J/A+A/437/101 HI shells in the outer Milky Way (Ehlerova+, 2005)
HI shells in the outer Milky Way.
Ehlerova S., Palous J.
<Astron. Astrophys., 437, 101-112 (2005)>
=2005A&A...437..101E 2005A&A...437..101E
ADC_Keywords: Interstellar medium ; H I data ; Milky Way ; Radial velocities
Keywords: ISM: bubbles - ISM: structure - Galaxy: structure
Abstract:
We present results of a method for an automatic search for HI shells
in 3D data cubes and apply it to the Leiden-Dwingeloo HI survey of
the northern Milky Way. In the 2nd Galactic quadrant, where
identifications of structures are not substantially influenced by
overlapping, we find nearly 300 structures.
Description:
The catalogue of HI shells in the Milky Way identified in the
Leiden-Dwingeloo HI survey by an automatic code described in the paper.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 80 628 HI shells in the Leiden-Dwingeloo survey
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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- 3 I3 --- shell Running number of the structure
4- 17 A14 --- GSname GS name of the structure (GSlll+bb+vvv)
20- 24 F5.1 deg GLON Galactic longitude
27- 31 F5.1 deg GLAT Galactic latitude
34- 39 F6.1 km/s RVLSR Radial velocity of the center relative to the
local standard of rest (LSR)
41- 45 F5.1 deg DelGLON The shell dimension in the Galactic longitude
direction
47- 51 F5.1 deg DelGLAT The shell dimension in the Galactic latitude
direction
53- 57 F5.1 km/s DelRV The shell extent in radial velocity
60 I1 --- Qual The quality (= reliability) index (2)
61- 80 A20 --- Notes The identification of the structure in other
lists (1)
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Note (1): References are:
(1) = Heiles, 1979ApJ...229..533H 1979ApJ...229..533H
(2) = Heiles, 1984ApJS...55..585H 1984ApJS...55..585H
(3) = Hu, 1981ApJ...248...119H
Individual notes:
- shell 69: GS052+07+39 (1) + GS054+12+25 (2)
- shell 174: GS088+02-103 (1) + GS091+02-101 (1)
- shell 177: GS087+03+19 (1) + GS090-04-8 (2)
- shell 560: GS223-02+35 (1) + GS228-05+47 (1) + GS226-09+30 (2)
Note (2): the quality index is based on the visual appearance of the
structure and it is not part of the automatic search. A quality index
of 1 denotes clearly visible and pronounced shells, while an index 4
refers to low-contrast and not well-pronounced shells. Indices 2 and 3
are intermediate steps.
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Acknowledgements: Sona Ehlerova, sona(at)alnitak.ig.cas.cz
(End) Patricia Vannier [CDS] 14-Jun-2005