LOFAR detections of low-frequency radio recombination lines towards Cassiopeia A

Asgekar, A; Anderson, J M; Oonk, J B R; Yatawatta, S; van Weeren, R. J.; White, G; Miller-Jones, J. C. A.; Bonafede, A; Best, Phillip; Butcher, Harvey; Orru, E; Conway, J E; McKay-Bukowski, D; McKean, J P; Avruch, Ian M.; Beck, Rainer; Bell, Michael R; van Bemmel, Illse; Bentum, M J; Bernardi, G; Braun, R; Breitling, F; Brouw, W. N.; Ciardi, Benedetta; de Gasperin, F; de Geus, Eugene; de Vos, Marco; Duscha, S; Fallows, R A; Frieswijk, W; Garrett, M A; Gunst, A W; Heald, G; Hessels, J. W. T.; Hoeft, M; Iacobelli, M.; Intema, Huib T; Kohler, Jens; Kondratiev, V. I.; Kuniyoshi, M; Kuper, G.; van Leeuwen, J; Maat, P; Mann, Gottfried; Mol, J. D.; Mulcahy, D.D.; Munk, H; Norden, M J; Pizzo, R; Polatidis, A.G.; Reich, W; Schoenmakers, Arno; Sluman, J; Sobey, C; Steinmetz, M.; Tang, Y; Vermeulen, R.C.; Vocks, Christian; Wise, M J

LOFAR detections of low-frequency radio recombination lines towards Cassiopeia A

Date

2013

Authors

Asgekar, A

Anderson, J M

Oonk, J B R

Yatawatta, S

van Weeren, R. J.

White, G

Miller-Jones, J. C. A.

Bonafede, A

Best, Phillip

Butcher, Harvey

Publisher

Springer

Abstract

Cassiopeia A was observed using the low-band antennas of the LOw Frequency ARray (LOFAR) with high spectral resolution. This allowed a search for radio recombination lines (RRLs) along the line-of-sight to this source. Five carbon α RRLs were detected in