Ultraviolet photometry from the orbiting astronomical observatory. XXV - Diffuse galactic light in the 1500-4200 A region and the scattering properties of interstellar dust grains
1976; IOP Publishing; Volume: 208; Linguagem: Inglês
10.1086/154582
ISSN1538-4357
AutoresCharles F. Lillie, Adolf N. Witt,
Tópico(s)Photocathodes and Microchannel Plates
Resumoview Abstract Citations (229) References (35) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Ultraviolet photometry from the Orbiting Astronomical Observatory. XXV. Diffuse galactic light in the 1500 - 4200 Ã… region and the scattering properties of interstellar dust grains. Lillie, C. F. ; Witt, A. N. Abstract New measurements of the ultraviolet surface brightness of the night sky in 71 fields in the galactic longitude range 650 < 111 < 1450 are presented. The data were obtained with the Orbiting Astronomical Observatory (OAO-2) at nine wavelengths between 1500 A and 4200 A and have been corrected for the contributions due to zodiacal light and integrated starlight. The residual brightnesses were analyzed with radiative transfer models for the diffuse galactic light which incorporate a z-dependent source function. The results qualitatively confirm earlier findings for this wavelength region, yielding a wavelength dependent albedo of the interstellar grains of approximately a = 0.7 + 0.1 longward of A3000, a = 0.35 + 0.05 around the pronounced minimum near A2200, and a = 0.6 + 0.05 at Al 550. The true absorption nature of the bump in the interstellar extinction curve near A2200, as well as the increase of the albedo shortward of A2000 are thus reconfirmed. The phase function asymmetry factor is found to lie between g = 0.6 and g = 0.9 for the entire wavelength range, indicating the interstellar grains are strongly forward scattering. Subject heading: interstellar: matter Publication: The Astrophysical Journal Pub Date: August 1976 DOI: 10.1086/154582 Bibcode: 1976ApJ...208...64L Keywords: Cosmic Dust; Light Scattering; Oao 2; Sky Brightness; Ultraviolet Photometry; Albedo; Astronomical Models; Diffuse Radiation; Galactic Radiation; Interstellar Extinction; Night Sky; Radiative Transfer; Astrophysics full text sources ADS | 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 25: 1979ApJ...228...95C 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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