Access to Astronomical Catalogues

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
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:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        80      628   HI shells in the Leiden-Dwingeloo survey


Byte-by-byte Description of file: table1.dat

   Bytes Format Units   Label     Explanations

   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)

Note (1): References are:
    (1) = Heiles, 1979ApJ...229..533H
    (2) = Heiles, 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.


Acknowledgements: Sona Ehlerova, sona(at)alnitak.ig.cas.cz

(End)                                      Patricia Vannier [CDS]    14-Jun-2005