But if Omega_Lambda > 0, then H_0,t_0 can take on a range of values. Evidence from the Hubble diagram for high redshift Type Ia supernovae favors Omega_Lambda~0.7 and H_0,t_0 ~ 1. Then, if H_0 lies in the range 65--73, the age of the Universe, t_0, is 14+/-1.6 ...
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 Sloan Digital Sky Survey-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 ...
作者: S Blinnikov 摘要: Thermonuclear supernovae are valuable for cosmology but their physics is not yet fully understood. Modeling the development and propagation of nuclear flame is complicated by numerous instabilities. The predictions of their light curves still involve some simplifying assumptions...
Because Type Ia supernova are all of similar brightness, they are used as a standard candle to measure the expansion of the Universe, and this new observation by Chandra has helped to answer at least part of the long-standing – and critical — question of what triggers these bright explo...
Frieman, Joshua A.Garnavich, Peter M.Goobar, ArielarXivThe Astrophysical JournalLampeitl, H., Smith, M., Nichol, R. C., Bassett, B., Cinabro, D., Dilday, B., et al., Oct. 2010. The Effect of Host Galaxies on Type Ia Supernovae in the SDSS-II Supernova Survey. ApJ 722...
Observations of high-redshift Type Ia supernovae (SNe Ia) have provided strong evidence that the dark energy is real, and making further accurate observations of high-redshift SNe Ia is the most promising way to probe the nature of the dark energy. We discuss one of the concerns about ...
The element abundance distributions in the ejecta of Type Ia supernova (SN) is studied by modelling a time series of optical spectra of SN 2003du until ~1 ... T Masaomi,PA Mazzali,S Vallery,... - 《Monthly Notices of the Royal Astronomical Society》 被引量: 0发表: 2010年 Sub-Chandra...
Using archival data of low-redshift (z < 0.01) Type Ia supernovae (SN Ia) and recent observations of high-redshift (0.16 < z <0.64; Matheson et al. 2005) SN Ia, we study the "uniformity'' of the spectroscopic properties of nearby and distant SN Ia. We find no difference in the...
progenitorsystemsofTypeIasupernovae(SNe)remains unknown.Themostwidelyacceptedtheoreticalscenar- iosinvolvethethermonuclearexplosionofaC+Owhite dwarf(WD)destabilizedbyaccretionofmaterialfrom abinarycompanion,eitheranotherWD(doubledegen- eratesystems,DDs)oranormalstar(singledegener- ...