Theoretical astrophysics and plasma physics at RPC

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The Population of Viscosity- and Gravitational Wave-Driven Supermassive Black Hole Binaries Among Luminous AGN

(2009)

Authors:

Zoltán Haiman, Bence Kocsis, Kristen Menou
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The M-sigma and M-L Relations in Galactic Bulges and Determinations of their Intrinsic Scatter

(2009)

Authors:

Kayhan Gultekin, Douglas O Richstone, Karl Gebhardt, Tod R Lauer, Scott Tremaine, MC Aller, Ralf Bender, Alan Dressler, SM Faber, Alexei V Filippenko, Richard Green, Luis C Ho, John Kormendy, John Magorrian, Jason Pinkney, Christos Siopis
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All-sky LIGO search for periodic gravitational waves in the early fifth-science-run data.

Phys Rev Lett 102:11 (2009) 111102

Authors:

BP Abbott, R Abbott, R Adhikari, P Ajith, B Allen, G Allen, RS Amin, SB Anderson, WG Anderson, MA Arain, M Araya, H Armandula, P Armor, Y Aso, S Aston, P Aufmuth, C Aulbert, S Babak, P Baker, S Ballmer, H Bantilan, BC Barish, C Barker, D Barker, B Barr, P Barriga, L Barsotti, MA Barton, I Bartos, R Bassiri, M Bastarrika, B Behnke, M Benacquista, J Betzwieser, PT Beyersdorf, IA Bilenko, G Billingsley, R Biswas, E Black, JK Blackburn, L Blackburn, D Blair, B Bland, TP Bodiya, L Bogue, R Bork, V Boschi, S Bose, PR Brady, VB Braginsky, JE Brau, M Brinkmann, AF Brooks, DA Brown, G Brunet, A Bullington, A Buonanno, O Burmeister, RL Byer, L Cadonati, G Cagnoli, JB Camp, J Cannizzo, KC Cannon, J Cao, L Cardenas, V Cardoso, S Caride, T Casebolt, G Castaldi, S Caudill, M Cavaglià, C Cepeda, E Chalkley, P Charlton, S Chatterji, S Chelkowski, Y Chen, N Christensen, D Clark, J Clark, JH Clayton, T Cokelaer, R Conte, D Cook, TRC Corbitt, N Cornish, DC Coyne, JDE Creighton, TD Creighton, AM Cruise, A Cumming, L Cunningham, RM Cutler, K Danzmann, B Daudert, G Davies, D Debra, J Degallaix, V Dergachev, S Desai, R Desalvo, S Dhurandhar, M Díaz, J Dickson, A Dietz, F Donovan, KL Dooley, EE Doomes, RWP Drever, I Duke, J-C Dumas, J Dwyer, C Echols, M Edgar, A Effler, P Ehrens, G Ely, E Espinoza, T Etzel, M Evans, T Evans, S Fairhurst, Y Faltas, Y Fan, D Fazi, MM Fejer, LS Finn, K Flasch, S Foley, C Forrest, N Fotopoulos, A Franzen, Z Frei, A Freise, R Frey, TT Fricke, P Fritschel, VV Frolov, M Fyffe, JA Garofoli, I Gholami, JA Giaime, S Giampanis, KD Giardina, K Goda, E Goetz, LM Goggin, G González, S Gossler, R Gouaty, A Grant, S Gras, C Gray, M Gray, RJS Greenhalgh, AM Gretarsson, F Grimaldi, R Grosso, H Grote, S Grunewald, M Guenther, EK Gustafson, R Gustafson, B Hage, JM Hallam, C Hanna, J Hanson, J Harms, GM Harry, ED Harstad, E Haughian, K Hayama, T Hayler, J Heefner, IS Heng, A Heptonstall, M Hewitson, S Hild, E Hirose, D Hoak, K Holt, D Hosken, J Hough, SH Huttner, D Ingram, M Ito, A Ivanov, B Johnson, WW Johnson, DI Jones, G Jones, R Jones, L Ju, P Kalmus, V Kalogera, S Kamat, J Kanner, D Kasprzyk, E Katsavounidis, K Kawabe, S Kawamura, F Kawazoe, W Kells, DG Keppel, A Khalaidovski, F Ya Khalili, R Khan, E Khazanov, P King, JS Kissel, S Klimenko, B Kocsis, K Kokeyama, V Kondrashov, R Kopparapu, S Koranda, D Kozak, I Kozhevatov, B Krishnan, P Kwee, M Landry, B Lantz, A Lazzarini, M Lei, I Leonor, C Li, H Lin, PE Lindquist, TB Littenberg, NA Lockerbie, D Lodhia, M Lormand, P Lu, M Lubinski, A Lucianetti, H Lück, B Machenschalk, M Macinnis, M Mageswaran, K Mailand, I Mandel, V Mandic, S Márka, Z Márka, A Markosyan, J Markowitz, E Maros, IW Martin, RM Martin, JN Marx, K Mason, F Matichard, L Matone, R Matzner, N Mavalvala, R McCarthy, DE McClelland, SC McGuire, M McHugh, G McIntyre, D McKechan, K McKenzie, M Mehmet, A Melissinos, G Mendell, RA Mercer, S Meshkov, CJ Messenger, D Meyers, A Miller, J Miller, J Minelli, S Mitra, VP Mitrofanov, G Mitselmakher, R Mittleman, O Miyakawa, B Moe, SD Mohanty, G Moreno, K Mors, K Mossavi, C Mowlowry, G Mueller, D Muhammad, S Mukherjee, H Mukhopadhyay, A Mullavey, H Müller-Ebhardt, J Munch, PG Murray, E Myers, J Myers, T Nash, J Nelson, G Newton, A Nishizawa, K Numata, E Ochsner, J O'Dell, G Ogin, B O'Reilly, R O'Shaughnessy, DJ Ottaway, RS Ottens, H Overmier, BJ Owen, Y Pan, C Pankow, MA Papa, V Parameshwaraiah, P Patel, M Pedraza, S Penn, A Perraca, T Petrie, IM Pinto, M Pitkin, HJ Pletsch, MV Plissi, F Postiglione, M Principe, R Prix, V Quetschke, FJ Raab, DS Rabeling, H Radkins, P Raffai, N Rainer, M Rakhmanov, M Ramsunder, T Reed, H Rehbein, S Reid, DH Reitze, R Riesen, K Riles, B Rivera, NA Robertson, C Robinson, EL Robinson, S Roddy, AM Rogan, J Rollins, JD Romano, JH Romie, S Rowan, A Rüdiger, L Ruet, P Russell, K Ryan, S Sakata, L Sancho de la Jordana, V Sandberg, V Sannibale, L Santamaria, S Saraf, P Sarin, BS Sathyaprakash, S Sato, PR Saulson, R Savage, P Savov, M Scanlan, SW Schediwy, R Schilling, R Schnabel, R Schofield, BF Schutz, P Schwinberg, J Scott, SM Scott, AC Searle, B Sears, F Seifert, D Sellers, AS Sengupta, A Sergeev, B Shapiro, P Shawhan, DH Shoemaker, A Sibley, X Siemens, D Sigg, S Sinha, AM Sintes, BJJ Slagmolen, J Slutsky, JR Smith, MR Smith, ND Smith, K Somiya, B Sorazu, LC Stein, KA Strain, A Stuver, TZ Summerscales, K-X Sun, M Sung, PJ Sutton, H Takahashi, DB Tanner, R Taylor, R Taylor, J Thacker, KA Thorne, KS Thorne, A Thüring, KV Tokmakov, C Torres, C Torrie, G Traylor, M Trias, D Ugolini, K Urbanek, H Vahlbruch, C Van Den Broeck, MV van der Sluys, AA van Veggel, S Vass, R Vaulin, A Vecchio, JD Veitch, P Veitch, A Villar, C Vorvick, SP Vyachanin, SJ Waldman, L Wallace, H Ward, RL Ward, M Weinert, AJ Weinstein, R Weiss, L Wen, S Wen, K Wette, JT Whelan, SE Whitcomb, BF Whiting, C Wilkinson, PA Willems, HR Williams, L Williams, B Willke, I Wilmut, W Winkler, CC Wipf, AG Wiseman, G Woan, R Wooley, J Worden, W Wu, I Yakushin, H Yamamoto, Z Yan, S Yoshida, M Zanolin, J Zhang, L Zhang, C Zhao, N Zotov, ME Zucker, H Zur Mühlen, J Zweizig, LIGO Scientific Collaboration

