A Type Ia (One-A)supernovais the nuclear explosion of a white dwarf star. This type of supernova is well known; these supernovae are used by astronomers to measure cosmological distances and the expansion of the Universe. However, the explosion mechanism of Type Ia supernovae is not well...
Stars that explode as supernovae come in two main classes. A type Ia supernova is recognized by the absence of hydrogen and the presence of elements such as silicon and sulphur in its spectrum; this class of supernova is thought to produce the majority of iron-peak elements in the ...
We report the discovery of a Type Ia supernova (SNIa) at redshift z=1.55 with the infrared detector of the Wide Field Camera 3 (WFC3-IR) on the Hubble Space Telescope (HST). This object was discovered in CANDELS imaging data of the Hubble Ultra Deep Field, and followed as part of ...
It is probably a type Ia supernova—the explosion of a low-mass stellar remnant, whose light curve can be used to measure cosmic distances. In archival Hubble Space Telescope imaging, three lensed images of the supernova are detected with relative time delays of <200 d. We predict that ...
A type Ia supernova (SN Ia) is a white dwarf (WD) [a dense, electron-degenerate vestige of a star] that has appropriated enough mass from a neighboring star that the total mass of the WD reaches a critical point. The star quickly approaches its mass limit (Chandrasekhar limit) until ...
We demonstrate that a model of a standard Type Ia supernova hitting a shell of circumstellar material produces a light curve and late-time iron-dominated spectrum that match SN 2006gy. In such a scenario, common envelope evolution of the progenitor system can synchronize envelope ejection and ...
Type Ia is caused by thermal runaway, and type II supernovae are caused by core collapse. Because the supernova "family tree" was laid out according to the light from supernovae, not their cause, there's technically also a type Ib and Ic, but since their actual cause is core ...
In a Type Ia supernova, the supernova process happens when the white dwarf in the binary accretes too much mass (anything over about 1.44 times the mass of our sun). The exact cause of the explosion is still an active area of research, but many think that the extra mass makes the co...
We use type-Ia supernovae (SNe Ia) discovered by the SDSS-II SN Survey to search for dependencies between SN Ia properties and the projected distance to the host galaxy center, using the distance as a proxy for local galaxy properties (local star-formation rate, local metallicity, etc.)....
We use type-Ia supernovae (SNe Ia) discovered by the SDSS-II SN Survey to search for dependencies between SN Ia properties and the projected distance to the host galaxy center, using the distance as a proxy for local galaxy properties (local star-formation rate, local metallicity, etc.)....