Planetary nebula candidates in a southern region of M 33
نویسندگان
چکیده
منابع مشابه
Spectroscopy of planetary nebulae in M 33 ⋆
Spectroscopic observations of 48 emission-line objects of M 33 have been obtained with the multi-object, wide field, fibre spectrograph AF2/WYFFOS at the 4.2m WHT telescope (La Palma, Spain). Line intensities and logarithmic extinction, cβ, are presented for 42 objects. Their location in the Sabbadin & D’Odorico diagnostic diagram (Hα/[S ii] vs Hα/[N ii]) suggests that >70% of the candidates ar...
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Aims. Images obtained with the ESO VLT and FORS1 in [O ] 5007 on-and off-band, as well as r Gunn filters, are analyzed to search for planetary nebula (PN) candidates. Methods. In the continuum-subtracted [O ] 5007 on-band images, a large number of emission-line regions were detected. We describe the criteria employed for distinguishing PN candidates from compact HII regions. Results. The ...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2001
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20011036