SIMBAD references

2011ApJ...737L..22C - Astrophys. J., 737, L22 (2011/August-2)

Expansion of the youngest galactic supernova remnant G1.9+0.3.

CARLTON A.K., BORKOWSKI K.J., REYNOLDS S.P., HWANG U., PETRE R., GREEN D.A., KRISHNAMURTHY K. and WILLETT R.

Abstract (from CDS):

We present a measurement of the expansion and brightening of G1.9 + 0.3, the youngest Galactic supernova remnant (SNR), comparing Chandra X-ray images obtained in 2007 and 2009. A simple uniform-expansion model describes the data well, giving an expansion rate of 0.642%±0.049%/yr and a flux increase of 1.7%±1.0%/yr. Without deceleration, the remnant age would then be 156±11 yr, consistent with earlier results. Since deceleration must have occurred, this age is an upper limit; we estimate an age of about 110 yr or an explosion date of about 1900. The flux increase is comparable to reported increases at radio wavelengths. G1.9+0.3 is the only Galactic SNR increasing in flux, with implications for the physics of electron acceleration in shock waves.

Abstract Copyright:

Journal keyword(s): ISM: individual: G1.9+0.3 - ISM: supernova remnants - X-rays: ISM

Simbad objects: 4

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2021.06.23-18:19:44

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