J/A+A/564/A116 HI supershells catalogue (Suad+, 2014)
A new catalogue of HI supershell candidates in the outer part of the Galaxy.
Suad L.A., Caiafa C.F., Arnal E.M., Cichowolski S.
<Astron. Astrophys. 564, A116 (2014)>
=2014A&A...564A.116S 2014A&A...564A.116S
ADC_Keywords: Interstellar medium ; H I data ; Radial velocities ; Morphology
Keywords: ISM: bubbles - ISM: structure - methods: data analysis -
techniques: image processing - radio lines: ISM
Abstract:
The HI supershells catalogue was carried out making use of the
Leiden-Argentine-Bonn (LAB) HI survey in the outer part of the Galaxy.
The identification of the supershell candidates was made using a
combination of two techniques: a visual inspection one plus an
automatic searching algorithm. A total of 566 supershell candidates
were identified. Most of them (347) are located in the second galactic
quadrant, while 219 were found in the third one.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 105 566 Catalogue of Galactic HI supershells
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [GS]
3- 12 A10 --- GS Name of the shell (lll+bb+vvv)
13 A1 --- n_GS [*] *: this structure is a galactic chimney
candidate
17- 21 F5.1 deg GLONe Galactic longitude of the center of ellipse (1)
25- 29 F5.1 deg GLATe Galactic latitude of the center of ellipse (1)
33- 38 F6.1 km/s v0 Systemic radial velocity of the supershell (2)
41- 44 F4.1 kpc d Heliocentric distance of the supershell (3)
49- 53 F5.1 deg GLON0 Galactic longitude of the local minimum
57- 61 F5.1 deg GLAT0 Galactic latitude of the local minimum
65- 68 F4.1 deg a Major semi-axis of the fitted ellipse (4)
73- 76 F4.1 deg b Minor semi-axis of the fitted ellipse (4)
81- 86 F6.1 deg phi Major axis inclination φ relative to the
galactic plane, measured counterclockwise
form the galactic plane (5)
89- 92 I4 pc Reff Effective radius of the supershell (6)
97-100 F4.1 km/s Dv Velocity extension Δv of the supershell (7)
105 I1 --- N [1/4] Total number of full quadrants (8)
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Note (1): The uncertainty in the values estimated for the centroid of the
ellipses is about ±0.2°.
Note (2): The uncertainty of this velocity is equal to the velocity
resolution of the data (1.3km/s).
Note (3): The mean weight distance error for all the sample is about 21%.
Note (4): The uncertainties in the semi-axes are about 10%.
Note (5): See the paper for uncertainties in φ.
Note (6): The effective radius is the geometrical mean of the semi-major axes
(Reff=sqrt(a*b). The uncertainties in these values come from the
uncertainties in the distances and angular semi-axes, and are around 16%.
Note (7): The uncertainty is about 2.6km/s.
Note (8): each structure has been divided, from the center of the fitted
ellipse, in four quadrants, we counted the number of quadrants that
present HI, emission related to the wall of the structure (full quadrants).
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Acknowledgements:
Laura Andrea Suad, lasuad(at)iar.unlp.edu.ar
(End) Patricia Vannier [CDS] 25-Feb-2014