LOFAR discovery of a quiet emission mode in PSR B0823+26

PSR B0823+26, a 0.53-s radio pulsar, displays a host of emission phenomena over time-scales of seconds to (at least) hours, including nulling, subpulse drifting, and mode-changing. Studying pulsars like PSR B0823+26 provides further insight into the relationship between these various emission phenom...

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Main Authors:	Sobey, Charlotte, Young, N., Hessels, J., Weltevrede, P., Noutsos, A., Stappers, B., Kramer, M., Bassa, C., Lyne, A., Kondratiev, V., Hassall, T., Keane, E., Bilous, A., Breton, R., Grießmeier, J., Karastergiou, A., Pilia, M., Serylak, M., Ter Veen, S., Van Leeuwen, J., Alexov, A., Anderson, J., Asgekar, A., Avruch, I., Bell, M., Bentum, M., Bernardi, G., Best, P., Birzan, L., Bonafede, A., Breitling, F., Broderick, J., Brüggen, M., Corstanje, A., Carbone, D., De Geus, E., De Vos, M., Van Duin, A., Duscha, S., Eislöffel, J., Falcke, H., Fallows, R., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M., Gunst, A., Hamaker, J., Heald, G., Hoeft, M., Hörandel, J., Jütte, E., Kuper, G., Maat, P., Mann, G., Markoff, S., McFadden, R., McKay-Bukowski, D., McKean, J., Mulcahy, D., Munk, H., Nelles, A., Norden, M., Orrù, E., Paas, H., Pandey-Pommier, M., Pandey, V., Pietka, G., Pizzo, R., Polatidis, A., Rafferty, D., Renting, A., Röttgering, H., Rowlinson, A., Scaife, A., Schwarz, D., Sluman, J., Smirnov, O., Steinmetz, M., Stewart, A., Swinbank, J., Tagger, M.
Format:	Journal Article
Published:	Oxford University Press 2015
Online Access:	http://hdl.handle.net/20.500.11937/52473