Abstract:

We report on an all-sky search with the LIGO detectors for periodic gravitational waves in the frequency range 50-1100 Hz and with the frequency's time derivative in the range -5 x 10{-9}-0 Hz s{-1}. Data from the first eight months of the fifth LIGO science run (S5) have been used in this search, which is based on a semicoherent method (PowerFlux) of summing strain power. Observing no evidence of periodic gravitational radiation, we report 95% confidence-level upper limits on radiation emitted by any unknown isolated rotating neutron stars within the search range. Strain limits below 10{-24} are obtained over a 200-Hz band, and the sensitivity improvement over previous searches increases the spatial volume sampled by an average factor of about 100 over the entire search band. For a neutron star with nominal equatorial ellipticity of 10{-6}, the search is sensitive to distances as great as 500 pc.
More details from the publisher

All-sky LIGO search for periodic gravitational waves in the early fifth-science-run data.

Physical review letters 102:11 (2009) 111102

Authors:

BP Abbott, R Abbott, R Adhikari, P Ajith, B Allen, G Allen, RS Amin, SB Anderson, WG Anderson, MA Arain, M Araya, H Armandula, P Armor, Y Aso, S Aston, P Aufmuth, C Aulbert, S Babak, P Baker, S Ballmer, H Bantilan, BC Barish, C Barker, D Barker, B Barr, P Barriga, L Barsotti, MA Barton, I Bartos, R Bassiri, M Bastarrika, B Behnke, M Benacquista, J Betzwieser, PT Beyersdorf, IA Bilenko, G Billingsley, R Biswas, E Black, JK Blackburn, L Blackburn, D Blair, B Bland, TP Bodiya, L Bogue, R Bork, V Boschi, S Bose, PR Brady, VB Braginsky, JE Brau, M Brinkmann, AF Brooks, DA Brown, G Brunet, A Bullington, A Buonanno, O Burmeister, RL Byer, L Cadonati, G Cagnoli, JB Camp, J Cannizzo, KC Cannon, J Cao, L Cardenas, V Cardoso, S Caride, T Casebolt, G Castaldi, S Caudill, M Cavaglià, C Cepeda, E Chalkley, P Charlton, S Chatterji, S Chelkowski, Y Chen, N Christensen, D Clark, J Clark, JH Clayton, T Cokelaer, R Conte, D Cook, TRC Corbitt, N Cornish, DC Coyne, JDE Creighton, TD Creighton, AM Cruise, A Cumming, L Cunningham, RM Cutler, K Danzmann, B Daudert, G Davies, D Debra, J Degallaix, V Dergachev, S Desai, R Desalvo, S Dhurandhar, M Díaz, J Dickson, A Dietz, F Donovan, KL Dooley, EE Doomes, RWP Drever, I Duke, J-C Dumas, J Dwyer, C Echols, M Edgar, A Effler, P Ehrens, G Ely, E Espinoza, T Etzel, M Evans, T Evans, S Fairhurst, Y Faltas, Y Fan, D Fazi, MM Fejer, LS Finn, K Flasch, S Foley, C Forrest, N Fotopoulos, A Franzen, Z Frei, A Freise, R Frey, TT Fricke, P Fritschel, VV Frolov, M Fyffe, JA Garofoli, I Gholami, JA Giaime, S Giampanis, KD Giardina, K Goda, E Goetz, LM Goggin, G González, S Gossler, R Gouaty, A Grant, S Gras, C Gray, M Gray, RJS Greenhalgh, AM Gretarsson, F Grimaldi, R Grosso, H Grote, S Grunewald, M Guenther, EK Gustafson, R Gustafson, B Hage, JM Hallam, C Hanna, J Hanson, J Harms, GM Harry, ED Harstad, E Haughian, K Hayama, T Hayler, J Heefner, IS Heng, A Heptonstall, M Hewitson, S Hild, E Hirose, D Hoak, K Holt, D Hosken, J Hough, SH Huttner, D Ingram, M Ito, A