G22.7−0.2 ADS: search title/keyword/abstract or fulltext

• Right Ascension: 18 33 15
• Declination: −09 13
• Size (/arcmin): 26
• Type: S?
• Flux density at 1 GHz (/Jy): 33
• Spectral Index: 0.6

Radio: Non-thermal ring in complex region, overlapping G23.3−0.3.

X-ray: Possible detection.

Point sources: Variable radio source near centre, and γ-ray source near edge.

Distance: Association with CO indicates 4.4 kpc, HI absorption suggests 4.7 kpc, optical extinction suggests 4.7 kpc.

References:

• Shaver & Goss 1970, AuJPA, 14, 133. Molonglo at 408 MHz (3′) and Parkes 64-m at 5 GHz (4′). ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2.′6). ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3.′3×3.′4: S=82 Jy). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS
• Reach et al. 2006, AJ, 131, 1479. Spitzer observations. ADS
• Becker et al. 2010, AJ, 140, 157. Variable radio source detection. ADS
• Andersen et al. 2011, ApJ, 742, 7. Spitzer observations. ADS
• Su et al. 2014, ApJ, 796, 122. CO observations. ADS
• Su et al. 2015, ApJ, 811, 134. CO observations of region. ADS
• H.E.S.S. Collaboration: Abramowski et al. 2015, MNRAS, 446, 1163. H.E.S.S. observations. ADS
• Mori et al. 2017, ApJ, 848, 80. NuSTAR, Chandra and XMM-Newton observations. ADS
• Ranasinghe & Leahy 2018, AJ, 155, 204. VGPS HI absorption observations. ADS
• Hogge et al. 2019, ApJ, 887, 79. Molecular line observations. ADS
• Tam et al. 2020, ApJ, 899, 75. Fermi observations of region. ADS
• Wang et al. 2020, A&A, 639, A72. Optical extinction for distance. ADS
• Dokara et al. 2021, A&A, 651, A86. VLA at 4 to 8 GHz (18″: S=0.7 Jy) including polarisation, and Spitzer observations. ADS
• Sofue et al. 2021, ApJS, 253, 17. Nobeyama 45-m CO observations (20″) of region. ADS

Last updated: 20 Dec 2022

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