Valinhos 2.2 micron survey of the southern galactic plane. II - Near-IR photometry, IRAS identifications and nature of the sources

Details Valinhos 2.2 micron survey of the southern galactic plane. II - Near-IR photometry, IRAS identifications and nature of the sources Valinhos 2.2 micron survey of the southern galactic plane. II - Near-IR photometry, IRAS identifications and nature of the sources

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26as...71...39e&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 71, no. 1, Oct. 1987, p. 39-55. Research supported by the Fu

Astronomy and Astrophysics

Astronomy

88

Astronomical Photometry, Late Stars, Milky Way Galaxy, Near Infrared Radiation, Spaceborne Astronomy, Spectrum Analysis, Infrared Astronomy Satellite, Infrared Photometry, Point Sources, Radiant Flux Density, Spectral Energy Distribution, Stellar Envelopes

Scientific paper

This paper reports on broad band near-IR photometric observations of 630 objects found in the Valinhos 2.2 μm survey of the southern galactic plane. Ninety percent of them are identified with IRAS Point Sources. The near-IR and Infra Red Astronomical Satelllte (IRAS) fluxes, although not measured simultaneously, are combined to study the overall energy distributions of these objects. Most of them are typical of late-type stars surrounded by circumstellar dust shells (CDS). A classification of the objects based on three colour indices, namely, K - L, L- [12 μ m] and [12 μ m]- [25 μm] is defined in order to discriminate stars surrounded by CDSs of various physical properties as well as oxygen-rich against carbon-rich stars. Several interesting peculiar sources are briefly discussed and proposed for further multi-frequency observations.

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