infrared

Stunning new images with Herschel

This week, a number of scientists have gathered in Madrid to discuss the first science results from the Herschel Space Telescope.    Herschel is the largest astronomical telescope ever put in space (the mirror is 3.5m wide!) and observes light at infrared to submillimetre wavelengths (50 - 550 microns), around 500 times larger than the wavelength of visible light.  Astronomers built this telescope to observe cold objects (shining at 10K or -260C) in the Universe, since these sources radiate at this wavelength.   Herschel will detect hidden star formation, cold gas, molecules and atoms, plan

The Type Ia Supernova Rate in Radio and Infrared Galaxies from the CFHT Supernova Legacy Survey

We have combined the large SN Ia database of the Canada-France-Hawaii Telescope Supernova Legacy Survey and catalogs of galaxies with photometric redshifts, VLA 1.4 GHz radio sources, and Spitzer infrared sources. We present eight SNe Ia in early-type host galaxies which have counterparts in the radio and infrared source catalogs. We find the SN Ia rate in subsets of radio and infrared early-type galaxies is ~1-5 times the rate in all early-type galaxies, and that any enhancement is always <~ 2 sigma. Rates in these subsets are consistent with
Graham et al. 2010, AJ, accepted

The Carnegie Supernova Project: First Near-Infrared Hubble Diagram to z~0.7

The Carnegie Supernova Project (CSP) is designed to measure the luminosity distance for Type Ia supernovae (SNe Ia) as a function of redshift, and to set observational constraints on the dark energy contribution to the total energy content of the Universe. The CSP differs from other projects to date in its goal of providing an I-band {rest-frame} Hubble diagram. Here we present the first results from near-infrared (NIR) observations obtained using the Magellan Baade telescope for SNe Ia with 0.1 < z < 0.7. We combine these results with
Freedman et al. 2009, ApJ, accepted

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