An infrared determination of the reddening and distance to dwingeloo 1

Valentin D. Ivanov, Almudena Alonso-Herrero, Marcia J. Rieke, Don McCarthy

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


We present the first published infrared observations of the nearby, highly obscured galaxy Dwingeloo 1 (Dw 1), including deep H-band imaging covering a total of 4′.9 × 4′.9, together with J and Ks imaging of the central 2′.5 × 2′.5. We used the small dispersion of the intrinsic infrared colors of spiral galaxies to determine an infrared H-band extinction of AH = 0.47 ± 0.11 mag toward Dw 1. Using infrared colors reduces the uncertainties in the reddening and distance by a factor of 3. The H-band magnitude, corrected for extinction, and the infrared Tully-Fisher relation are then used to estimate a distance modulus of (m - M)0 = 28.62 ± 0.27 and, thus, a distance of d = 5.3+0.7-0.6 Mpc, which places Dw 1 at the far end of the IC 342/Maffei 1-2 group of galaxies. Our result is largely independent of the nature of the reddening law because we estimated both the reddening and the distance at the same wavelength range.

Original languageEnglish (US)
Pages (from-to)826-830
Number of pages5
JournalAstronomical Journal
Issue number2
StatePublished - Aug 1999


  • Galaxies: distances and redshifts
  • Galaxies: individual (Dwingeloo 1)
  • Galaxies: photometry
  • Infrared radiation

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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