Improving the calibration of Type Ia supernovae using late-time light curves
نویسندگان
چکیده
منابع مشابه
Improving the Calibration of Type Ia Supernovae Using Late-time Lightcurves
The use of Type Ia supernovae (SNe Ia) as cosmological standard candles is a key to solving the mystery of dark energy. Improving the calibration of SNe Ia increases their power as cosmological standard candles. We find tentative evidence for a correlation between the late-time lightcurve slope and the peak luminosity of SNe Ia in the B band; brighter SNe Ia seem to have shallower lightcurve sl...
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We extend earlier efforts to determine whether the late (t≥60d) light-curves of type Ia SNe are better explained by the escape of positrons from the ejecta or by the complete deposition of positron kinetic energy in a trapping magnetic field. We refine our selection of Ia SNe, using those that have extensive BVRI pho-tometry 35 days or more after maximum light. Assuming all SNe within a given ∆...
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We present late-epoch optical photometry (BVRI) of seven normal/superluminous Type Ia supernovae: SN 2000E, SN 2000ce, SN 2000cx, SN 2001C, SN 2001V, SN 2001bg, SN 2001dp. The photometry of these objects was obtained using a template subtraction method to eliminate galaxy light contamination during aperture photometry. We show the optical light curves of these supernovae out to epochs of up to ...
متن کاملLight curves of five type Ia supernovae at intermediate redshift
Aims. We present multi-band light curves and distances for five type Ia supernovae at intermediate redshifts, 0.18 < z < 0.27. Methods. Three telescopes on the Canary Island of La Palma, INT, NOT and JKT, were used for discovery and follow-up of type Ia supernovae in the g and r filters. Supernova fluxes were measured by simultaneously fitting a supernova and host galaxy model to the data, and ...
متن کاملBv Ri Light Curves for 29 Type Ia Supernovae
BV (RI)KC light curves are presented for 27 Type Ia supernovae discovered during the course of the Calán/Tololo Survey and for two other SNe Ia observed during the same period. Estimates of the maximum light magnitudes in the B, V , and I bands and the initial decline rate parameter ∆m15(B) are also given. Subject headings: photometry — supernovae
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2008
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2008.13614.x