Galaxy: centerGalaxy: structureThe distance to the Galactic center inferred from OGLE RR Lyrae variables observed in the direction of the bulge is Ro=8.1+-0.6 kpc. An accurate determination of Ro is hindered by countless effects that include an ambiguous extinction law, a bias for smaller ...
Cepheids are key to establishing the cosmic distance scale. Therefore it’s important to assess the viability of QZ Nor, V340 Nor, and GU Nor as calibrators for Leavitt’s law via their purported membership in the open cluster NGC 6067. The following suite of evidence confirms that QZ Nor ...
Here we discuss impacts of distance determinations on the Galactic disk traced by relatively young objects. The Galactic disk,in diameter, is a cross-road of studies on the methods of measuring distances, interstellar extinction, evolution of galaxies, and other subjects of interest in astronomy. A...
Assuming that these contours mainly are populated by red clump giants and that the solar distance from the Galactic Center is 8.5 kpc the shift locates these stars at 13-14 kpc, so maybe we have a direct measure of the Milky Way radius. Based on observations ESO, La Silla}...
Accurate astronomical distance determination is crucial for all fields in astrophysics, from Galactic to cosmological scales. Despite, or perhaps because of, significant efforts to determine accurate distances, using a wide range of methods, tracers, and techniques, an internally consistent astronomical di...
By modeling the distribution ofGalactocentric latitudes forGCs, we have determined the half-angle of the cone of avoidance α 0 = 15. 0 4. 1 +2. 1 and the distance to the Galactic center R 0 = 7.3 ± 0.5 kpc (in the scale of the Harris (1996) catalog, the 2010 version) as ...
Galaxy (Milky Way)The influence of various factors on the statistical properties of the Galactic center distance ( R 0 ) estimate obtained by solving the general problem of determining the geometric parameters of a Galactic spiral arm from its segment with the inclusion of the distance to the ...