J/MNRAS/424/2442 Catalog of bubbles from Milky Way Project (Simpson+, 2012)
The Milky Way Project First Data Release: a bubblier Galactic disc.
Simpson R.J., Povich M.S., Kendrew S., Lintott C.J., Bressert E.,
Arvidsson K., Cyganowski C., Maddison S., Schawinski K., Sherman R.,
Smith A.M., Wolf-Chase G.
<Mon. Not. R. Astron. Soc., 424, 2442-2460 (2012)>
=2012MNRAS.424.2442S 2012MNRAS.424.2442S
ADC_Keywords: H II regions ; Infrared sources ; Interstellar medium ;
Molecular clouds
Keywords: stars: formation - dust, extinction - H II regions - infrared: ISM
Abstract:
We present a new catalogue of 5106 infrared bubbles created through
visual classification via the online citizen science website The Milky
Way Project. Bubbles in the new catalogue have been independently
measured b at least five individuals, producing consensus parameters
for their position, radius, thickness, eccentricity and position
angle. Citizen scientists - volunteers recruited online and taking
part in this research - have independently rediscovered the
locations of at least 86 percent of three widely used catalogues of
bubbles and HII regions whilst finding an order of magnitude
more objects. 29 per cent of the Milky Way Project catalogue bubbles
lie on the rim of a larger bubble, or have smaller bubbles located
within them, opening up the possibility of better statistical studies
of triggered star formation. Also outlined is the creation of a heat
map of star formation activity in the Galactic plane. This online
resource provides a crowd-sourced map of bubbles and arcs in the Milky
Way, and will enable better statistical analysis of Galactic star
formation sites.
Description:
Physical parameters for 5106 visually identified infrared bubbles,
located in Spitzer GLIMPSE/MIPSGAL data.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
mwplarge.dat 113 3744 Large-bubble catalogue (table2 of the paper)
mwpsmall.dat 59 1362 Small-bubble catalogue (table3 of the paper)
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See also:
J/ApJ/649/759 : Bubbles in the galactic disk (Churchwell+, 2006)
J/ApJ/670/428 : Bubbles in the galactic disk. II. (Churchwell+, 2007)
J/A+A/537/A1 : Infrared fluxes of HII regions and PNe (Anderson+, 2012)
J/AJ/139/1542 : A catalog of MIPSGAL disk and ring sources (Mizuno+, 2010)
Byte-by-byte Description of file: mwplarge.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [MWP]
4- 18 A15 --- MWP Catalog identification, 1GLLLll+Bbbbbb
20- 39 A20 --- ONames Other name(s) (Churchwell IDs) (G3)
41- 47 F7.3 deg GLON Galactic Longitude
49- 54 F6.3 deg GLAT [-1/1] Galactic Latitude
56- 61 F6.3 arcmin iXdiam [0.45/20.73] Inner X Diameter
63- 69 F7.3 arcmin iYdiam [0.45/18.89] Inner Y Diameter
71- 76 F6.3 arcmin oXdiam [0.63/30.57] Outer X Diameter
78- 82 F5.2 arcmin Reff [0.27/11.72] Effective Radius
84- 88 F5.2 arcmin Thick [0.18/15.81] Effective Thickness
90- 94 F5.3 --- Ecc [0/1] Eccentricity of ellipse
96- 98 I3 deg PA [0/180] Ellipse position Angle
(from vertical of Y axis)
100-103 F4.2 --- Hit [0/1] Hit rate (G1)
105-109 F5.3 arcmin Disp Dispersion on position
111-113 A3 --- Flag [12 ] Hierachy flags (G2)
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Byte-by-byte Description of file: mwpsmall.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [MWP]
4- 19 A16 --- MWP Catalog identification, 1GLLLll+BbbbbbS
21- 24 A4 --- ONames Other name(s) (Churchwell ID) (G3)
26- 32 F7.3 deg GLON Galactic Longitude
33- 38 F6.3 deg GLAT Galactic Latitude
39- 42 F4.2 arcmin Width [0.45/1.23] Bubble width
44- 47 F4.2 arcmin Height [0.45/1.20] Bubble height
49- 52 F4.2 arcmin Reff [0.32/0.85] Effective radius
54- 57 F4.2 --- Hit [0/1] Hit rate (G1)
59 I1 --- Flag [2]? Hierachy flags (G2)
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Global notes:
Note (G1): The bubble's "hit rate" is the ratio of the number of qualifying
bubbles drawn to the number of times the bubble was seen by users on
the MWP website. The hit rate gives a measure of consensus among users
that a bubble is present in the data.
Note (G2): Hierachy flags as follows:
1 = bubbles identified as having smaller bubbles on their rim
2 = bubbles located within a larger bubble
Note (G3): see Churchwell et al. 2006 (J/ApJ/649/759); 2007 (J/ApJ/670/428)
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Acknowledgements:
Robert Simpson, robert.simpson(at)astro.ox.ac.uk
(End) Robert Simpson [Oxford, UK], Patricia Vannier [CDS] 14-Nov-2012