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28 March 2024
 
  » arxiv » astro-ph/0109436

 Article overview


New candidate planetary nebulae in M81
L. Magrini ; M. Perinotto ; R.L.M. Corradi ; A. Mampaso ;
Date 25 Sep 2001
Subject astro-ph
Affiliation Dipartimento di Astronomia e Scienza dello Spazio, Universita di Firenze - Italy, Isaac Newton Group of Telescopes - La Palma - Spain, Instituto de Astrofisica de Canarias - Tenerife - Spain
AbstractA 34 x 34 arcmin field centred on the spiral galaxy M81 has been searched for emission-line objects using the prime focus wide field camera (WFC) of the 2.54 m Isaac Newton Telescope (La Palma, Spain). A total of 171 candidate planetary nebulae (PNe) are found, 54 of which are in common with the ones detected by Jacoby et al. (1989). The behaviour of PNe excitation as a function of galactocentric distance is examined, and no significant variations are found. The PNe luminosity function is built for the disk and bulge of M81, separately. A distance modulus of 27.92+-0.23 mag is found for disk PNe, in good agreement with previous distance measurements for M81 (Jacoby et al. 1989; Huterer et al. 1995).
Source arXiv, astro-ph/0109436
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