The 67 HZ Feature in the Black Hole Candidate GRS 1915+105 as a Possible ``Diskoseismic'' Mode. Nowak, M. A., Wagoner, R. V., Begelman, M. C., & Lehr, D. E. The Astrophysical Journal Letters, 477:L91–L94, March, 1997. ![The 67 HZ Feature in the Black Hole Candidate GRS 1915+105 as a Possible ``Diskoseismic'' Mode [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex The Rossi X-Ray Timing Explorer has made feasible for the first time the search for high-frequency (\textgreater~100 Hz) periodic features in black hole candidate (BHC) systems. Such a feature, with a 67 Hz frequency, recently has been discovered in the BHC GRS 1915+105 (Morgan, Remillard, & Greiner). This feature is weak (rms variability ~0.3%-1.6%), stable in frequency (to within ~2 Hz) despite appreciable luminosity fluctuations, and narrow (quality factor Q ~ 20). Several of these properties are what one expects for a ``diskoseismic'' g-mode in an accretion disk about a 10.6 Msolar (nonrotating) to 36.3 Msolar (maximally rotating) black hole (if we are observing the fundamental-mode frequency). We explore this possibility by considering the expected luminosity modulation, as well as possible excitation and growth mechanisms–including turbulent excitation, damping, and ``negative'' radiation damping. We conclude that a diskoseismic interpretation of the observations is viable.
@article{nowak67HZFeature1997,
title = {The 67 {HZ} {Feature} in the {Black} {Hole} {Candidate} {GRS} 1915+105 as a {Possible} ``{Diskoseismic}'' {Mode}},
volume = {477},
issn = {0004-637X},
url = {http://adsabs.harvard.edu/abs/1997ApJ...477L..91N},
doi = {10.1086/310534},
abstract = {The Rossi X-Ray Timing Explorer has made feasible for the first time the
search for high-frequency ({\textgreater}{\textasciitilde}100 Hz) periodic features in black hole
candidate (BHC) systems. Such a feature, with a 67 Hz frequency,
recently has been discovered in the BHC GRS 1915+105 (Morgan, Remillard,
\& Greiner). This feature is weak (rms variability {\textasciitilde}0.3\%-1.6\%),
stable in frequency (to within {\textasciitilde}2 Hz) despite appreciable luminosity
fluctuations, and narrow (quality factor Q {\textasciitilde} 20). Several of these
properties are what one expects for a ``diskoseismic'' g-mode in an
accretion disk about a 10.6 Msolar (nonrotating) to 36.3
Msolar (maximally rotating) black hole (if we are observing
the fundamental-mode frequency). We explore this possibility by
considering the expected luminosity modulation, as well as possible
excitation and growth mechanisms--including turbulent excitation,
damping, and ``negative'' radiation damping. We conclude that a
diskoseismic interpretation of the observations is viable.},
urldate = {2021-01-18},
journal = {The Astrophysical Journal Letters},
author = {Nowak, Michael A. and Wagoner, Robert V. and Begelman, Mitchell C. and Lehr, Dana E.},
month = mar,
year = {1997},
keywords = {BLACK HOLE PHYSICS, Black Hole Physics, X-RAYS: STARS, X-Rays: Stars},
pages = {L91--L94},
}
Downloads: 0
{"_id":"GbPnipwaeoE7jM7LT","bibbaseid":"nowak-wagoner-begelman-lehr-the67hzfeatureintheblackholecandidategrs1915105asapossiblediskoseismicmode-1997","author_short":["Nowak, M. A.","Wagoner, R. V.","Begelman, M. C.","Lehr, D. E."],"bibdata":{"bibtype":"article","type":"article","title":"The 67 HZ Feature in the Black Hole Candidate GRS 1915+105 as a Possible ``Diskoseismic'' Mode","volume":"477","issn":"0004-637X","url":"http://adsabs.harvard.edu/abs/1997ApJ...477L..91N","doi":"10.1086/310534","abstract":"The Rossi X-Ray Timing Explorer has made feasible for the first time the search for high-frequency (\\textgreater~100 Hz) periodic features in black hole candidate (BHC) systems. Such a feature, with a 67 Hz frequency, recently has been discovered in the BHC GRS 1915+105 (Morgan, Remillard, & Greiner). This feature is weak (rms