QUANTIFYING SPECTRAL FEATURES OF TYPE Ia SUPERNOVAE

被引：10

作者：

Wagers, A. ^{[1
]}

Wang, L. ^{[1
]}

Asztalos, S. ^{[2
]}

机构：

[1] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA

[2] Xray Instrumentat Associates LLC, Hayward, CA 94551 USA

来源：

ASTROPHYSICAL JOURNAL | 2010年 / 711卷 / 02期

关键词：

dark energy; supernovae: general; LOW-LUMINOSITY HOST; SPECTROSCOPIC OBSERVATIONS; INFRARED OBSERVATIONS; OPTICAL SPECTROSCOPY; WAVELET TRANSFORM; MAXIMUM LIGHT; WHITE-DWARF; SN; 2005HK; PREMAXIMUM; DIVERSITY;

D O I：

10.1088/0004-637X/711/2/711

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We introduce a new technique to quantify highly structured spectra for which the definition of continua or spectral features in the observed flux spectra is difficult. The method employs wavelet transformations to decompose the observed spectra into different scales. A procedure is formulated to define the strength of spectral features so that the measured spectral indices are independent of the flux levels and are insensitive to the definition of continuum and also to reddening. This technique is applied to Type Ia supernovae (SNe) spectra, where correlations are revealed between luminosity and spectral features. The current technique may allow for luminosity corrections based on spectral features in the use of Type Ia SNe as cosmological probe.

引用

页码：711 / 730

页数：20

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