near-infrared and Optical Nebular-phase Spectra of Type Ia Supernovae SN 2013aa and SN 2017cbv in NGC 5643

open access: yesThe Astrophysical Journal, 2023
We present multiwavelength time-series spectroscopy of SN 2013aa and SN 2017cbv, two Type Ia supernovae (SNe Ia) on the outskirts of the same host galaxy, NGC 5643. This work utilizes new nebular-phase near-infrared (NIR) spectra obtained by the Carnegie
Sahana Kumar   +25 more
doaj   +1 more source

Type Ia Supernovae and Cosmology

open access: yes, 2004
I discuss the use of Type Ia supernovae (SNe Ia) for cosmological distance determinations. Low-redshift SNe Ia (z < 0.1) demonstrate that the Hubble expansion is linear with H_0 = 72 +/- 8 km/s/Mpc, and that the properties of dust in other galaxies are ...
A. Balbi   +175 more
core   +1 more source

Type Ia Supernova Explosion Models [PDF]

open access: yes, 2000
Because calibrated light curves of Type Ia supernovae have become a major tool to determine the local expansion rate of the Universe and also its geometrical structure, considerable attention has been given to models of these events over the past couple ...
Aldering G   +56 more
core   +2 more sources

SN 2021hpr: A Normal Type Ia Supernova Showing Excess Emission in the Early Rising Phase

open access: yesThe Astrophysical Journal
We present extensive optical observations of a nearby Type Ia supernova (SN Ia), SN 2021hpr, located in the spiral galaxy NGC 3147 at a distance of ∼45 Mpc. Our observations cover a phase within ∼1–2 days to ∼290 days after the explosion.
Abdusamatjan Iskandar   +39 more
doaj   +1 more source

A problem with the analysis of type Ia supernovae

open access: yesOpen Astronomy, 2017
Type Ia supernovae have light curves that have widths and magnitudes that can be used for testing cosmologies and they provide one of the few direct measurements of time dilation.
Crawford David F.
doaj   +1 more source

Cosmology from Type Ia Supernovae [PDF]

open access: yes, 1998
This presentation reports on first evidence for a low-mass-density/positive-cosmological-constant universe that will expand forever, based on observations of a set of 40 high-redshift supernovae.
Aldering, G.   +27 more
core   +2 more sources

A JWST Medium-resolution MIRI Spectrum and Models of the Type Ia Supernova 2021aefx at +415 days

open access: yesThe Astrophysical Journal
We present a JWST MIRI medium-resolution spectrometer spectrum (5–27 μ m) of the Type Ia supernova (SN Ia) SN 2021aefx at +415 days past B -band maximum.
C. Ashall   +41 more
doaj   +1 more source

Bump Morphology of the CMAGIC Diagram

open access: yesThe Astrophysical Journal, 2023
We apply the color–magnitude intercept calibration method (CMAGIC) to the Nearby Supernova Factory SNe Ia spectrophotometric data set. The currently existing CMAGIC parameters are the slope and intercept of a straight line fit to the linear region in the
L. Aldoroty   +40 more
doaj   +1 more source

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