منابع مشابه
A Cepheid Distance to Ngc 4603 in Centaurus
In an attempt to use Cepheid variables to determine the distance to the Centaurus cluster, we have obtained images of NGC 4603 with the Hubble Space Telescope for 9 epochs (totalling 24 orbits) over 14 months in the F555W filter and 2 epochs (totalling 6 orbits) in the F814W filter. This galaxy has been suggested to lie within the “Cen30” portion of the Centaurus cluster, which is concentrated ...
متن کاملA Revised Cepheid Distance to Ngc 4258 and a Test of the Distance Scale
In a previous paper (Maoz et al. 1999), we reported a Hubble Space Telescope (HST) Cepheid distance to the galaxy NGC 4258 obtained using the calibrations and methods then standard for the Key Project on the Extragalactic Distance Scale. Here, we reevaluate the Cepheid distance using the revised Key Project procedures described in Freedman et al. (2001). These revisions alter the zero points an...
متن کاملThe distance to the LMC cluster NGC 1866 ; clues from the cluster Cepheid population
Recent investigations aimed at estimating the distance to the young LMC cluster NGC 1866 have made use of Red Clump stars in the surrounding LMC field, together with empirical and theoretical Main-Sequence fitting methods, and have found significantly different distances for the field and the cluster, the latter being closer by in distance modulus by ∆(DM)∼0.20 mag. In this paper we (re-)consid...
متن کاملThe Cepheid Period - Luminosity relation and the maser distance to NGC 4258
In a recent paper describing HST observations of Cepheids in the spiral galaxy NGC 4258, Newman et al. (2001) report that the revised calibrations and methods for the Key Project on the Extragalactic Distance Scale yield that the true distance modulus of this galaxy is μ0,4258 = 29.40±0.09 mag, corresponding to a metric distance of 7.6±0.3 Mpc. This Cepheid distance, which holds for 18.50 mag a...
متن کاملProject . An improved distance to the Sculptor spiral galaxy NGC 300 from its Cepheid variables
In a previous paper, we reported on the discovery of more than a hundred new Cepheid variables in the Sculptor Group spiral NGC 300 from wide-field images taken in the B and V photometric bands at ESO/La Silla. In this paper, we present additional VI data, derive improved periods and mean magnitudes for the variables, and construct period-luminosity relations in the V, I and the reddening-indep...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 2000
ISSN: 0252-9211
DOI: 10.1017/s0252921100057602