Variations in the Stellar Luminosity Function.

Abstract

view Abstract Citations (13) References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Variations in the Stellar Luminosity Function. McCuskey, I. S. W. ; Seyfert, C. K. Abstract Two regions of the Milky Way, LF1 in Aquila and LF2 in Cygnus, have been studied by means of data on spectra and colors of stars to mpg = 12.5. The work is the first part of a broad program for study of fluctuations in the stellar luminosity function near the galactic plane. By means of red color excesses, E~, and a ratio 2.6 for total photographic absorption to color excess, the interstellar absorption at 2000 parsecs is found to be 1.7 mag. in LF1 and 1.0 mag in LF2. Space densities, corrected for absorption, for various spectral groups are shown in Figure 5. These have been used to compute a luminosity fimction in each region at distances of 100, 200, 400, and 600 parsecs (see Tables 15 and 16). The fluctuation in the form of this function is shown in Figures 8 and 10. The principal departures from the standard Van Rhijn luminosity function, at 100 parsecs, are an excess of 0.3 in log co(M) for -2 <M < +1 in both regions, and a deficiency of about the same amount for +2 <M < +4. INTRODUCTIO Publication: The Astrophysical Journal Pub Date: July 1947 DOI: 10.1086/144936 Bibcode: 1947ApJ...106....1M full text sources ADS | data products SIMBAD (12) Related Materials (8) Part 1: 1947AJ.....52..155M Part 3: 1949ApJ...109..139M Part 4: 1949ApJ...109..414M Part 5: 1951ApJ...113..672M Part 6: 1952ApJ...115..479M Part 7: 1954ApJ...120..139M Part 8: 1955ApJ...121..643F Part 9: 1956ApJ...123..458M