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51 records were found.

Based on both empirical data for nearby galaxies, and on computer simulations, we show that measuring the position of the tip of the first-ascent red-giant branch (TRGB) provides a means of obtaining the distances to nearby galaxies with a precision and accuracy comparable to using Cepheids and/or RR Lyrae variables.
Comment: Accepted for publication in ApJ, 28 pages using emulateapj.sty, version with higher resolution figures available at http://www.astro.lsa.umich.edu/~rab/publications.html
Comment: Accepted for publication in ApJ, 20 pages using emulateapj.sty, version with higher resolution figures available at http://www.astro.lsa.umich.edu/~rab/publications.html or at http://nedwww.ipac.caltech.edu/level5/Sept01/Bernstein3/frames.html
Comment: Accepted for publication in ApJ, 22 pages using emulateapj.sty, version with higher resolution figures available at http://www.astro.lsa.umich.edu/~rab/publications.html or at http://nedwww.ipac.caltech.edu/level5/Sep01/Bernstein2/frames.html
We investigate the number of physical companion galaxies for a sample of relatively isolated elliptical galaxies. The NASA/IPAC Extragalactic Database (NED) has been usedto reinvestigate the incidence of satellite galaxies for a sample of 34 elliptical galaxies, firstinvestigated by Bothun & Sullivan (1977) using a visual inspection of Palomar Sky Survey prints out to a projected search radius of 75 kpc. We have repeated their original investigation usingdata cataloged data in NED. Nine of these ellipticals appear to be members of galaxy clusters:the remaining sample of 25 galaxies reveals an average of +1.0 f 0.5 apparent companions per galaxy within a projected search radius of 75 kpc, in excess of two equal-area comparisonregions displaced by 150-300 kpc. This is nearly an order of magnitude larger than the +0.12+/- 0.42 compani...
We present color-magnitude diagrams and luminosity functions of stars in the nearby galaxy IC 10, based on VI CCD photometry acquired with the COSMIC prime-focus camera on the Palomer 5m telescope.
Comment: 4 pages, 3 figures included. Proceedings of "The Stellar content of Local Group Galaxies", Ed. R. Cannon, P. Whitelock
IRAS spatial observations of M33 are presented and compared to UV optical, and radio wavelength data. At 12, 25, 60, and 100 microns the emission appears as two bright spiral arms superposed on a diffuse disk, with localized sources at the position of the nucleus and the brightest H II region complexes. The global IR properties of M33 are characteristic of quiescent spirals. The 8-30 micron mid-IR global emission is about 20 percent of the far-IR emission, similar to the ratio of these fluxes found for the local ISM. The local IR excess of M33 is about 2-3 times larger than the excess derived for H II regions in the Galaxy. The radial distributions of the IR colors are flat or nearly flat, implying near-constant dust temperatures across the diffuse disk. The integrated F(IR)-to-radio continuum emission of M33 follows the relation seen ...
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