Astrotomography: Indirect Imaging Methods in Observational Astronomy

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H.M.J. Boffin, D. Steeghs, J. Cuypers
Springer Science & Business Media, Oct 23, 2001 - Science - 434 pages
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TheideaforthisbookoriginatedintheLaSillaobservatorywheretwoofthe editorsweredoingphase-resolvedspectroscopyofsomecataclysmicvariable starsusingtheNTT. Werealizedthatalthoughindirectimagingtechniques suchaseclipsemappingandDopplertomographyhadbeenaroundformore thanadecadeandhadprovidedsomeofthemostinterestingdiscoveries, no bookexistedwhichcoveredthesetechniques. Moreover, nocolloquiumhadever beenorganizedspeci?callyonthesetopics. Theimplementationoftomographic methodsinastrophysics, inordertoprobestructuresonangularscalesofmic- arcseconds, startedabout15yearsagowiththedevelopmentoftheeclipsem- pingmethod. Thismethodisabletoreconstructlightdistributionsineclipsing binariesbyexploitingtheregularobscurationofthelightsourcebyoneofthe binarycomponents. Asimilarapproachtoregulariseddata?ttingleadtoa- rietyofrelatedmethodsinordertoresolvelightdistributionsoftheaccretion ?owsinbinaries, thesurfacestructuresofstarsandtheinnerregionsofactive galaxies. Thescienti?coutputofthesemethodsisconsiderableandtheyare increasinglybecomingversatiletoolsforawidecommunityofresearchers. Aspecialisedworkshopseemedhighlydesirable, sowedecidedtoorganise the?rstinternationalworkshoponastrotomography. Theideaofthemeeting, whichtookplaceinBrusselsinearlyJuly2000, wastobringtogetherresearchers sharinganinterestinapplyingindirectimagingmethodsinastronomy, andto comparethemethodsusedindi?erent?elds. Duringthemeeting, alargeamount oftimewasdevotedtoextensivereviewsofthevariousreconstructiontechniques. Inconjunctionwiththereviews, shortcontributedtalkshighlightedrecent- sultsanddevelopments. Duetothesmallnumberofparticipants,60, therewas plentyofopportunityfordiscussionandinteraction. Moreover, wewantedthat theproceedingsofthismeetingcouldbeusedasahandbookonthesemethods. Thereviewerswerethereforeaskedtoprovideextensiveaccountsoftheir?eld. Theproceedingsthusconsistof13reviewsofabout25pageseachaswellas 15contributedtalksof6?8pages. Awiderangeoftopicsarediscussed, mostly onthepropertiesofaccretion?owsinsemi-detachedbinarysystemsconta- ingacompactstellarremnant. Othertopicsincludethesurfaceandmagnetic ?eldstructureofsinglestars, theshockwavesofMirastars, theaccretion?ows aroundblackholesinbinariesandactivegalacticnucleiandthestructureof Algolsystems. Thelargevarietyofsubjectscoveredisaclearillustrationofthe importancethatindirectimagingtechniqueshavegainedinastrophysics. Anew VI generationofopticaltelescopesandspectrographsiscomingon-linewhichwill pushthepossibilitiesofindirectimagingevenfurther. Inconjunctionwiththat, specialisedinstrumentsandprojectsonexistingtelescopeswilldeliverdatasets withhightimeandwavelengthresolutionstailoredforaccuratemapping- periments. Wehopethattheseproceedingswillprovideahelpfuloverviewfor anyresearcherinterestedinsuchtechniques. Withthesamespiritofproducing morethanjustproceedings, wealsoincludealistofsomeusefulresourceson theInternet. Wealsohopethatthewebpageoftheworkshopwillbekeptalive andbecomeausefulreferenceonastrotomography. Wewouldliketothankalltheparticipantsformakingthisworkshopas- cess, andinparticularallthecontributingreviewauthorsforhavinggenerously agreedtocometothemeetingattheirownexpense, andfortheire?ortsin providingabalancedsetofreviewpapers. Manythankstoallthemembersof thelocalorganisingcommitteeforthehardworkbefore, duringandafterthe workshop. TheBrusselsPlanetariumisthankedforprovidinguswithameeting venueandexcellentsupport. WealsowishtothanktheDirectoroftheRoyal ObservatoryofBelgium, Prof. PaulP aquet, forhise?orts. RobHynesprovided uswithasuperb scienti?cimpression ofaninteractingbinarythatfeaturedon theworkshopposterandvariousotherlocations. Finally, wearegratefulfo- nancialsupportfromprojectG. 0265. 97oftheResearchProgrammeoftheFund forScienti?cResearch Flanders(F. W. O. Vlaanderen). Brussels, Southampton, HenriBo?n, November2000 DannySteeghs, JanCuypers Workshopwebpage: http: //www. astro. oma. be/DopplerWorkshop/ Contents DopplerTomography T. R. Marsh. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 MappingthePeculiarBinaryGPCom L. Morales-Rueda, T. R. Marsh, R. C. North. . . . . . . . . . . . . . . . . . . . . . . . . . . 27 H?-EmissionDopplerTomography ofLong-PeriodCataclysmicVariableStars R. C. North, T. R. Marsh, C. K. J. Moran, U. Kolb, R. C. Smith, R. Stehle. . 33 DopplerTomographyoftheDwarfNovaIYUMa duringQuiescence D. J. Rolfe, T. M. C. Abbott, C. A. Haswell. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 SpiralWavesinAccretionDiscs Observations D. Steeghs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 SpiralWavesinAccretionDiscs Theory H. M. J. Bo?n. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 SpiralShocksinanInviscidSimulationofAccretionFlow inaCloseBinarySystem M. Makita, H. Fujiwara, T. Matsuda, H. M. J. Bo?n. . . . . . . . . . . . . . . . . . . . 88 ImagingtheSecondaryStarsinCataclysmicVariables V. S. Dhillon, C. A. Watson. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 StatisticsofIsolatedEmissionSourcesinCataclysmicVariables C. Tappert, R. Hanuschik. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 TomographyofPolars A. Schwope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 TomographyofMagneticAccretionFlows G. Wynn. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155 VIII Contents TheGeometricalCon?gurationofPolars andPossibleReconstructionArtefacts ofEclipseMappingMethods J. Kube. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175 SpotMappinginCoolStars A. CollierCameron. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183 ImagingtheMagneticTopologiesofCoolActiveStars J. -F. Donati. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207 Di?erentialRotationofCloseBinaryStars: ApplicationtoHR1099 P. Petit, J. -F. Donati, G. A. Wade, J. D. Landstreet, J. M. Oliveira, S. L. S. Shorlin, T. A. A. Sigut, A. C. Cameron. . . . . . . . . . . . . . . . . . . . . . . . . . 232 MagneticDopplerImagingofChemicallyPeculiarStars N. Piskunov, O. Kochukhov. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238 StokesImagingoftheAccretionRegion inMagneticCataclysmicVariables S. Potter, E. Romero-Colmenero, D. A. H. Buckley, M. Cropper, P. Hakala. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244 DopplerImagesoftheMDwarfRE1816+541 J. R. Barnes, A. CollierCameron. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252 TheMethodofSpectraDisentangling andItsLinkstoDopplerTomography P. Hadrava. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
 

