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J/ApJ/792/43  Detected sources in the region of Magellanic Stream   (For+, 2014)

The Magellanic Stream and debris clouds. For B.-Q., Staveley-Smith L., Matthews D., McClure-Griffiths N.M. <Astrophys. J., 792, 43 (2014)> =2014ApJ...792...43F (SIMBAD/NED BibCode)
ADC_Keywords: Magellanic Clouds ; Interstellar medium ; H I data Keywords: ISM: kinematics and dynamics; Magellanic Clouds; radio lines: ISM Abstract: We present a study of the discrete clouds and filaments in the Magellanic Stream using a new high-resolution survey of neutral hydrogen (H I) conducted with the H75 array of the Australia Telescope Compact Array, complemented by single-dish data from the Parkes Galactic All-Sky Survey. From the individual and combined data sets, we have compiled a catalog of 251 clouds and listed their basic parameters, including a morphological description useful for identifying cloud interactions. We find an unexpectedly large number of head-tail clouds in the region. The implication for the formation mechanism and evolution is discussed. The filaments appear to originate entirely from the Small Magellanic Cloud and extend into the northern end of the Magellanic Bridge. Description: The ATCA high-resolution MS survey covers a 500 deg2 field of the Magellanic Stream (here after MS) using the H75 configuration of the ATCA. MS I to MS IV, part of the SMC, and the Interface Region (IFR) are covered in this survey. The observations were carried out over a period from 2005 to 2006, which resulted in ∼180 hr of total observing time. The entire area was divided into 33 regions with 154 pointing centers per region, resulting in 5082 pointing centers. Each pointing center was separated by 20', arranged in a hexagonal grid, observed for 20 s, and revisited six times during an average of 10 hours of observation. The resulting ATCA data have an angular resolution of 413''x330'', a brightness sensitivity of 210 mK and a velocity resolution of 1.65 km/s after Hanning smoothing. The survey covers the local standard of rest velocity (VLSR) between -315 and +393 km/s. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 116 253 Catalog of detected sources in the region of the Magellanic Stream
See also: II/228 : DENIS Catalogue toward Magellanic Clouds (DCMC) (Cioni+ 2000) J/ApJ/702/940 : Radio and UV spectra of HVC toward the MC (Lehner+, 2009) J/ApJ/764/74 : GASS HVCs in the Magellanic Leading Arm region (For+, 2013) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- ID [1/253] Index identifier 5- 22 A18 --- Name Designation (1) 24- 28 F5.1 deg LMS Magellanic Stream longitude (2) 30- 34 F5.1 deg BMS Magellanic Stream latitude (2) 36- 41 F6.1 km/s VLSR ? Local Standard of Rest velocity 43- 48 F6.1 km/s VGSR ? Galactic Standard of Rest velocity (3) 50- 55 F6.1 km/s VLGSR ? Local Group Standard of Rest velocity (4) 57- 60 F4.1 km/s FWHM ? Velocity Full-Width at Half-Maximum (5) 62- 67 F6.1 Jy.km/s Fint ? Corrected, integrated flux 69- 73 F5.2 K TB ? Peak brightness temperature 75- 79 F5.2 10+19/cm2 NHI ? Peak H I column density 81- 83 F3.1 deg MajAxis ? Source semi-major axis 85- 87 F3.1 deg MinAxis ? Source semi-minor axis 89- 91 A3 deg PA ? Source position angle 93- 95 A3 --- Flag Warning flag (6) 97- 99 A3 --- Class Morphological classification (7) 101 A1 --- Data [G-H] Data origin flag (8) 103-116 A14 --- Comment Additional comment
Note (1): Where the designation name is HVC l±b+VLSR. Note (2): This new coordinate system defines LMS=0 deg. at the center of the Large Magellanic Cloud (LMC), i.e., (l,b)=280.47 deg., -32.75 deg. (van der Marel et al. 2002AJ....124.2639V) and the pole at (l,b)=188.5 deg., -7.5 deg. The LMS decreases in value toward the tip of the MS and increases in value toward the LA. Note (3): Defined by VGSR=220cos(b)sin(l)+VLSR. Note (4): Defined by VLGSR=VGSR-62cos(l)cos(b)+40sin(l)cos(b)-35sin(b) (Braun & Burton 1999A&A...341..437B). Note (5): Measured at 50% of peak flux. Note (6): Flag as follows: SR = the detection lies at the edge of the spectral region; E = the detection is next to the spatial edge of the image. Note (7): Flag as follows: HT = head-tail cloud with velocity gradient; :HT = head-tail cloud without velocity gradient; S = symmetric cloud; B = bow-shock cloud; IC = irregular/complex cloud. Note (8): Flag as follows: H = H75GASS, combined ATCA data with GASS data; G = GASS data.
History: From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 05-Apr-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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