One year of finding new radio pulsars with
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1 One year of finding new radio pulsars with Benjamin Knispel flux density (mjy) w 50 = 0.06P 0 = 1.3ms pulse phase (turns)
2 One year of finding new radio pulsars with Benjamin Knispel flux density (mjy) w 50 = 0.06P 0 = 1.3ms pulse phase (turns)
3 numbers» 300,000 volunteers, 50,000 active computers» ~200 TFlop/s sustained computing power» servers in Milwaukee and Hannover science goals:» search for continuous gravitational waves (CPU)» search for tight binary radio pulsars (CPU+GPU)» search for gamma-ray pulsars (CPU) science results so far:» upper limits for continuous GWs (2 publications)» 2 new pulsars in Arecibo data (2 publications)» 6 new pulsars in Parkes data (stay tuned )
4 Radio pulsars neutron stars = stellar remnants (supernova)» high density: ~1.4 Msun at 20 km diameter» strong gravity: RSchwarzschild = 0.3 RNS» strong fields: 10 8 to G radio pulsars» pulsed broadband radio emission ( lighthouse )» serendipitously discovered in 1967» today ~1900 known, 8% in binary systems searches» unknown distance» unknown spin frequency» unknown binary parameters
5 Radio pulsars neutron stars = stellar remnants (supernova)» high density: ~1.4 Msun at 20 km diameter» strong gravity: RSchwarzschild = 0.3 RNS» strong fields: 10 8 to G radio pulsars rotation» pulsed broadband radio emission ( lighthouse )» serendipitously discovered in 1967» today ~1900 known, 8% in binary systems searches neutron star field lines» unknown distance radio beam» unknown spin frequency» unknown binary parameters
6 Radio pulsars neutron stars = stellar remnants (supernova)» high density: ~1.4 Msun at 20 km diameter» strong gravity: RSchwarzschild = 0.3 RNS» strong fields: 10 8 to G radio pulsars rotation» pulsed broadband radio emission ( lighthouse )» serendipitously discovered in 1967» today ~1900 known, 8% in binary systems searches neutron star field lines» unknown distance radio beam» unknown spin frequency» unknown binary parameters
7 Radio pulsars neutron stars = stellar remnants (supernova)» high density: ~1.4 Msun at 20 km diameter» strong gravity: RSchwarzschild = 0.3 RNS» strong fields: 10 8 to G radio pulsars rotation» pulsed broadband radio emission ( lighthouse )» serendipitously discovered in 1967» today ~1900 known, 8% in binary systems searches neutron star field lines» unknown distance radio beam» unknown spin frequency» unknown binary parameters
8 Radio pulsars neutron stars = stellar remnants (supernova)» high density: ~1.4 Msun at 20 km diameter» strong gravity: RSchwarzschild = 0.3 RNS» strong fields: 10 8 to G radio pulsars rotation» pulsed broadband radio emission ( lighthouse )» serendipitously discovered in 1967» today ~1900 known, 8% in binary systems searches» unknown distance E@H servers» unknown spin frequency» unknown binary parameters radio beam neutron star field lines
9 Radio pulsars neutron stars = stellar remnants (supernova)» high density: ~1.4 Msun at 20 km diameter» strong gravity: RSchwarzschild = 0.3 RNS» strong fields: 10 8 to G radio pulsars rotation» pulsed broadband radio emission ( lighthouse )» serendipitously discovered in 1967» today ~1900 known, 8% in binary systems searches» unknown distance E@H servers» unknown spin frequency } E@H hosts» unknown binary parameters radio beam neutron star field lines
10 Radio pulsar runs Arecibo telescope, Puerto Rico (305 m)» with PALFA collaboration Parkes telescope, Australia, NSW (64 m)» data public, collaboration with MPIfR, Bonn ABP1 (March March 2010)» first run using Arecibo data (130 TB, ) Wikimedia Commons ABP2 (March Dec 2010)» improved run on Arecibo data (faster apps) BRP3 (Dec Jul 2011)» re-analysis of PMPS (4 TB from ) BRP4 (started late Jul 2011) Wikimedia Commons» run on new, better Arecibo data (44 TB since 2009)
11 First discoveries in 2010 Found two new pulsars within two weeks» J on July 11, 2010» J on July 26, 2010 J » pulsar that should have (had) a companion» companion likely ejected by its supernova, 13 th system of this class J » massive white dwarf companion, 6 th system of this class ever found pulsar P0 (ms) d (kpc) volunteers notes profile J The Colvins / Powermandg Robert C. Tautz / Myat DRP J Vit-MIPT / staceman IMBP
12 First discoveries in 2010 Found two new pulsars within two weeks» J on July 11, 2010» J on July 26, 2010 J J » pulsar that should have (had) a companion» companion likely ejected by its supernova, 13 th system of this class J » massive white dwarf companion, 6 th system of this class ever found pulsar P0 (ms) d (kpc) volunteers notes profile J The Colvins / Powermandg Robert C. Tautz / Myat DRP J Vit-MIPT / staceman IMBP
13 More discoveries in 2011 Re-analysis of the Parkes Multibeam Pulsar Survey» 3 rd re-analysis, first fully coherent binary search (Tobs=35 min)» 6 new pulsars confirmed + more good candidates pulsar P0 (ms) d (kpc) volunteers notes profile J Vadim Gusev / David intermittent J Arax / UW-Madison CAE J Jesse Charles Wagner II [USA] / Ras J J J Omega Sector - Game Systems / Dwaine revoluzzer / Jacek Richter Jaska / Family cjsturgess / Companion_Cube terrydudley / nemo Trey / nemo in 3 beams intermittent binary pulsar
14 Present and future Run on new Arecibo data» already new pulsars found in these data (not more discoveries likely (also Search for radio-quite gamma-ray pulsars in NASA s Fermi LAT data» exciting new field of astronomy Wikimedia Commons» already gamma-ray pulsars found in these data» more discoveries likely» first radio-quite MSP yet to be found (E@H?)» running now on E@H (currently CPU only) Current surveys with Parkes / Effelsberg telescope» analyse data on Einstein@Home in the future
15 to more pulsar discoveries! flux density (mjy) w 50 = 0.06P 0 = 1.3ms pulse phase (turns)
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