Download or read book Infrared Light Curves of Type Ia Supernovae written by Andrew Samuel Friedman and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Light Curves of Type Ia Supernovae written by Charles Hamilton Ford and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Supernovae written by Athem W. Alsabti and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Light Curves of Type Ia Supernovae written by Gertrud Contardo and published by . This book was released on 2001 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthetic Spectra and Light Curves of Type Ia Supernovae written by Markus Kromer and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Observational Analysis of the Late Light Curves of Normal Type Ia Supernovae written by Jessica Crist Lair and published by . This book was released on 2006 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Light Curves of Type Ia Supernovae and Preliminary Cosmological Constraints from the ESSENCE Survey written by Gautham Siddharth Narayan and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book From Twilight to Highlight The Physics of Supernovae written by W. Hillebrandt (Ed) and published by Springer Science & Business Media. This book was released on 2003-02-27 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supernovae, their bearing on cosmology and their connection to gamma-ray bursts are now at the center of astrophysical research programs. This volume deals with astronomical observations of supernovae and their relation to nuclear and particle astrophysics. All known aspects of supernovae explosions are investigated in articles specifically written for researchers and advanced graduate students. It also includes recent numerical "experiments" related to the question of hydrodynamical instability in two and three dimensions and to problems concerning the complexity of radiation transport in the models. Other contributions discuss the possible energy sources needed to drive these powerful stellar explosions.
Download or read book Thermonuclear Supernovae written by P. Ruiz-Lapuente and published by Springer Science & Business Media. This book was released on 1997 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt: All theoretical and observational topics relevant to the understanding of the thermonuclear (Type Ia) supernova phenomenon are thoroughly and consistently reviewed by a panel including the foremost experts in the field. The book covers all aspects, ranging from the observations of SNe Ia at all stages and all wavelengths to the 2D and 3D modelling of thermonuclear flames in very dense plasmas. Scenarios for close binary evolution leading to SNe Ia are discussed. Particular emphasis is placed on the homogeneity vs. diversity of SNe Ia and on their use as standard candles to measure cosmological parameters. The book reflects the recent and very significant progress made in both the modelling of the explosions and in the observational field.
Download or read book The Physics of Type Ia Supernova Light Curves II Opacity and Diffusion written by and published by . This book was released on 2000 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: We examine the nature of the opacity and radiation transport in Type Ia supernova. The dominant opacity arises from line transitions. We discuss the nature of line opacities and diffusion in expanding media and the appropriateness of various mean and expansion opacities used in light curve calculations. Fluorescence is shown to to be the dominant physical process governing the rate at which energy escapes the supernova. A sample lightcurve is presented obtained by a time-dependent solution of the radiative transport equation with a spectral resolution of 80 km s
Download or read book Parameter Sensitivity of Synthetic Spectra and Light Curves of Type Ia Supernovae written by Ernst Rolf Lexen and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lightcurves of Type Ia Supernovae from Near the Time of Explosion written by and published by . This book was released on 2006 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a set of 11 type Ia supernova (SN Ia) lightcurves with dense, pre-maximum sampling. These supernovae (SNe), in galaxies behind the Large Magellanic Cloud (LMC), were discovered by the SuperMACHO survey. The SNe span a redshift range of z = 0.11-0.35. Our lightcurves contain some of the earliest pre-maximum observations of SNe Ia to date. We also give a functional model that describes the SN Ia lightcurve shape (in our V R-band). Our function uses the ''expanding fireball'' model of Goldhaber et al. (1998) to describe the rising lightcurve immediately after explosion but constrains it to smoothly join the remainder of the lightcurve. We fit this model to a composite observed V R-band lightcurve of three SNe between redshifts of 0.135 to 0.165. These SNe have not been K-corrected or adjusted to account for reddening. In this redshift range, the observed V R-band most closely matches the rest frame V-band. Using the best fit to our functional description of the lightcurve, we find the time between explosion and observed V R-band maximum to be 19.2 ± 1.3-1.6 ± 0.07(red.) rest-frame days for a SN Ia with a V R-band [Delta]m10 of 0.52. For the redshifts sampled, the observed V R-band time-of-maximum brightness should be the same as the rest-frame V -band maximum to within 1.1 rest-frame days.
