Change search
ReferencesLink to record
Permanent link

Direct link
Near-Infrared K Corrections of Type Ia Supernovae and their Errors
Show others and affiliations
Number of Authors: 8
2014 (English)In: Publications of the Astronomical Society of the Pacific, ISSN 0004-6280, Vol. 126, no 938, 324-337 p.Article in journal (Refereed) Published
Abstract [en]

In this paper we use near-infrared (NIR) spectral observations of Type Ia supernovae (SNe Ia) to study the uncertainties inherent in NIR K corrections. To do so, 75 previously published NIR spectra of 33 SNe Ia are employed to determine K-correction uncertainties in the YJHK(s) passbands as a function of temporal phase and redshift. The resultant K corrections are then fed into an interpolation algorithm that provides mean K corrections as a function of temporal phase and robust estimates of the associated errors. These uncertainties are both statistical and intrinsic-i.e., due to the diversity of spectral features from object to object and must be included in the overall error budget of cosmological parameters constrained through the use of NIR observations of SNe Ia. Intrinsic variations are likely the dominant source of error for all four passbands at maximum light. Given the present data, the total Y-band K-correction uncertainties at maximum are smallest, amounting to +/- 0.04 mag at a redshift of z = 0.08. The J-band K-term errors are also reasonably small (+/- 0.06 mag), but intrinsic variations of spectral features and noise introduced by telluric corrections in the H-band currently limit its total K-correction errors at maximum to +/- 0.10 mag at z = 0.08. Finally, uncertainties in the K-s-band K terms at maximum amount to +/- 0.07 mag at this same redshift. These results are largely constrained by the small number of published NIR spectra of SNe Ia, which do not yet allow spectral templates to be constructed as a function of the light curve decline rate.

Place, publisher, year, edition, pages
2014. Vol. 126, no 938, 324-337 p.
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:su:diva-105243ISI: 000336193800002OAI: diva2:731484


Available from: 2014-07-01 Created: 2014-06-24 Last updated: 2014-07-01Bibliographically approved

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Goobar, Ariel
By organisation
Department of PhysicsThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
In the same journal
Publications of the Astronomical Society of the Pacific
Astronomy, Astrophysics and Cosmology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 21 hits
ReferencesLink to record
Permanent link

Direct link