An Infrared Determination of the Reddening and Distance to Dwingeloo 1
Abstract
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‧x4.9‧, together with J and K_s imagingof the central 2.5‧x2.5‧. We used the small dispersion of the intrinsic infrared colors of spiral galaxies to determine an infrared H-band extinction of A_H = 0.47 +/- 0.11 mag toward Dw 1. Using infrared colorsreduces 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 modulusof (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.
- Publication:
-
The Astronomical Journal
- Pub Date:
- August 1999
- DOI:
- 10.1086/300986
- arXiv:
- arXiv:astro-ph/9905152
- Bibcode:
- 1999AJ....118..826I
- Keywords:
-
- GALAXIES: INDIVIDUAL: NAME: DWINGELOO 1;
- GALAXIES: DISTANCES AND REDSHIFTS;
- GALAXIES: PHOTOMETRY;
- INFRARED RADIATION;
- Astrophysics
- E-Print:
- 20 pages, 2 figures, see http://nicmos2.as.arizona.edu/~aalonso/Dw1/dw1_paper.html