Ultraviolet photometry from the Orbiting Astronomical Observatory. XXVI - Energy distributions of seven early-type galaxies and the central bulge of M31
1979; IOP Publishing; Volume: 228; Linguagem: Inglês
10.1086/156825
ISSN1538-4357
Autores Tópico(s)Astronomy and Astrophysical Research
Resumoview Abstract Citations (164) References (31) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Ultraviolet photometry from the Orbiting Astronomical Observatory. XXVI. Energy distributions of seven early-type galaxies and the central bulge of M31. Code, A. D. ; Welch, G. A. Abstract Medium-broad-band photometry is presented for the integrated light of seven elliptical and 50 galaxies and the central bulge of M31 in terms of flux per unit wavelength interval received at the top of the atmosphere. The observations cover the region 1 A. The energy distribution of the Fornax dwarf galaxy is quite similar to that of the Galactic globular clusters having richly populated blue horizontal branches. The ultraviolet energy of the M3 1 bulge could arise from either the blue horizontal branch of an evolved population or from a young upper main sequence. Stars of the latter type, if present, might be detectable in ground-based ultraviolet photographs. Large scatter is found among the ultraviolet energy distributions of early-type galaxies. While most appear to decline monotonically, there are some cases where an increase in energy is observed at the shortest wavelengths. We examine implications of this scatter for the computation of realistic K-corrections to photometry of very distant elliptical galaxies. At the present epoch most early-type galaxies are much fainter at ultraviolet wavelengths than a typical late-type spiral galaxy. Since both galaxy types are found in at least some rich galaxy clusters, it may be (neglecting evolution) that at large redshifts a spiral galaxy will be observed as the brightest cluster member. Great caution must therefore be exercised in extending the redshift-magnitude diagram to large distances. Subject headings: cosmology - galaxies: individual - galaxies: photometry - ultraviolet: general Publication: The Astrophysical Journal Pub Date: February 1979 DOI: 10.1086/156825 Bibcode: 1979ApJ...228...95C Keywords: Andromeda Galaxy; Cosmology; Galactic Bulge; Galactic Radiation; Oao; Spaceborne Astronomy; Spectral Energy Distribution; Ultraviolet Photometry; Elliptical Galaxies; Galactic Structure; Spiral Galaxies; Astrophysics; Andromeda Nebula:Nucleus; Early-Type Galaxies:UV Photometry; Elliptical Galaxies:Energy Distribution full text sources ADS | data products NED (8) SIMBAD (1) Related Materials (37) Part 1: 1970ApJ...161..377C Part 2: 1972ApJ...171..293B Part 3: 1972ApJ...172..755W Part 4: 1972ApJ...178..727D Part 5: 1972ApJ...178..189B Part 6: 1972ApJ...178..495D Part 7: 1973ApJ...179..527M Part 8: 1973ApJ...185..577L Part 9: 1973ApJ...185..921E Part 10: 1974ApJ...189..303G Part 11: 1974ApJ...187..521D Part 12: 1973ApJ...186..939H Part 13: 1974ApJ...187..197S Part 14: 1974ApJ...187..243J Part 15: 1974ApJ...190..319L Part 16: 1974ApJ...191..659S Part 17: 1975ApJ...195..121D Part 18: 1975ApJ...197..379E Part 19: 1975ApJ...199...92S Part 20: 1976ApJ...203..410B Part 21: 1976Ap&SS..41..121K Part 22: 1976ApJ...206..167P Part 23: 1976ApJ...208..135L Part 24: 1976ApJ...208...64L Part 26: 1977ApJ...211..207H Part 27: 1978ApJ...219..947L Part 28: 1978ApJ...222..909W Part 29: 1978ApJ...220..582E Part 30: 1979ApJS...39..195C Part 31: 1979ApJ...229..994G Part 32: 1980ApJS...43..501C Part 33: 1979ApJ...228..419W Part 34: 1980ApJ...236..798W Part 35: 1980ApJS...42..283M Part 36: 1984ApJ...281..774C Part 37: 1982ApJ...256....1C Part 38: 1982AJ.....87..849D
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