当前位置： 文档下载 > 所有分类 > NGC6822 detection of variable stars with ISIS2.1Preliminary results on the detection of a conspicuous number of variable stars in the dwarf irregular galaxy NGC 6822 are presented. We stress the need for packages specifically designed to the search of variables in distant galaxies and/or when data are a
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aL.Baldacci1,2,G.Clementini2,E.V.Held3andL.Rizzi3,41Universit`adiBologna,viaRanzani1,40127Bologna,Italy2INAF-OsservatorioAstronomicodiBologna,viaRanzani1,40127Bologna,Italy3INAF-OsservatorioAstronomicodiPadova,vicolodell’Osservatorio5,35122Padova,Italy4Universit`adiPadova,vicolodell’Osservatorio2,35122Padova,ItalyAbstract.PreliminaryresultsonthedetectionofaconspicuousnumberofvariablestarsinthedwarfirregulargalaxyNGC6822arepresented.Westresstheneedforpackagesspeci callydesignedtothesearchofvariablesindistantgalaxiesand/orwhendataarea ectedbyahighlevelofcrowding.Keywords.Variablestars–LocalGroupGalaxies–NGC68221.IntroductionVariabilityinvolvesmanyphasesofstellarevolution:variablestarsarebothtracersofstellarpopulationsandtestsforstellarevo-lutiontheories.AsapartoftheongoingprogramonthestudyofvariablestarsinLocalGroupGalaxiescarriedoutattheBolognaandPaduaObservatories,wearestudyingthedwarfirregulargalaxyNGC6822.Weob-
tainedtimeseriesobservations(36Vand11B15-minexposuresforatotalof15
hours,spreadon3nights)withtheVery
LargeTelescope(VLT,Paranal-Chile)in
detection of the variable stars with the Image Subtraction method (ISIS2.1...namely: the Large Magellanic Cloud (LMC), Leo I, NGC 6822 and Fornax. ...
免费 NGC6822 detection of var... 4页 免费搜...ed using ISIS2.1 (Alard 2000). About 450 ...variable stars with periods between 0.2 and 0....
NGC6822 detection of var... 4页 免费 Distance ...Variable stars as tracers of stellar populations in...ed using ISIS2.1 (Alard 2000), a package ...
Detection of new variable stars in the SMC cluster...(ISIS, Alard 2000) and the Welch & Stetson (...1. CMD of NGC 121 for stars on the Planetary...
a Variable Star Population in NGC 2808 Table 1....rst detection of a sizeable population of variable...(based on ISIS2.1; Alard 2000) of the ...
of Variable Stars in the Globular Cluster NGC ...(2001) reported the detection with Chandra of 25...Both of them make use of the ISIS-1.2 image...
the Large Magellanic Cloud (LMC), Fornax, Leo I, Phoenix, NGC 6822 and...Variable stars identi?cation has been successfully performed with ISIS2.1 on...
Catalog of Variable Stars in the Globular Cluster...NGC 5139 – RR Lyrae variables, SX Phe variables...extracted using the phot task of the ISIS ...
THE RESOLVED OUTER POPULATION OF NGC6822 WITH WFPC2 J. B. Hutchings1 Dominion...that extends to stars of about 2 M⊙ , with an age of about 200 M...
(Bright) Variable Stars in Galactic Globular ...as an example, the case of M3 (NGC 5272), ...ISIS (detection, light curves in relative ?uxes...
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