Ivanov, B Johnson, WW Johnson, DI Jones, G Jones, R Jones, L Ju, P Kalmus, V Kalogera, S Kamat, J Kanner, D Kasprzyk, E Katsavounidis, K Kawabe, S Kawamura, F Kawazoe, W Kells, DG Keppel, A Khalaidovski, F Ya Khalili, R Khan, E Khazanov, P King, JS Kissel, S Klimenko, B Kocsis, K Kokeyama, V Kondrashov, R Kopparapu, S Koranda, D Kozak, I Kozhevatov, B Krishnan, P Kwee, M Landry, B Lantz, A Lazzarini, M Lei, I Leonor, C Li, H Lin, PE Lindquist, TB Littenberg, NA Lockerbie, D Lodhia, M Lormand, P Lu, M Lubinski, A Lucianetti, H Lück, B Machenschalk, M Macinnis, M Mageswaran, K Mailand, I Mandel, V Mandic, S Márka, Z Márka, A Markosyan, J Markowitz, E Maros, IW Martin, RM Martin, JN Marx, K Mason, F Matichard, L Matone, R Matzner, N Mavalvala, R McCarthy, DE McClelland, SC McGuire, M McHugh, G McIntyre, D McKechan, K McKenzie, M Mehmet, A Melissinos, G Mendell, RA Mercer, S Meshkov, CJ Messenger, D Meyers, A Miller, J Miller, J Minelli, S Mitra, VP Mitrofanov, G Mitselmakher, R Mittleman, O Miyakawa, B Moe, SD Mohanty, G Moreno, K Mors, K Mossavi, C Mowlowry, G Mueller, D Muhammad, S Mukherjee, H Mukhopadhyay, A Mullavey, H Müller-Ebhardt, J Munch, PG Murray, E Myers, J Myers, T Nash, J Nelson, G Newton, A Nishizawa, K Numata, E Ochsner, J O'Dell, G Ogin, B O'Reilly, R O'Shaughnessy, DJ Ottaway, RS Ottens, H Overmier, BJ Owen, Y Pan, C Pankow, MA Papa, V Parameshwaraiah, P Patel, M Pedraza, S Penn, A Perraca, T Petrie, IM Pinto, M Pitkin, HJ Pletsch, MV Plissi, F Postiglione, M Principe, R Prix, V Quetschke, FJ Raab, DS Rabeling, H Radkins, P Raffai, N Rainer, M Rakhmanov, M Ramsunder, T Reed, H Rehbein, S Reid, DH Reitze, R Riesen, K Riles, B Rivera, NA Robertson, C Robinson, EL Robinson, S Roddy, AM Rogan, J Rollins, JD Romano, JH Romie, S Rowan, A Rüdiger, L Ruet, P Russell, K Ryan, S Sakata, L Sancho de la Jordana, V Sandberg, V Sannibale, L Santamaria, S Saraf, P Sarin, BS Sathyaprakash, S Sato, PR Saulson, R Savage, P Savov, M Scanlan, SW Schediwy, R Schilling, R Schnabel, R Schofield, BF Schutz, P Schwinberg, J Scott, SM Scott, AC Searle, B Sears, F Seifert, D Sellers, AS Sengupta, A Sergeev, B Shapiro, P Shawhan, DH Shoemaker, A Sibley, X Siemens, D Sigg, S Sinha, AM Sintes, BJJ Slagmolen, J Slutsky, JR Smith, MR Smith, ND Smith, K Somiya, B Sorazu, LC Stein, KA Strain, A Stuver, TZ Summerscales, K-X Sun, M Sung, PJ Sutton, H Takahashi, DB Tanner, R Taylor, R Taylor, J Thacker, KA Thorne, KS Thorne, A Thüring, KV Tokmakov, C Torres, C Torrie, G Traylor, M Trias, D Ugolini, K Urbanek, H Vahlbruch, C Van Den Broeck, MV van der Sluys, AA van Veggel, S Vass, R Vaulin, A Vecchio, JD Veitch, P Veitch, A Villar, C Vorvick, SP Vyachanin, SJ Waldman, L Wallace, H Ward, RL Ward, M Weinert, AJ Weinstein, R Weiss, L Wen, S Wen, K Wette, JT Whelan, SE Whitcomb, BF Whiting, C Wilkinson, PA Willems, HR Williams, L Williams, B Willke, I Wilmut, W Winkler, CC Wipf, AG Wiseman, G Woan, R Wooley, J Worden, W Wu, I Yakushin, H Yamamoto, Z Yan, S Yoshida, M Zanolin, J Zhang, L Zhang, C Zhao, N Zotov, ME Zucker, H Zur Mühlen, J Zweizig, LIGO Scientific Collaboration

