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J/AZh/94/1003        Infrared morphology of HII regions       (Topchieva+, 2017)

Infrared morphology of regions of ionized hydrogen. Topchieva A.P., Wiebe D.S., Kirsanova M.S., Krushinskii V.V. <Astron. Zh. 94, 1003 (2017)> =2017ARep...61.1015T =2017AZh....94.1003T (SIMBAD/NED BibCode)
ADC_Keywords: H II regions ; Morphology ; Infrared sources Abstract: A search for infrared ring nebulae associated with regions of ionized hydrogen has been carried out. The New GPS Very Large Array survey at 20 cm forms the basis of the search, together with observations obtained with the Spitzer Space Telescope at 8 and 24um and the Herschel Space Telescope at 70um. Objects having ring-like morphologies at 8um and displaying extended emission at 20cm were selected visually. Emission at 24um having the form of an inner ring or central peak is also observed in the selected objects. A catalog of 99 ring nebulae whose shapes at 8 and 70um are well approximated by ellipses has been compiled. The catalog contains 32 objects whose shapes are close to circular (eccentricities of the fitted ellipses at 8um no greater than 0.6, angular radius exceeding 20"). These objects are promising for comparisons with the results of one-dimensional hydrodynamical simulations of expanding regions of ionized hydrogen. Description: The 20-cm New GPS survey (, created using the MAGPIS database of radio images of regions with Galactic coordinates |bGal|<0.8° and 5°<lGal<48.5° (Helfand et al., 2006, Cat. J/AJ/131/2525), was used as the basis for this study. We identified sources of compact radio emission among the objects in this survey, toward which we carried out a visual search for ring nebulae at 8 and 24um using images obtained with the IRAC (Fazio et al., 2004ApJS..154...10F) and MIPS (Rieke et al., 2004ApJS..154...25R) cameras of the Spitzer Telescope. The resulting list contains objects having the appearance of rings at 8um, inside of which IR emission at 24um and radio emission at 20cm is observed. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 59 99 Results of elliptical fits for the shapes of objects in 8um images table2.dat 59 99 Results of elliptical fits for the shapes of objects in 70um images
See also: V/114 : MSX6C Infrared Point Source Catalog (Egan+ 2003) J/ApJS/91/347 : A 5-GHz VLA Survey of the Galactic Plane (Becker+ 1994) J/ApJ/649/759 : Bubbles in the galactic disk (Churchwell+, 2006) J/MNRAS/424/2442 : Catalog of bubbles from Milky Way Project (Simpson+, 2012) Byte-by-byte Description of file: table1.dat table2.dat
Bytes Format Units Label Explanations
1- 23 A23 --- Name Object name 25- 27 A3 --- Ref Reference (1) 29- 35 F7.3 deg GLON ? Galactic longitude (2) 37- 42 F6.3 deg GLAT ? Galactic latitude (2) 44- 46 I3 arcsec aaxis ? Semi-major axis (2) 48- 50 I3 arcsec baxis ? Semi-minor axis (2) 52- 55 F4.2 --- e ? Eccentricity (2) 57- 59 I3 deg PA ? Position angle (2)
Note (1): Objects were taken from the following references: 1 = Becker et al., 1994 (J/ApJS/91/347), GPSR5 in Simbad 2 = Simpson et al., 2012, Cat. J/MNRAS/424/2442, [SPK2012] in Simbad 3 = Churchwell et al., 2006, Cat. J/ApJ/649/759, [CPA2006] in Simbad 4 = new objects 5 = Urquhart et al., 2009, Cat. J/A+A/507/795, [UHL2009] in Simbad 6 = Egan et al., MSX6C Infrared Point Source Catalog, Cat. V/114 Note (2): No value when fitting is not possible for that object.
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 09-Mar-2018
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