Measurements of the millimeter-wave spectrum of interstellar dust emission

M. L. Fischer, A. Clapp, M. Devlin, Joshua Gundersen, A. E. Lange, P. M. Lubin, P. R. Meinhold, P. L. Richards, G. F. Smoot

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We report measurements of the differential brightness of interstellar dust emission near the Galactic plane and at high Galactic latitudes. The data were obtained as part of a program to measure anisotropy in the cosmic microwave background (CMB). The measurements were made with a 0°.5 beam size and a 1°.3 p-p sinusoidal chop, in broad bands (Δv/v ∼ 0.3) centered near frequencies of 6, 9, and 12 cm-1. A measurement made toward the Galactic plane, at longitude l = 23°7, is compared with the contrast observed in the 100 μm IRAS data. Assuming the dust emission has a brightness Iv ∝ VnBv(Td), where Bv is the Planck function, a best fit yields n = 1.6 ± 0.4, Td = 24 ± 5 K. In a region near the star μ Pegasi (μPEG l = 91°, b = -31°), the comparison of our data with the 100 μn IRAS data yields n = 1.4 ± 0.4, and Td = 18 ± 3 K. In a second region near the star γ Ursa Minoris (GUM 1 = 108°, b = 41°), an upper limit is placed on contrast in dust emission. This upper limit is consistent with the spectrum measured at μPEG and the IRAS 100 μm emission contrast at GUM, which is ∼8 times lower than μPEG.

Original languageEnglish (US)
Pages (from-to)226-230
Number of pages5
JournalAstrophysical Journal
Volume444
Issue number1
StatePublished - May 1 1995
Externally publishedYes

Fingerprint

wave spectrum
millimeter waves
Infrared Astronomy Satellite
dust
brightness
stars
longitude
anisotropy
broadband
microwaves

Keywords

  • Dust, extinction
  • ISM: general
  • Radio continuum: ISM

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Space and Planetary Science

Cite this

Fischer, M. L., Clapp, A., Devlin, M., Gundersen, J., Lange, A. E., Lubin, P. M., ... Smoot, G. F. (1995). Measurements of the millimeter-wave spectrum of interstellar dust emission. Astrophysical Journal, 444(1), 226-230.

Measurements of the millimeter-wave spectrum of interstellar dust emission. / Fischer, M. L.; Clapp, A.; Devlin, M.; Gundersen, Joshua; Lange, A. E.; Lubin, P. M.; Meinhold, P. R.; Richards, P. L.; Smoot, G. F.

In: Astrophysical Journal, Vol. 444, No. 1, 01.05.1995, p. 226-230.

Research output: Contribution to journalArticle

Fischer, ML, Clapp, A, Devlin, M, Gundersen, J, Lange, AE, Lubin, PM, Meinhold, PR, Richards, PL & Smoot, GF 1995, 'Measurements of the millimeter-wave spectrum of interstellar dust emission', Astrophysical Journal, vol. 444, no. 1, pp. 226-230.
Fischer ML, Clapp A, Devlin M, Gundersen J, Lange AE, Lubin PM et al. Measurements of the millimeter-wave spectrum of interstellar dust emission. Astrophysical Journal. 1995 May 1;444(1):226-230.
Fischer, M. L. ; Clapp, A. ; Devlin, M. ; Gundersen, Joshua ; Lange, A. E. ; Lubin, P. M. ; Meinhold, P. R. ; Richards, P. L. ; Smoot, G. F. / Measurements of the millimeter-wave spectrum of interstellar dust emission. In: Astrophysical Journal. 1995 ; Vol. 444, No. 1. pp. 226-230.
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