RESIDUAL HUBBLE-BUBBLE EFFECTS ON SUPERNOVA COSMOLOGY

Hubble-bubble in Iranian Folklore

Hubble-bubble has been the most common device for smoking tobacco in Iran and its neighboring. It has a folkloric name in every region. Hubble-bubble consists of a glass pitcher or pottery at the bottom, a wooden body in the middle, a wooden or plastic tube attached to the body for puffing, and a censer at the top to put tobacco and charcoal. Puffing causes the charcoal to catch fire and the to...

Foundations of supernova cosmology

Dust versus Supernova Cosmology

Here we present some critical discussions about the systematic uncertainty by dust extinction in the recent cosmological results of high-redshift Type Ia supernovae. First we argue that the currently available data do not robustly exclude the cosmologically significant extinction either by the reddening check or the dispersion argument because of the observational uncertainties, even in the cas...

Cosmology: from Hubble to Hst

The value of the Hubble constant has changed by about a factor of ten since Edwin Hubble’s pioneering measurements. The context in which we view the Universe has changed just as profoundly. Until 1964 cosmology was mostly concerned with cosmography; the spirit of this period was perhaps best captured by Sandage, “the quest for two numbers (H0 and q0).” The discovery of the Cosmic Background Rad...

Cosmology from Supernova Magnification Maps

High-z Type Ia supernovae are expected to be gravitationally lensed by the foreground distribution of largescale structure. The resulting magnification of supernovae is statistically measurable, and the angular correlation of the magnification pattern directly probes the integrated mass density along the line of sight. Measurements of cosmic magnification of supernovae therefore complements gal...