========================================================================== J/ApJ/703/L72 Hipparcos calibration of the TRGB (Tabur+, 2009) The following files can be converted to FITS (extension .fit or fit.gz) 2mass.dat dirbe.dat ========================================================================== Query from: http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=J/ApJ/703/L72 ==========================================================================
drwxr-xr-x 27 cats archive 4096 Jan 29 2012 [Up] drwxr-xr-x 2 cats archive 4096 May 12 10:01 [TAR file] -rw-r--r-- 1 cats archive 470 Dec 9 2009 .message -r--r--r-- 1 cats archive 4358 Dec 9 2009 ReadMe -r--r--r-- 1 cats archive 2927255 Sep 21 2009 2mass.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -rw-r--r-- 1 cats archive 1994 Dec 9 2009 +footg5.gif -rw-r--r-- 1 cats archive 39717 Dec 9 2009 +footg8.gif -r--r--r-- 1 cats archive 125098 Sep 21 2009 dirbe.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : J/ApJ/703/L72 Hipparcos calibration of the TRGB (Tabur+, 2009) ================================================================================ Hipparcos calibration of the tip of the red giant branch. Tabur V., Kiss L.L., Bedding T.R. <Astrophys. J. 703, L72-L75 (2009)> =2009ApJ...703L..72T ================================================================================ ADC_Keywords: Parallaxes, trigonometric; Photometry, infrared Keywords: stars: AGB and post-AGB - stars: late-type - stars: variables: other - solar neighborhood - distance scale Abstract: We have detected the tip of the red giant branch (TRGB) in the solar neighborhood using near-infrared photometry from the Two Micron All Sky Survey (II/246) and DIRBE (J/ApJS/154/673) catalogs, and revised Hipparcos parallaxes. We confirm that the revised Hipparcos parallaxes are superior to the original ones, and that this improvement is necessary to detect the TRGB. We find a tip absolute magnitude of M_K_=-6.85+/-0.03, in agreement with that expected from previous tip measurements of the Large Magellanic Cloud, Small Magellanic Cloud, and Bulge. This represents the first geometric calibration of the TRGB and extends previous calibrations, based on metal-poor globular clusters, to solar metallicities. We attempted to use the TRGB to confirm the presence of the Lutz-Kelker bias, with inconclusive results. Attempts to detect the tip in the I band also produced inconsistent results, due to a lack of precise, homogeneous photometry for these bright stars. Description: These files contain stars selected from the revised Hipparcos catalog with relative parallax uncertainties less than 25%, cross-matched with near infrared photometry from the 2MASS and DIRBE catalogs.