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author	Sobey, Charlotte Young, N. Hessels, J. Weltevrede, P. Noutsos, A. Stappers, B. Kramer, M. Bassa, C. Lyne, A. Kondratiev, V. Hassall, T. Keane, E. Bilous, A. Breton, R. Grießmeier, J. Karastergiou, A. Pilia, M. Serylak, M. Ter Veen, S. Van Leeuwen, J. Alexov, A. Anderson, J. Asgekar, A. Avruch, I. Bell, M. Bentum, M. Bernardi, G. Best, P. Birzan, L. Bonafede, A. Breitling, F. Broderick, J. Brüggen, M. Corstanje, A. Carbone, D. De Geus, E. De Vos, M. Van Duin, A. Duscha, S. Eislöffel, J. Falcke, H. Fallows, R. Fender, R. Ferrari, C. Frieswijk, W. Garrett, M. Gunst, A. Hamaker, J. Heald, G. Hoeft, M. Hörandel, J. Jütte, E. Kuper, G. Maat, P. Mann, G. Markoff, S. McFadden, R. McKay-Bukowski, D. McKean, J. Mulcahy, D. Munk, H. Nelles, A. Norden, M. Orrù, E. Paas, H. Pandey-Pommier, M. Pandey, V. Pietka, G. Pizzo, R. Polatidis, A. Rafferty, D. Renting, A. Röttgering, H. Rowlinson, A. Scaife, A. Schwarz, D. Sluman, J. Smirnov, O. Steinmetz, M. Stewart, A. Swinbank, J. Tagger, M.
author_facet	Sobey, Charlotte Young, N. Hessels, J. Weltevrede, P. Noutsos, A. Stappers, B. Kramer, M. Bassa, C. Lyne, A. Kondratiev, V. Hassall, T. Keane, E. Bilous, A. Breton, R. Grießmeier, J. Karastergiou, A. Pilia, M. Serylak, M. Ter Veen, S. Van Leeuwen, J. Alexov, A. Anderson, J. Asgekar, A. Avruch, I. Bell, M. Bentum, M. Bernardi, G. Best, P. Birzan, L. Bonafede, A. Breitling, F. Broderick, J. Brüggen, M. Corstanje, A. Carbone, D. De Geus, E. De Vos, M. Van Duin, A. Duscha, S. Eislöffel, J. Falcke, H. Fallows, R. Fender, R. Ferrari, C. Frieswijk, W. Garrett, M. Gunst, A. Hamaker, J. Heald, G. Hoeft, M. Hörandel, J. Jütte, E. Kuper, G. Maat, P. Mann, G. Markoff, S. McFadden, R. McKay-Bukowski, D. McKean, J. Mulcahy, D. Munk, H. Nelles, A. Norden, M. Orrù, E. Paas, H. Pandey-Pommier, M. Pandey, V. Pietka, G. Pizzo, R. Polatidis, A. Rafferty, D. Renting, A. Röttgering, H. Rowlinson, A. Scaife, A. Schwarz, D. Sluman, J. Smirnov, O. Steinmetz, M. Stewart, A. Swinbank, J. Tagger, M.
author_sort	Sobey, Charlotte
building	Curtin Institutional Repository
collection	Online Access
description	PSR B0823+26, a 0.53-s radio pulsar, displays a host of emission phenomena over time-scales of seconds to (at least) hours, including nulling, subpulse drifting, and mode-changing. Studying pulsars like PSR B0823+26 provides further insight into the relationship between these various emission phenomena and what they might teach us about pulsar magnetospheres. Here we report on the LOFAR (Low-Frequency Array) discovery that PSR B0823+26 has a weak and sporadically emitting 'quiet' (Q) emission mode that is over 100 times weaker (on average) and has a nulling fraction forty-times greater than that of the more regularly-emitting 'bright' (B) mode. Previously, the pulsar has been undetected in the Q mode, and was assumed to be nulling continuously. PSR B0823+26 shows a further decrease in average flux just before the transition into the B mode, and perhaps truly turns off completely at these times. Furthermore, simultaneous observations taken with the LOFAR, Westerbork, Lovell, and Effelsberg telescopes between 110 MHz and 2.7 GHz demonstrate that the transition between the Q mode and B mode occurs within one single rotation of the neutron star, and that it is concurrent across the range of frequencies observed. © 2015 The Authors.
first_indexed	2025-11-14T09:51:53Z
format	Journal Article
id	curtin-20.500.11937-52473
institution	Curtin University Malaysia
institution_category	Local University
last_indexed	2025-11-14T09:51:53Z
publishDate	2015
publisher	Oxford University Press
recordtype	eprints
repository_type	Digital Repository
