Note: this is an archived version which has been superseded. The current SNR catalogue is at https://www.mrao.cam.ac.uk/surveys/snrs/

G9.9−0.8 ADS: search fulltext or title/keyword/abstract

• Right Ascension: 18 10 41
• Declination: −20 43
• Size (/arcmin): 12
• Type: S
• Flux density at 1 GHz (/Jy): 6.7
• Spectral Index: 0.4

Notes: Has been called G9.95−0.81.

Radio: Shell.

Optical: Detected.

Distance: H₂ emission suggests 3.8 kpc.

References:

• Brogan et al. 2006, ApJ, 639, L25. VLA at 330 MHz (42'': S=11.0±0.3 Jy), plus other observations. ADS
• Hewitt & Yusef-Zadeh 2009, ApJ, 694, L16. OH maser search. ADS
• Stupar & Parker 2011, MNRAS, 414, 2282. Hα observations. ADS
• Froebrich et al. 2015, MNRAS, 454, 2586. H₂ IR observations. ADS
• Kilpatrick et al. 2016, ApJ, 816, 1. CO observations, including broad lines. ADS
• Lee et al. 2019, AJ, 157, 123. H₂ IR observations. ADS
• Lee et al. 2020, AJ, 160, 263. H₂ IR observations. ADS
• Dokara et al. 2021, A&A, 651, A86. VLA at 4 to 8 GHz (18'') including polarisation, and Spitzer observations. ADS

Last updated: 20 Dec 2022

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