期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 328, 期 1, 页码 L1-L4出版社
BLACKWELL SCIENCE LTD
DOI: 10.1046/j.1365-8711.2001.05005.x
关键词
supernovae : individual : SN 1998aq; Cepheids; galaxies : distances and redshifts; galaxies : individual : NGC 3982; distance scale
The distance to NGC 3982, host galaxy to the Type Ia supernova SN 1998aq, is derived using 32 Cepheids discovered in archival multi-epoch Hubble Space Telescope observations. Employing recent Large Magellanic Cloud Cepheid period-luminosity relations and absolute zero-point, we find a distance to NGC 3982 of 20.5 +/- 0.8 (r) +/- 1.7 (s) Mpc, including both random (r) and systematic (s) uncertainties, and ignoring any metallicity dependence in the Cepheid period-luminosity relation. Still unpublished light curve photometry promises to make SN 1998aq one of the most important calibrators for the Type Ia supernova decline rate-peak luminosity relationship.
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