spelling	curtin-20.500.11937-524732018-03-29T09:09:02Z LOFAR discovery of a quiet emission mode in PSR B0823+26 Sobey, Charlotte Young, N. Hessels, J. Weltevrede, P. Noutsos, A. Stappers, B. Kramer, M. Bassa, C. Lyne, A. Kondratiev, V. Hassall, T. Keane, E. Bilous, A. Breton, R. Grießmeier, J. Karastergiou, A. Pilia, M. Serylak, M. Ter Veen, S. Van Leeuwen, J. Alexov, A. Anderson, J. Asgekar, A. Avruch, I. Bell, M. Bentum, M. Bernardi, G. Best, P. Birzan, L. Bonafede, A. Breitling, F. Broderick, J. Brüggen, M. Corstanje, A. Carbone, D. De Geus, E. De Vos, M. Van Duin, A. Duscha, S. Eislöffel, J. Falcke, H. Fallows, R. Fender, R. Ferrari, C. Frieswijk, W. Garrett, M. Gunst, A. Hamaker, J. Heald, G. Hoeft, M. Hörandel, J. Jütte, E. Kuper, G. Maat, P. Mann, G. Markoff, S. McFadden, R. McKay-Bukowski, D. McKean, J. Mulcahy, D. Munk, H. Nelles, A. Norden, M. Orrù, E. Paas, H. Pandey-Pommier, M. Pandey, V. Pietka, G. Pizzo, R. Polatidis, A. Rafferty, D. Renting, A. Röttgering, H. Rowlinson, A. Scaife, A. Schwarz, D. Sluman, J. Smirnov, O. Steinmetz, M. Stewart, A. Swinbank, J. Tagger, M. PSR B0823+26, a 0.53-s radio pulsar, displays a host of emission phenomena over time-scales of seconds to (at least) hours, including nulling, subpulse drifting, and mode-changing. Studying pulsars like PSR B0823+26 provides further insight into the relationship between these various emission phenomena and what they might teach us about pulsar magnetospheres. Here we report on the LOFAR (Low-Frequency Array) discovery that PSR B0823+26 has a weak and sporadically emitting 'quiet' (Q) emission mode that is over 100 times weaker (on average) and has a nulling fraction forty-times greater than that of the more regularly-emitting 'bright' (B) mode. Previously, the pulsar has been undetected in the Q mode, and was assumed to be nulling continuously. PSR B0823+26 shows a further decrease in average flux just before the transition into the B mode, and perhaps truly turns off completely at these times. Furthermore, simultaneous observations taken with the LOFAR, Westerbork, Lovell, and Effelsberg telescopes between 110 MHz and 2.7 GHz demonstrate that the transition between the Q mode and B mode occurs within one single rotation of the neutron star, and that it is concurrent across the range of frequencies observed. © 2015 The Authors. 2015 Journal Article http://hdl.handle.net/20.500.11937/52473 10.1093/mnras/stv1066 Oxford University Press restricted
spellingShingle	Sobey, Charlotte Young, N. Hessels, J. Weltevrede, P. Noutsos, A. Stappers, B. Kramer, M. Bassa, C. Lyne, A. Kondratiev, V. Hassall, T. Keane, E. Bilous, A. Breton, R. Grießmeier, J. Karastergiou, A. Pilia, M. Serylak, M. Ter Veen, S. Van Leeuwen, J. Alexov, A. Anderson, J. Asgekar, A. Avruch, I. Bell, M. Bentum, M. Bernardi, G. Best, P. Birzan, L. Bonafede, A. Breitling, F. Broderick, J. Brüggen, M. Corstanje, A. Carbone, D. De Geus, E. De Vos, M. Van Duin, A. Duscha, S. Eislöffel, J. Falcke, H. Fallows, R. Fender, R. Ferrari, C. Frieswijk, W. Garrett, M. Gunst, A. Hamaker, J. Heald, G. Hoeft, M. Hörandel, J. Jütte, E. Kuper, G. Maat, P. Mann, G. Markoff, S. McFadden, R. McKay-Bukowski, D. McKean, J. Mulcahy, D. Munk, H. Nelles, A. Norden, M. Orrù, E. Paas, H. Pandey-Pommier, M. Pandey, V. Pietka, G. Pizzo, R. Polatidis, A. Rafferty, D. Renting, A. Röttgering, H. Rowlinson, A. Scaife, A. Schwarz, D. Sluman, J. Smirnov, O. Steinmetz, M. Stewart, A. Swinbank, J. Tagger, M. LOFAR discovery of a quiet emission mode in PSR B0823+26
title	LOFAR discovery of a quiet emission mode in PSR B0823+26
title_full	LOFAR discovery of a quiet emission mode in PSR B0823+26
title_fullStr	LOFAR discovery of a quiet emission mode in PSR B0823+26
title_full_unstemmed	LOFAR discovery of a quiet emission mode in PSR B0823+26
title_short	LOFAR discovery of a quiet emission mode in PSR B0823+26
title_sort	lofar discovery of a quiet emission mode in psr b0823+26
url	http://hdl.handle.net/20.500.11937/52473

LOFAR discovery of a quiet emission mode in PSR B0823+26

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