180 citations · 1k across the 12 of their papers we have counts for
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Proper Motions of H-alpha filaments in the Supernova Remnant RCW 86
E. A. Helder, J. Vink, A. Bamba +4
We present a proper motion study of the eastern shock-region of the supernova remnant RCW 86 (MSH 14-63, G315.4-2.3), based on optical observations carried out with VLT/FORS2 in 20…
Chandra observations of SN 1987A: the soft X-ray light curve revisited
E. A. Helder, P. S. Broos, D. Dewey +6
We report on the present stage of SN 1987A as observed by the Chandra X-ray Observatory. We reanalyze published Chandra observations and add three more epochs of Chandra data to ge…
Observational signatures of particle acceleration in supernova remnants
E. A. Helder, J. Vink, A. M. Bykov +3
We evaluate the current status of supernova remnants as the sources of Galactic cosmic rays. We summarize observations of supernova remnants, covering the whole electromagnetic spe…
Effects of Neutral Hydrogen on Cosmic Ray Precursors in Supernova Remnant Shock Waves
John C. Raymond, J. Vink, E. A. Helder +1
Many fast supernova remnant shocks show spectra dominated by Balmer lines. The H profiles have a narrow component explained by direct excitations and a thermally Doppler broaden…
The relation between post-shock temperature, cosmic-ray pressure and cosmic-ray escape for non-relativistic shocks
Jacco Vink, R. Yamazaki, E. A. Helder +1
Supernova remnants are thought to be the dominant source of Galactic cosmic rays. This requires that at least 5% of the available energy is transferred to cosmic rays, implying a h…
Cosmic-Ray Acceleration Efficiency vs Temperature Equilibration: the Case of SNR 0509-67.5
E. A. Helder, D. Kosenko, J. Vink
We study the 0509-67.5 supernova remnant in the Large Magellanic Cloud with the VLT/FORS2 spectrograph. We detect a broad component in the H-alpha emission with a FWHM of 2680 \pm…