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J/A+A/547/A12       Leading arm Magellanic Cloud Catalog     (Venzmer+, 2012)
The four leading arms of the Magellanic Cloud System. Evidence for interaction
with Milky Way disk and halo.
    Venzmer M.S., Kerp J., Kalberla P.M.W.
   <Astron. Astrophys. 547, A12 (2012)>
   =2012A&A...547A..12V
ADC_Keywords: Magellanic Clouds ; Molecular clouds ; H I data ; Morphology

Keywords: Magellanic Clouds - galaxies: interaction - evolution - Galaxy: halo


Abstract:
    The Magellanic Cloud system (MCS) interacts via tidal and drag forces
    with the Milky Way galaxy.

    Using the Parkes Galactic All-Sky Survey (GASS) of atomic hydrogen we
    explore the role of drag on the evolution of the so-called Leading Arm
    (LA).

Description:
    The table represents a HI cloud catalogue of the Magellanic Cloud
    System's Leading Arm region. The catalogue is the result of a source
    finding algorithm applied on Parkes Galactic all-sky (GASS) data of
    that region. The considered size of the Leading Arm region in
    Magellanic Stream (MS) coordinates is: 0°<lMS<70°;
    -42.5°<bMS<42.5°. The considered Galactic standard of rest
    (GSR) velocity range is: -80km/s<vGSR<250km/s.
    The Leading Arm cloud catalog contains 449 spatial/kinetical separated
    emissions.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table2.dat       355      449   Leading Arm cloud catalog


See also:
 J/ApJ/702/940 : Properties and origin of the HVC toward the LMC (Lehner+, 2009)


Byte-by-byte Description of file: table2.dat

   Bytes Format Units    Label     Explanations

   1-  3  I3    ---      Seq       [1/449] Sequential number
   5-  8  I4    ---      ID        [258/2027] Internal ID number
  10- 29  A20   ---      Name      High-velocity cloud (HVC) name (1)
  31- 37  F7.2 deg2.km/s phVol     Phase space volume in deg2*km/s
  39- 48  F10.2 Msun     M         Mass at 50kpc in solar masses
  50- 57  E8.2  sr       omega     Solid angle
  59- 68  F10.1 pc2      Area      Area at 50kpc from solid angle
  70- 73  F4.2  deg      Diam      Spherical diameter from solid angle
  75- 80  F6.1  pc       Diam.pc   Spherical diameter at 50kpc from area
  82- 89  E8.3  cm-2     NH.p      Peak column density
  91- 98  E8.3  cm-2     NH.m      Mean column density
 100-107  E8.2  cm-3     Density   Mean cloud density at 50kpc
 109-114  F6.2  K/cm3    P         Mean cloud pressure at 50kpc in K*cm-3
 116-119  I4    ---      Nloc      Local maxima >0.24° and >2.4km/s
 121-122  I2    ---      Nreg      Regional maxima >0.56° and >5.6km/s
 124-128  F5.2  deg      MSLON     Centre of mass Magellanic stream longitude
 130-135  F6.2  deg      MSLAT     Centre of mass Magellanic stream latitude
 137-142  F6.2  deg      GLON      Centre of mass Galactic longitude
 144-149  F6.2  deg      GLAT      Centre of mass Galactic latitude
 151-156  F6.2  deg      RAdeg     Centre of mass right ascension (J2000)
 158-163  F6.2  deg      DEdeg     Centre of mass declination (J2000)
 165-170  F6.2  km/s     HRV       Centre of mass heliocentric radial velocity
 172-177  F6.2  km/s     LRV       Centre of mass local standard of rest
                                    velocity (2)
 179-184  F6.2  km/s     GRV       Centre of mass Galactic standard of rest
                                    velocity (2)
 186-192  F7.2  km/s     LGRV      Centre of mass local group standard of rest
                                    velocity ((2)
 194-198  F5.2  km/s     FWHM      Centre of mass velocity FWHM
 200-205  F6.2  ---      xxVar     Centre of mass xxVariance (5)
 207-212  F6.2  ---      yyVar     Centre of mass yyVariance (5)
 214-219  F6.2  ---      xyVar     Centre of mass xyVariance (5)
 221-225  F5.2  ---      xSkew     Centre of mass xSkewness (5)
 227-231  F5.2  ---      ySkew     Centre of mass ySkewness (5)
 233-237  F5.2  ---      xKurt     Centre of mass xKurtosis (5)
 239-243  F5.2  ---      yKurt     Centre of mass yKurtosis (5)
 245-249  F5.1  deg      PA        Centre of mass position angle of ellipse
                                    to north (6)
 251-254  F4.2  ---      Ecc       [0/1] Centre of mass eccentricity
                                    of ellipse (6)
 256-259  F4.2  deg      MinD      Centre of mass minor diameter of ellipse (6)
 261-264  F4.2  deg      MajD      Centre of mass major diameter of ellipse (6)
 266-270  F5.2  deg      MSLonT    Peak TB Magellanic stream longitude
 272-277  F6.2  deg      MSLatT    Peak TB Magellanic stream latitude
 279-284  F6.2  km/s     VGSR.T    Peak TB GSR velocity
 286-290  F5.1  deg      PA.T      Angle between CM-peak TB line and north
 292-295  F4.2  K        TB        Peak brightness temperature (TB)
 297-301  F5.2  km/s     FWHM.T    Peak TB velocity FWHM
 303-309  F7.1  K        TDop.T    Peak TB Doppler temperature at 50kpc
 311-317  F7.1  pc       S-LW.T    Peak TB Size-linewidth relation
 319-323  F5.2  deg      MSLonC    Centroid Magellanic stream longitude (7)
 325-330  F6.2  deg      MSLatC    Centroid Magellanic stream latitude (7)
 332-337  F6.2  km/s     VGSR.C    Centroid GSR velocity (7)
 339-343  F5.2  deg      SizeLON   Size along Magellanic stream longitude
 345-348  F4.2  deg      SizeLAT   Size along Magellanic stream latitude
 350-355  F6.2  km/s     SizeVel   Size along radial velocity

Note (1): The name is containing the HVC's center of mass (CM) position in
    Magellanic stream coordinates and GSR velocity, as HVC LLL.ll+BB.b+VVV.V.
Note (2): The Local Standard of Rest (LSR), the Galactic Standard of Rest
     (GSR) and the Local Group Standard of Rest (LGSR) velocities are
     defined from the heliocentric radial velocity by:
     v(LSR) = v(HEL)+9km/s*cos(l)*cos(b)+12km/s*sin(l)*cos(b)+7km/s*sin(b)
     v(GSR) = v(LSR)+220km/s*sin(l)*cos(b)
    v(LGSR) =v(GSR)-62km/s*cos(l)*cos(b)+40km/s*sin(l)*cos(b)-35km/s*sin(b)
Note (5): This parameter is derived from higher moment analysis of the emission.

Note (6): The ellipse is derived from higher moments. Its size, orientation
     and elongation approaches the emission's shape.
Note (7): Here centroid stands for the geometrical center of the full extent.



Acknowledgements:
    Malte Venzmer, mvenzmer(at)astro.physik.uni-goettingen.de
(End)              Malte Venzmer [UGOE], Patricia Vannier [CDS]      24-Aug-2012