variability ~0.3%-1.6%), stable in frequency (to within ~2 Hz) despite appreciable luminosity fluctuations, and narrow (quality factor Q ~ 20). Several of these properties are what one expects for a ``diskoseismic'' g-mode in an accretion disk about a 10.6 Msolar (nonrotating) to 36.3 Msolar (maximally rotating) black hole (if we are observing the fundamental-mode frequency). We explore this possibility by considering the expected luminosity modulation, as well as possible excitation and growth mechanisms–including turbulent excitation, damping, and ``negative'' radiation damping. We conclude that a diskoseismic interpretation of the observations is viable.","urldate":"2021-01-18","journal":"The Astrophysical Journal Letters","author":[{"propositions":[],"lastnames":["Nowak"],"firstnames":["Michael","A."],"suffixes":[]},{"propositions":[],"lastnames":["Wagoner"],"firstnames":["Robert","V."],"suffixes":[]},{"propositions":[],"lastnames":["Begelman"],"firstnames":["Mitchell","C."],"suffixes":[]},{"propositions":[],"lastnames":["Lehr"],"firstnames":["Dana","E."],"suffixes":[]}],"month":"March","year":"1997","keywords":"BLACK HOLE PHYSICS, Black Hole Physics, X-RAYS: STARS, X-Rays: Stars","pages":"L91–L94","bibtex":"@article{nowak67HZFeature1997,\n\ttitle = {The 67 {HZ} {Feature} in the {Black} {Hole} {Candidate} {GRS} 1915+105 as a {Possible} ``{Diskoseismic}'' {Mode}},\n\tvolume = {477},\n\tissn = {0004-637X},\n\turl = {http://adsabs.harvard.edu/abs/1997ApJ...477L..91N},\n\tdoi = {10.1086/310534},\n\tabstract = {The Rossi X-Ray Timing Explorer has made feasible for the first time the \nsearch for high-frequency ({\\textgreater}{\\textasciitilde}100 Hz) periodic features in black hole\ncandidate (BHC) systems. Such a feature, with a 67 Hz frequency,\nrecently has been discovered in the BHC GRS 1915+105 (Morgan, Remillard,\n\\& Greiner). This feature is weak (rms variability {\\textasciitilde}0.3\\%-1.6\\%),\nstable in frequency (to within {\\textasciitilde}2 Hz) despite appreciable luminosity\nfluctuations, and narrow (quality factor Q {\\textasciitilde} 20). Several of these\nproperties are what one expects for a ``diskoseismic'' g-mode in an\naccretion disk about a 10.6 Msolar (nonrotating) to 36.3\nMsolar (maximally rotating) black hole (if we are observing\nthe fundamental-mode frequency). We explore this possibility by\nconsidering the expected luminosity modulation, as well as possible\nexcitation and growth mechanisms--including turbulent excitation,\ndamping, and ``negative'' radiation damping. We conclude that a\ndiskoseismic interpretation of the observations is viable.},\n\turldate = {2021-01-18},\n\tjournal = {The Astrophysical Journal Letters},\n\tauthor = {Nowak, Michael A. and Wagoner, Robert V. and Begelman, Mitchell C. and Lehr, Dana E.},\n\tmonth = mar,\n\tyear = {1997},\n\tkeywords = {BLACK HOLE PHYSICS, Black Hole Physics, X-RAYS: STARS, X-Rays: Stars},\n\tpages = {L91--L94},\n}\n\n","author_short":["Nowak, M. A.","Wagoner, R. V.","Begelman, M. C.","Lehr, D. E."],"key":"nowak67HZFeature1997","id":"nowak67HZFeature1997","bibbaseid":"nowak-wagoner-begelman-lehr-the67hzfeatureintheblackholecandidategrs1915105asapossiblediskoseismicmode-1997","role":"author","urls":{"Paper":"http://adsabs.harvard.edu/abs/1997ApJ...477L..91N"},"keyword":["BLACK HOLE PHYSICS","Black Hole Physics","X-RAYS: STARS","X-Rays: Stars"],"metadata":{"authorlinks":{}},"html":""},"bibtype":"article","biburl":"https://bibbase.org/zotero/valepeirano","dataSources":["ftqMNtyNjLWewoxW9"],"keywords":["black hole physics","black hole physics","x-rays: stars","x-rays: stars"],"search_terms":["feature","black","hole","candidate","grs","1915","105","possible","diskoseismic","mode","nowak","wagoner","begelman","lehr"],"title":"The 67 HZ Feature in the Black Hole Candidate GRS 1915+105 as a Possible ``Diskoseismic'' Mode","year":1997}