A systematic study of IRAS selected proto-planetary nebula candidates. I - Selection of the sample and observations of the southern objects

Details A systematic study of IRAS selected proto-planetary nebula candidates. I - Selection of the sample and observations of the southern objects A systematic study of IRAS selected proto-planetary nebula candidates. I - Selection of the sample and observations of the southern objects

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26as..100..413h&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 100, no. 2, p. 413-430.

Astronomy and Astrophysics

Astronomy

42

Astronomical Photometry, Astronomical Spectroscopy, Infrared Astronomy Satellite, Infrared Stars, Planetary Nebulae, F Stars, G Stars, M Stars, Near Infrared Radiation

Scientific paper

This paper is the first of a series, in which we report an extensive study of a sample of 62 IRAS selected proto-planetary nebula candidates. In this paper we describe the selection of the sample. For the 42 southern sources in the sample we present the results of observations using optical and near-IR photometry, and optical spectroscopy. Out of the 42 sources, 26 are associated with an optical counterpart, 12 do not have an optical counterpart, and four sources have more than one possible optical counterpart. Spectroscopy is carried out for 18 sources. Spectral types are mainly M, G, and F. The photometric observations show that nearly all sources in the sample radiate the bulk of their energy in the IRAS IR. This implies that the sources are surrounded by a thick dust shell.

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