J/A+A/641/A121 G203.7+11.5 21cm and 11cm intensity maps (Reich+, 2020)
Long, depolarising Hα-filament towards the Monogem ring.
Reich W., Reich P., Sun X.
<Astron. Astrophys. 641, A121 (2020)>
=2020A&A...641A.121R 2020A&A...641A.121R (SIMBAD/NED BibCode)
ADC_Keywords: Supernova remnants ; Radio sources ; Polarization
Keywords: polarisation: ISM - ISM: individual objects: Monogem Ring -
ISM: magnetic fields - radio continuum: ISM
Abstract:
In soft X-rays, the Monogem ring is an object with a diameter of
25° located in the Galactic anti-centre. It is believed to be a
faint, evolved, local supernova remnant. It is not seen at radio
wavelengths, as other large supernova remnants are. We study a narrow
about 4.5D long, faint Halpha-filament, G203.7+11.5, that is seen
towards the centre of the Monogem ring. It causes depolarisation and
excessive Faraday rotation of radio polarisation data. Polarisation
observations at 11cm and 21cm with the Effelsberg 100-m telescope were
analysed.
Description:
G203.7+11.5 is visible on the EMLS λ21cm maps as a long, narrow
polarisation depression (canal) that extends from l,b ∼ 204°,
+12° to l,b ∼ 203.3° + 10°. We used total-intensity and
linear-polarisation data from an unpublished section of the EMLS. When
completed, the EMLS will cover the northern Galactic plane ±20°
in latitude at an angular resolution of 9.4'.
Radio continuum and linear polarisation observations of G203.7+11.5
were made at λ11cm with the Effelsberg 100-m radio telescope.
The observations started in 1997/1999 and were completed with an
improved λ11cm receiver in 2007.
Objects:
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RA (2000) DE Designation(s)
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06 58 50 +13 55.9 NAME Mon-Gem Ring = SNR G201.1+08.3
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 130 14 List of fits maps
fits/* . 14 Individual fits maps
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1 A1 --- --- [G]
2- 10 F9.5 deg GLON Galactic longitude of center (J2000)
11- 19 F9.5 deg GLAT Galactic latitude of center (J2000)
21- 22 I2 --- Nx Number of pixels along X-axis
24- 26 I3 --- Ny Number of pixels along Y-axis
28- 38 F11.6 yr Obs.date Observation date
40- 44 F5.3 GHz Freq Observed frequency
46- 47 I2 Kibyte size Size of FITS file
49- 76 A28 --- FileName Name of FITS file, in subdirectory fits
78-130 A53 --- Title Title of the FITS file
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Acknowledgements:
Wolfgang Reich, wreich(at)mpifr-bonn.mpg.de
(End) Patricia Vannier [CDS] 21-Jul-2020