Measurements of near- and far-infrared zodiacal dust emission

Abstract

view Abstract Citations (8) References (14) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Measurements of Near- and Far-Infrared Zodiacal Dust Emission Salama, A. ; Andreani, P. ; dall'Oglio, G. ; Debernardis, P. ; Masi, S. ; Melchiorri, B. ; Melchiorri, F. ; Moreno, G. ; Nisini, B. ; Shivanandan, K. Abstract The authors have results from an infrared sky survey experiment performed during a balloon flight on 30 July 1984. The experiment explored five wavelength bands centered at 11, 19, 50, 108, and 225 μm with spectral resolutions (Δλ/λ) 0.07, 0.02, 0.3, 0.4, and 0.3, respectively. The results show that the dust emission, as a function of the ecliptic longitude, follows the exponential law e|-mλ-λ⊙| with m = 0.025 (+0.027, -0.013) at 20 μm, in the range 10° < |λ-λ_sun;| < 90°. The decrease of the dust density (n) with increasing heliocentric distance is slower than r-1.3. The actual trend of n, however, depends critically on the radial variation of the temperature which, in turn, depends on the chemical composition of the grains. The spectrum of the dust emission confirms previous observations by IRAS and extends them towards larger wavelengths. Even though the data do not allow an unambiguous determination of the relative abundance of the different species of grains, they may be fitted by an appropriate mixture of graphite and silicates. Publication: The Astronomical Journal Pub Date: February 1987 DOI: 10.1086/114331 Bibcode: 1987AJ.....93..467S Keywords: Chemical Composition; Emission Spectra; Far Infrared Radiation; Near Infrared Radiation; Temperature Distribution; Zodiacal Dust; Balloon Sounding; Density Distribution; Radial Distribution; Sky Surveys (Astronomy); Spectral Resolution; Astronomy; ZODIACAL LIGHT full text sources ADS |