Download or read book Infrared Study of Type Ia Supernovae written by Emma Jane Claire Bowers and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Light on Dark Matter written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Under this proposal, we have been undertaking a calibration of rate of change of the expansion rate of the Universe as a function of cosmic look-back time using the high-precision standard candles, Type Ia supernovae, as observed in their rest-frame near-infrared wavelengths. The apparent acceleration of the Universe, as discovered earlier using these same types of supernovae, was both unanticipated and extremely profound in its implications. Not only does the acceleration mean that the Universe is unbound, but it also implies the existence of a new constituent of the Universe (so-called 'dark energy') that is many orders of magnitude stronger than what physicists can easily accommodate in their standard theories of particle physics. A result with such wide-ranging and important implications must be checked, and all sources of systematic error and uncertainty must be evaluated and accounted for. At increasingly higher redshifts the objects being observed are seen at earlier cosmic times and the radiation that reaches Earth is shifted to longer and longer wavelengths. What leaves a supernova event at one time in the past as an optical photon is downgraded by cosmic expansion into a red or infrared photon by the time it is detected here. Optical images of distant supernovae seen now, began their lives as ultraviolet photons. The ultraviolet properties of nearby supernovae are not well understood, so comparing supernova across time and space becomes complicated and uncertain. Moreover it is well known that the systematic effects of interstellar dust are larger and more variable from place to place in the ultraviolet than they are at longer wavelengths. To mitigate both the uncertainty of the ultraviolet calibration and the certainty of variable dust extinction along the line of sight, the Carnegie Supernova Program (CSP) has been observing the distant supernovae at groundbased infrared wavelengths that more closely match restframe (emitted) optical wavelengths at the supernova event itself. Not only does this allow us to compare local (calibrating) supernovae with distant supernovae without the uncertainty of shifting between uncertain physical regimes, but it also actively reduces both the impact and the uncertainty of interstellar dust on the apparent magnitudes of the tagert supernovae and their calibrators. Infrared radiation penetrates dust and gas much more efficiently than optical and ultraviolet photons. This has been possible because Carnegie operates very large-aperture telescopes at the Las Campanas Observatory in Chile, equipped with state-of-the-art, wide-field near-infrared detectors capable of detecting and measuring distant supernovae (discovered by collaborating surveys) early in their evolution. With support from the DOE through this grant the Carnegie Supernova Project has observed 70 Type Ia supernovae from Chile obtaining near-infrared light curves which, when combined with the discovery images provide high-quality data on the rest-frame, near-infrared magnitudes of these supernovae at the time of maximum light. The peak luminosity of Type Ia supernovae can then be used to estimate their distances (once corrected for decline rate and residual reddening effects). Those distances when compared to their expansion velocities give us the systematic departures from pure Hubble expansion that lie at the heart of the detection of dark energy in the Universe. A paper summarizing the techniques and methods used by the CSP in measuring high-redshift supernovae is in the final stages of circulating amongst the team members. We expect to submit it to the Astrophysical Journal before the end of 2008. Half of the data on the full sample observed supernovae has been fully reduced for this paper. We already have a new measurement of the dark energy contribution to cosmic acceleration. We find a value of w = -1.05 ± 0.08 (statistical) ± 0.08 (systematic). This value is consistent with, but completely independent of and has a smaller systematic uncertainty than, other studies to date.
Download or read book Type Ia supernovae written by Aleksej M. Chochlov and published by . This book was released on 1991 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Timescale Stretch Parameterization of Type Ia Supernova B band Light Curves written by and published by . This book was released on 2001 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: R-band intensity measurements along the light curve of Type Ia supernovae discovered by the Cosmology Project (SCP) are fitted in brightness to templates allowing a free parameter the time-axis width factor w identically equal to s times (1+z). The data points are then individually aligned in the time-axis, normalized and K-corrected back to the rest frame, after which the nearly 1300 normalized intensity measurements are found to lie on a well-determined common rest-frame B-band curve which we call the ''composite curve.'' The same procedure is applied to 18 low-redshift Calan/Tololo SNe with Z
Download or read book The Peculiar SN 2005hk written by and published by . This book was released on 2006 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present extensive u(prime)g(prime)r(prime)i(prime) BV RIY JHK{sub s} photometry and optical spectroscopy of SN 2005hk. These data reveal that SN 2005hk was nearly identical in its observed properties to SN 2002cx, which has been called 'the most peculiar known type Ia supernova'. Both supernovae exhibited high ionization SN 1991T-like pre-maximum spectra, yet low peak luminosities like SN 1991bg. The spectra reveal that SN 2005hk, like SN 2002cx, exhibited expansion velocities that were roughly half those of typical type Ia supernovae. The R and I light curves of both supernovae were also peculiar in not displaying the secondary maximum observed for normal type Ia supernovae. Our Y JH photometry of SN 2005hk reveals the same peculiarity in the near-infrared. By combining our optical and near-infrared photometry of SN 2005hk with published ultraviolet light curves obtained with the Swift satellite, we are able to construct a bolometric light curve from (almost equal to) 10 days before to (almost equal to)60 days after B maximum. The shape and unusually low peak luminosity of this light curve, plus the low expansion velocities and absence of a secondary maximum at red and near-infrared wavelengths, are all in reasonable agreement with model calculations of a 3D deflagration which produces (almost equal to) 0.25 M{sub {circle_dot}} of 56Ni.
