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Поисковые слова: asteroid
The use of IRAS data to define H II regions [ CATS home ] [ Back to CATS list ] PNs [ ftp ]

HII [ ftp ]

1989AJ.....97..786Hughes & MacLeod

See also Creteria
ADS Astronomy Abstract Service 

 Title:              The use of IRAS data to define H II regions
 Authors:            HUGHES, V. A.; MACLEOD, G. C.
 Affiliation:        AB(Queen's University, Kingston, Canada)
 Journal:            Astronomical Journal (ISSN 0004-6256), vol. 97, March
                     1989, p. 786-800.
 Publication Date:   3/1989
 Category:           Astrophysics
 Origin:             STI
 NASA/STI Keywords:  H II REGIONS, INFRARED ASTRONOMY SATELLITE, MOLECULAR
                     CLOUDS, PLANETARY NEBULAE, FLUX DENSITY, HYDROGEN,
                     RADIO OBSERVATION, STAR FORMATION, VERY LARGE ARRAY
                     (VLA)
 Bibliographic Code: 1989AJ.....97..786H

Abstract

A total of 2298 IR H II regions in the IRAS Point Source Catalog are identified to a confidence level of 77 percent. A latitude-longitude plot shows that most of these regions lie in the region + or - 3 degrees of the galactic plane. A set of 949 IRAS sources are shown to be planetary nebulae to a 79 percent confidence level. These sources are found within 10 degrees of the plane. Seven of the objects studied are observed with VLA as a test of the analysis.
created by S. Trushkin 1995

pn_iras.xy with row of X, Y values. pn_iras has the same format as iras point catalog. This is ***propable*** 991 PNs from IRAS PSC (v1.0).

Criteria by Hughes & McLeod (1989) of PN regions in IRAS catalog:

flux-quality numbers >= 1,2,3 at 12,25,60,100 mum

Y = log(S25/S12) >= 0.4

X = log(S60/S25) <= 0.25

-10 <= b <= +10