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 2017ARep...61.1015T
=2017AZh....94.1003T 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 (http://third.ucllnl.org/gps), 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 2004ApJS..154...10F) and MIPS (Rieke et al., 2004ApJS..154...25R 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:
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FileName Lrecl Records Explanations
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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
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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
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Bytes Format Units Label Explanations
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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)
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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.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 09-Mar-2018