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Contents

Doppler Tomography
1
Mapping the Peculiar Binary GP Com
27
HαEmission Doppler Tomography of LongPeriod Cataclysmic Variable Stars
33
Doppler Tomography of the Dwarf Nova IY UMa During Quiescence
39
Spiral Waves in Accretion Discs Observations
45
Spiral Waves in Accretion Discs Theory
69
Spiral Shocks in an Inviscid Simulation of Accretion Flow in a Close Binary System
88
Imaging the Secondary Stars in Cataclysmic Variables
94
Stokes Imaging of the Accretion Region in Magnetic Cataclysmic Variables
244
Doppler Images of the M Dwarf RE 1816 +541
252
The Method of Spectra Disentangling and Its Links to Doppler Tomography
261
Fourier Disentangling of Composite Spectra
269
Doppler Tomography of Eclipsing and Noneclipsing Algols
276
Tomography of the Atmosphere of LongPeriod Variable Stars
301
Eclipse Mapping of Accretion Discs
307
Physical Parameter Eclipse Mapping
332

Statistics of Isolated Emission Sources in Cataclysmic Variables
119
Tomography of Polars
127
Tomography of Magnetic Accretion Flows
155
The Geometrical Configuration of Polars and Possible Reconstruction Artefacts of Eclipse Mapping Methods
175
Spot Mapping in Cool Stars
183
Imaging the Magnetic Topologies of Cool Active Stars
207
Application to HR 1099
232
Magnetic Doppler Imaging of Chemically Peculiar Stars
238
Applications of Indirect Imaging Techniques in Xray Binaries
359
Doppler Tomography of XTE J2123058 and Other Neutron Star LMXBs
378
Echo Mapping of Active Galactic Nuclei
386
Mapping the Accretion Flow
416
Object Index
425
Subject Index
428
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