3rd quadrant Galactic SNRs


G180.0−1.7 ADS: search fulltext or title/keyword/abstract

S147

Radio: Large faint shell, with spectral break.
Optical: Wispy ring.
X-ray: Possible detection.
Point sources: Pulsar within boundary, with faint wind nebula.
Distance: Various observations suggest about 1.2 kpc.

References:

Last updated: 16 Dec 2022


G181.1+9.5 ADS: search fulltext or title/keyword/abstract

Radio: Faint shell.
X-ray: Detected.
Distance: HI observations suggest 0.5–2.5 kpc.

References:

Last updated: 5 Aug 2022


G182.4+4.3 ADS: search fulltext or title/keyword/abstract

Radio: Incomplete shell.
Optical: Brighter in S and NW.
X-ray: Diffuse emission.
Distance: Optical extinction suggests 1.1 kpc.

References:

Last updated: 13 Dec 2022


G184.6−5.8 ADS: search fulltext or title/keyword/abstract

Crab Nebula, 3C144, SN1054

Notes: This is the remnant of the SN of AD1054.

Radio: Filled-centre, central pulsar, with faint `jet' (or tube) extending from the N edge; shows secular decline.
Optical: Strongly polarised filaments, diffuse synchrotron emission, with `jet' faintly visible.
X-ray: Central `torus' around the pulsar.
Point sources: Pulsar powering the remnant.
Distance: Proper motions and radial velocities give 2 kpc.

References:

Last updated: 16 Dec 2022


G189.1+3.0 ADS: search fulltext or title/keyword/abstract

IC443, 3C157

Radio: Limb-brightened to NE, with faint extension to the E.
Optical: Brightest to the NE, with faint filaments outside the NE boundary.
X-ray: Shell, brightest to the NE, plus compact source with nebula.
Point sources: X-ray source and nebula in S.
Distance: Optical observations imply 1.9 kpc, optical extinction suggests 1.8 kpc.

References:

Last updated: 15 Dec 2022


G190.9−2.2 ADS: search fulltext or title/keyword/abstract

Radio: Incomplete shell.
Distance: Association with dust and optical extinction suggest about 1 kpc.

References:

Last updated: 13 Dec 2022


G205.5+0.5 ADS: search fulltext or title/keyword/abstract

Monoceros Nebula

Radio: In complex region, parts may be HII regions.
Optical: Large ring, near Rosette nebula.
X-ray: Possibly detected.
Distance: Association with molecular cloud suggests 1.6 to 2.0 kpc, association with dust or and optical extinction suggests about 1.1 kpc.

References:

Last updated: 15 Dec 2022


G206.9+2.3 ADS: search fulltext or title/keyword/abstract

PKS 0646+06

Radio: Diffuse source near the Monoceros Nebula.
Optical: Filaments detected.
X-ray: Possibly detected.
Distance: Optical extinction suggests about 0.9 kpc.

References:

Last updated: 13 Dec 2022


G213.0−0.6 ADS: search fulltext or title/keyword/abstract

Notes: Has also been called G213.3−0.4.

Radio: Large, faint shell.
Optical: Filamentary shell.
Point sources: Central X-ray source.
Distance: Association with molecular cloud or dust and optical extinction suggest about 1 kpc.

References:

Last updated: 15 Dec 2022


G249.5+24.5 ADS: search fulltext or title/keyword/abstract

Hoinga

Radio: Faint limb-brightened shell..
X-ray: Extended emission.

References:

Last updated: 20 Dec 2022


G260.4−3.4 ADS: search fulltext or title/keyword/abstract

Puppis A, MSH 08−44

Notes: This remnant overlaps the Vela SNR (G263.9−3.3).

Radio: Angular shell, brightest to the E, poorly defined to the W.
Optical: Nebulosity and wisps.
X-ray: Brightest to the E.
Point sources: Central possible pulsating X-ray source.
Distance: Association with HI implies 1.3 kpc.

References:

Last updated: 15 Dec 2022


G261.9+5.5 ADS: search fulltext or title/keyword/abstract

Radio: Faint shell with little limb brightening.

References:

Last updated: 13 Aug 1998


G263.9−3.3 ADS: search fulltext or title/keyword/abstract

Vela (XYZ)

Notes: This refers to the whole Vela XYZ complex, of which X has at times been classified as a separate (filled-centre) remnant. This remnant is overlapped by G260.4−3.4 and G266.2−1.2.

Radio: Large shell, with flatter spectrum component (Vela X), and pulsar nebula.
Optical: Filaments.
X-ray: Patchy shell, with extensions, central nebula and pulsar.
Point sources: Pulsar within Vela X, with one-sided `jet'.
Distance: Vela pulsar parallax gives 0.3 kpc, optical spectra and HI studies suggest 0.25 kpc.

References:

Last updated: 16 Dec 2022


G266.2−1.2 ADS: search fulltext or title/keyword/abstract

RX J0852.0−4622

Notes: This remnant overlaps the Vela SNR (G263.9−3.3).

Radio: Incomplete shell, confused by the Vela SNR.
Optical: Nebulosity offset to NE.
X-ray: Non-thermal shell, confused by the Vela SNR, with central source, and possible associated pulsar.
Point sources: Central X-ray source, with optical nebula, and possible associated pulsar.
Distance: X-ray data suggest an upper limit of 1 kpc.

References:

Last updated: 13 Dec 2022


home | documentation | detailed listings | summary listings


Dave Green / Cambridge, UK /