J/MNRAS/344/1 22GHz observations of VX Sgr (Murakawa+, 2003)
The radially expanding molecular outflow of VX Sagittarii.
Murakawa K., Yates J.A., Richards A.M.S., Cohen R.J.
<Mon. Not. R. Astron. Soc., 344, 1-12 (2003)>
=2003MNRAS.344....1M 2003MNRAS.344....1M
ADC_Keywords: Stars, supergiant ; Masers
Keywords: masers - circumstellar matter - stars: kinematics - stars: late-type -
stars: mass-loss - radio lines: stars
Abstract:
We used MERLIN to observe 22-GHz H2O maser emission from the red
supergiant VX Sgr in 1994 and 1999. The masers lie in a region
300-400mas in diameter. The angular size and the velocity
distribution of the masers are similar at both epochs, although the
total flux density in 1999 is only half of that seen in 1994.
Description:
The 22-GHz H2O maser emission from VX Sgr was observed on 1994 April
26 and 1999 January 16 for 5 and 7hr, respectively, in both left and
right circular polarization, using 5 antennas of MERLIN.
Objects:
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RA (2000) DE Designation(s)
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18 08 04.05 -22 13 26.6 VX Sgr = HIP 88838
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tables1.dat 63 92 22GHz H2O maser features in the CSE of VX Sgr
observed by MERLIN in 1994
tables2.dat 61 97 22GHz H2O maser features in the CSE of VX Sgr
observed by MERLIN in 1999
tables3.dat 64 43 Summary of the proper motion analysis for common
features between 1994 and 1999
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See also:
J/ApJ/640/982 : 43GHz SiO maser features around VX Sgr (Chen+, 2006)
J/A+A/524/A99 : Polarisation of S Per and VX Sgr in OH (Szymczak+, 2010)
Byte-by-byte Description of file: tables1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- ID1 [1/92] ID number, 1994 observation
4- 8 F5.1 km/s Vlsr Flux-weighted mean LSR velocity
10- 12 F3.1 km/s DV Change in VLSR across the whole feature,
ΔV
14- 17 F4.2 km/s DV1/2 Velocity FWHM, ΔV1/2
19- 22 F4.2 km/s e_DV1/2 rms uncertainty on DV1/2
24- 29 F6.1 mas x Error-weighted centroid
31- 33 F3.1 mas e_x rms uncertainty on x
35- 40 F6.1 mas y Error-weighted centroid
42- 46 F5.2 mas e_y rms uncertainty on y
47- 54 F8.3 Jy P P flux density (in Jy/beam), at 22GHz
56- 60 F5.1 Jy.km/s S Integrated flux density, at 22GHz
62- 63 I2 --- ID2 [1/97]? ID number, 1999 observation
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Byte-by-byte Description of file: tables2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- ID2 [1/97] ID number, 1999 observation
4- 8 F5.1 km/s Vlsr Flux-weighted mean LSR velocity
10- 12 F3.1 km/s DV Change in VLSR across the whole feature,
ΔV
14- 17 F4.2 km/s DV1/2 Velocity FWHM, ΔV1/2
19- 22 F4.2 km/s e_DV1/2 rms uncertainty on DV1/2
24- 29 F6.1 mas x Error-weighted centroid
31- 33 F3.1 mas e_x rms uncertainty on x
35- 40 F6.1 mas y Error-weighted centroid
42- 44 F3.1 mas e_y rms uncertainty on y
46- 52 F7.3 Jy P P flux density (in Jy/beam), at 22GHz
54- 58 F5.1 Jy.km/s S Integrated flux density, at 22GHz
60- 61 I2 --- ID1 [1/92]? ID number, 1994 observation
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Byte-by-byte Description of file: tables3.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- ID1 [1/92] ID number, 1994 observation
4- 5 I2 --- ID2 [1/97] ID number, 1999 observation
7- 11 F5.2 mas Delta Total angular separation between 1994 and 1999
13- 16 F4.2 mas e_Delta rms uncertainty on Delta
18- 23 F6.2 mas Da Radial component of the total angular
separation between 1994 and 1999, Δa
25- 28 F4.2 mas e_Da rms uncertainty on Da
30- 35 F6.2 mas Dtheta Tangential component of the total angular
separation between 1994 and 1999
37- 41 F5.2 mas e_Dtheta rms uncertainty on e_Dtheta
43- 47 F5.1 km/s Va Radial component of the proper motion
expansion velocity
49- 52 F4.1 km/s e_Va rms uncertainty on Va
54- 58 F5.1 km/s Vtheta Tangential component of the proper motion
expansion velocity
60- 64 F5.1 km/s e_Vtheta rms uncertainty on Vtheta
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 16-Jul-2012