180 citations · 1k across the 12 of their papers we have counts for
12 papers
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…
Temperature Equilibration Behind the Shock Front: an Optical and X-ray Study of RCW 86
E. A. Helder, J. Vink, C. G. Bassa
We study the electron-proton temperature equilibration behind several shocks of the RCW 86 supernova remnant. To measure the proton temperature, we use published and new optical sp…
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…