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 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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 355 449 Leading Arm cloud catalog
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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
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Bytes Format Units Label Explanations
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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
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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.
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Acknowledgements:
Malte Venzmer, mvenzmer(at)astro.physik.uni-goettingen.de
(End) Malte Venzmer [UGOE], Patricia Vannier [CDS] 24-Aug-2012