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E0102
SN010102

Tour of E0102
Event type	Supernova remnant
Constellation	Tucana
Right ascension	01 04 1.50
Declination	-72° 01' 55.7"
Epoch	J2000.0
Distance	190,000 ly
Other designations	1ES 0102-72.2, RBS 146, 1RXS J010403.5-720158, [KPF99] 183, [KPF99] 182, [HFP2000] 107, [FJW97] SMC B0102-7218, RX J0104.0-7201, PKS 0102-723, [FBR2002] J010402-720149, MC4 0102-72.3, RX J0103.9-7202, SUMSS J010401-720153
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E0102, short for 1E 0102.2-7219, is the remnant of a supernova that exploded in the Small Magellanic Cloud, a neighbouring galaxy of the Milky Way. The supernova was caused when a star much more massive than the Sun collapsed under its own gravity. The explosion would have been visible from the Southern Hemisphere of the Earth over 1000 years ago.

The appearance of E0102 is best explained by a model in which the ejecta is shaped like a cylinder that is being viewed almost exactly end-on. This model suggests that the explosion that created the E0102 remnant may itself have been strongly asymmetric, consistent with the rapid kicks given to neutron stars after supernova explosions. Another possibility is that the star exploded into a disk of material formed when material was shed from the equator of the pre-supernova red giant star. Such asymmetries have been observed in winds from lower mass red giants that form planetary nebulae.

The remnant consists of an outer blast wave produced by the supernova, and an inner ring of cooler material. This inner ring is probably expanding ejecta from the explosion that is being heated by a shock wave travelling backwards into the ejecta. At its center is an isolated neutron star, the first such neutron star discovered outside the Milky Way.

Gallery

• Featured in this Hubble image is an expanding, gaseous corpse — a supernova remnant — known as 1E 0102.2-7219.

References

1. ^ "E0102". NASA.
2. Astronomers Find Isolated Neutron Star in Small Magellanic Cloud
3. "Hubble Pinpoints Supernova Blast". esahubble.org/. Retrieved 29 January 2021.

v t e Constellation of Tucana
List of stars in Tucana Tucana in Chinese astronomy
Stars	Bayer α β β β γ δ ε ζ η θ ι κ λ λ μ ν π ρ Variable DS HR 8829 HD 4308 5980 7199 (Emiw) 215497 221287 (Poerava) Other AB7 Gliese 54 HV 2112 HV 11417 HV 11423 L 168-9 PMMR 62 SMC 018136
Exoplanets DS Tucanae Ab HD 4308 b HD 7199 b (Hairu) HD 215497 b c HD 219077 b HD 221287 b (Pipitea)
Star clusters	NGC 121 152 176 220 222 231 241 256 265 267 269 290 294 299 306 330 339 346 361 362 371 376 395 411 416 419 422 456 458 460 465 Other ξ (47)
Nebulae E0102
Galaxies	NGC 53 360 406 432 434 440 466 484 7329 Other ESO 148-2 ISOHDFS 27 Tucana Dwarf Small Magellanic Cloud (partly in Hydrus)
Category

• Supernova remnants
• Tucana