Abstract:

We report on an all-sky search with the LIGO detectors for periodic gravitational waves in the frequency range 50-1100 Hz and with the frequency's time derivative in the range -5 x 10{-9}-0 Hz s{-1}. Data from the first eight months of the fifth LIGO science run (S5) have been used in this search, which is based on a semicoherent method (PowerFlux) of summing strain power. Observing no evidence of periodic gravitational radiation, we report 95% confidence-level upper limits on radiation emitted by any unknown isolated rotating neutron stars within the search range. Strain limits below 10{-24} are obtained over a 200-Hz band, and the sensitivity improvement over previous searches increases the spatial volume sampled by an average factor of about 100 over the entire search band. For a neutron star with nominal equatorial ellipticity of 10{-6}, the search is sensitive to distances as great as 500 pc.
More details from the publisher
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Do high-velocity clouds form by thermal instability?

ArXiv 0902.4525 (2009)

Authors:

J Binney, C Nipoti, F Fraternali

Abstract:

We examine the proposal that the HI "high-velocity" clouds (HVCs) surrounding the Milky Way and other disc galaxies form by condensation of the hot galactic corona via thermal instability. Under the assumption that the galactic corona is well represented by a non-rotating, stratified atmosphere, we find that for this formation mechanism to work the corona must have an almost perfectly flat entropy profile. In all other cases the growth of thermal perturbations is suppressed by a combination of buoyancy and thermal conduction. Even if the entropy profile were nearly flat, cold clouds with sizes smaller than 10 kpc could form in the corona of the Milky Way only at radii larger than 100 kpc, in contradiction with the determined distances of the largest HVC complexes. Clouds with sizes of a few kpc can form in the inner halo only in low-mass systems. We conclude that unless even slow rotation qualitatively changes the dynamics of a corona, thermal instability is unlikely to be a viable mechanism for formation of cold clouds around disc galaxies.
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