G54.4-0.3

Note: this is an archived version which has been superseded.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

(HC40)

Notes: Has been called G54.5−0.3.

Radio: Shell, in complex region.
Optical: Faint filaments.
Point sources: Pulsar outside NW rim.
Distance: HI and CO observations suggest 6.6 kpc, H₂ emission suggests 5.4 kpc, optical extinction suggests 6.6 kpc.

References:

Velusamy & Kundu 1974, A&A, 32, 375. NRAO 300-ft at 2.7 GHz (5': S=34.4±5.0 Jy). ADS
Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2.'6). ADS
Caswell 1985, AJ, 90, 1224. DRAO at 1.4 GHz (1.'3×2.'6: S=18±4 Jy). ADS
Velusamy et al. 1986, JApA, 7, 105. WSRT at 609 MHz (50''×191'' smoothed to 100''×200''). ADS
Junkes et al. 1992, A&AS, 96, 1. Surrounding CO. ADS
Junkes et al. 1992, A&A, 261, 289. Nearby IRAS sources. ADS
Boumis et al. 2005, A&A, 443, 175. Optical observations. ADS
Reach et al. 2006, AJ, 131, 1479. Spitzer observations. ADS
Kang & Koo 2007, ApJS, 173, 85. SGPS of high velocity HI. ADS
Andersen et al. 2011, ApJ, 742, 7. Spitzer observations. ADS
Park et al. 2013, ApJ, 777, 14. Arecibo of HI in region. ADS
Froebrich et al. 2015, MNRAS, 454, 2586. H₂ IR observations. ADS
Karpova et al. 2017, MNRAS, 466, 1757. X-ray observations of pulsar. ADS
Ranasinghe & Leahy 2017, ApJ, 843, 119. HI and CO observations. ADS
Lee et al. 2019, AJ, 157, 123. H₂ IR observations. ADS
Chawner et al. 2020, MNRAS, 493, 2706. Herschel observations. ADS
Lee et al. 2020, AJ, 160, 263. H₂ IR observations. 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=0.6 Jy) including polarisation, and Spitzer observations. ADS

Last updated: 20 Dec 2022

Dave Green / Cambridge, UK /