The Araucaria project – improving stellar distance indicators
نویسندگان
چکیده
منابع مشابه
The Optical Gravitational Lensing Experiment. Stellar Distance Indicators in the Magellanic Clouds and Constraints on the Magellanic Cloud Distance Scale
BVI photometry of the Magellanic Clouds collected during the OGLE-II microlensing experiment makes it possible to study in detail photometric properties of the ”major” stellar distance indicators in the Magellanic Clouds. In addition to Cepheids, RR Lyr and red clump stars, which photometry was presented in the earlier OGLE papers, we present the so far most accurate determination of brightness...
متن کاملThe Edge of the Milky Way Stellar Disk Revealed Using Clump Giant Stars as Distance Indicators
We use the clump giants of the disk as standard candles calibrated from Hipparcos parallaxes in order to map their distribution with two new near-IR surveys of the Galactic plane: UKIDSS-GPS and VVV. We explore different selection cuts of clump giants. We conclude that there is an edge of the stellar disk of the Milky Way at R = 13.9±0.5 kpc along various lines of sight across the galaxy. The e...
متن کاملThe Araucaria Project: the Effect of Blending on the Cepheid Distance to Ngc 300 from Advanced Camera for Surveys Images1
We have used the Advanced Camera for Surveys aboard the Hubble Space Telescope to obtain F435W , F555W and F814W single-epoch images of six fields in the spiral galaxy NGC 300. Taking advantage of the superb spatial resolution of these images, we have tested the effect that blending of the Cepheid variables studied from the ground with close stellar neighbors, unresolved on the ground-based ima...
متن کاملThe ARAUCARIA project: Deep near-infrared survey of nearby galaxies. I. The distance to the Large Magellanic Cloud from
The ARAUCARIA project: Deep near-infrared survey of nearby galaxies. I. The distance to the Large Magellanic Cloud from K-band photometry of red clump stars ABSTRACT We have obtained deep imaging in the near-infrared J and K bands for 2 nearby fields in the bar of the LMC with the ESO NTT telescope, under exquisite seeing conditions. The K, J-K color-magnitude diagrams constructed from these da...
متن کاملThe Araucaria Project: The Local Group Galaxy WLM - Distance and Metallicity from Quantitative Spectroscopy of Blue Supergiants
The quantitative analysis of low resolution spectra of A and B supergiants is used to determine a distance modulus of 24.99± 0.10 mag (995± 46 Kpc) Based on VLT observations for ESO Large Programme 171.D-0004.
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 2004
ISSN: 0252-9211
DOI: 10.1017/s0252921100010393