Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 737, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/737/1/L22
Keywords
ISM: individual objects (G1.9+0.3); ISM: supernova remnants; X-rays: ISM
Categories
Funding
- NASA [G09-0062X]
- Science and Technology Facilities Council [ST/G002916/1] Funding Source: researchfish
- STFC [ST/G002916/1] Funding Source: UKRI
Ask authors/readers for more resources
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(-1) and a flux increase of 1.7% +/- 1.0% yr(-1). 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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available