HIPPARCOS calibration of the peak brightness of four SNe Ia and the value of H0

被引:0
|
作者
Lanoix, P [1 ]
机构
[1] Observ Lyon, CRAL, F-69230 St Genis Laval, France
[2] Univ Lyon 1, F-69622 Villeurbanne, France
关键词
supernovae : general; distance scale;
D O I
暂无
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
HIPPARCOS geometrical parallaxes allowed us to calibrate the Cepheid Period-Luminosity relation and to compute the true distance moduli of 17 galaxies. Among these 17 galaxies, we selected those which generated type Ia Supernovae (SNe Ia). We found NGC 5253, parent galaxy of 1895B and 1972E, IC 4182 and NGC 4536 parents of 1937C and 1981B, respectively. We used the available B-band photometry to determine the peak brightness of these four SNe Ia. We obtained [M-B(MAX)] = -19.65 +/- 0.09. Then, we built a sample of 57 SNe Ia in order to plot the Hubble diagram and determine its zero-point. Our result (ZP(B) = -3.16 +/- 0.10) is in agreement with other determinations and allows us to derive the following Hubble constant: H-0 = 50 +/- 3 (internal) km.s(-1).Mpc(-1).
引用
收藏
页码:421 / 427
页数:7
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