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Several X-ray and gamma ray sources have been detected around η Carinae, for example 4U 1037–60 in the 4th Uhuru catalogue and 1044–59 in the HEAO-2 catalog. The earliest detection of X-rays in the η Carinae region was from the Terrier-Sandhawk rocket, [ 66 ] followed by Ariel 5 , [ 67 ] OSO 8 , [ 68 ] and Uhuru [ 69 ] sightings.
Several X-ray and gamma-ray sources have been detected around Eta Carinae, for example 4U 1037–60 in the 4th Uhuru catalogue and 1044–59 in the HEAO-2 catalog. The earliest detection of X-rays in the Eta Carinae region was from the Terrier-Sandhawk rocket, [ 60 ] followed by Ariel 5 , [ 61 ] OSO 8 , [ 62 ] and Uhuru [ 63 ] sightings.
AG Carinae, a massive Luminous blue variable and a part of the Carina constellation, which is transitioning from an O-type star to a Wolf-Rayet star. Eta Carinae, inside the Carina Nebula in the southern constellation of Carina. Eta Carinae is extremely massive, possibly as much as 120 to 150 times the mass of the Sun, and is four to five ...
The answer is way more complicated than that ;) Angular diameters are not god-given facts. They are calculated from interferometric models that make certain assumptions about the shape and brightness of the stars disc (eg. uniform or limb-darkened, star spots, etc.), and they are inevitably made at a single wavelength usually in the infrared.
Luminous blue variable stars can undergo "giant outbursts" with dramatically increased mass loss and luminosity. η Carinae is the prototypical example, [20] with P Cygni showing one or more similar outbursts 300–400 years ago, [21] but dozens have now been catalogued in external galaxies.
Possible examples of supernova impostors include the Great Eruption of Eta Carinae, P Cygni, SN 1961V, [3] SN 1954J, SN 1997bs, SN 2008S in NGC 6946, and SN 2010dn [1] where detections of the surviving progenitor stars are claimed.
For example, the Eta Carinae system is emitting large quantities of gas and dust. These enormous outbursts can be used to infer that the star system is nearing the end of its life, and will explode as a supernova within a relatively short period of astronomical time. [ 6 ]
Eta Carinae, Apep, and WR 104 have been cited as possible future gamma-ray burst progenitors. [121] It is unclear if any star in the Milky Way has the appropriate characteristics to produce a gamma-ray burst. [122] The massive-star model probably does not explain all types of gamma-ray burst.