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Astron. Astrophys. 333, 803-808 (1998)


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Dust properties of NGC 2076 *

D.K. Sahu 1, S.K. Pandey 1, 2 and Ajit Kembhavi 3

1 School of Studies in Physics, Pt. Ravishankar Shukla University, Raipur, 492 010, India
2 School Of Physical Sciences, SRTM University, Nanded, 431 602, India
3 IUCAA, Post Bag 4, Ganeshkhind, Pune, 411 007, India

Received 10 September 1997 / Accepted 27 January 1998

Abstract

We present multiband CCD surface photometry of NGC 2076, an early-type galaxy with a broad dust lane. We investigate the wavelength dependence of the dust extinction and derive the apparent extinction law. The extinction varies linearly with inverse wavelength with a ratio of total to selective extinction [FORMULA] = 2.70 [FORMULA] 0.28. The smaller value of [FORMULA] relative to the Galactic value implies that the size of `large' dust grains, responsible for extinction, is smaller than that in our Galaxy. We calculate the dust mass from total extinction, as well as from the color excess. We use IRAS data on FIR emission to determine the dust temperature, star formation rate and star formation efficiency.

Key words: galaxies: individual: NGC 2076 – dust, extinction – galaxies: elliptical and lenticular, cD – galaxies: ISM – galaxies: photometry

* Based on observations taken from VBO, Kavalur, India

© European Southern Observatory (ESO) 1998

Online publication: April 28, 1998

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