mass black hole? - Nora Lützgendorf
mass black hole? - Nora Lützgendorf
mass black hole? - Nora Lützgendorf
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Does the globular clusterNGC 6388 host an intermediate<strong>mass</strong><strong>black</strong> <strong>hole</strong>?<strong>Nora</strong> <strong>Lützgendorf</strong> - Research Area F Science Day 2010, GarchingM. Kissler-Patig, E. Noyola, B. Jalali, T. de Zeeuw, K. Gebhardt, H. Baumgardt
NGC 6388Gal. Long.Gal. Lat.Distance[Fe/H]MassVelocityDisp.BH-Mass(phot.)(Lanzoni et al. 2007)345.56 ◦◦ Our colormagnitude−6.74diagramfrom HST/10 kpc−0.6 dex2.6 × 10 6 M ⊙5.7 × 10 3 M ⊙ASC databrightnessprofile18.9 km · s −1 Surface(Noyola etal. 2006)<strong>Nora</strong> <strong>Lützgendorf</strong> - Research Area F Science Day, 2010
InstrumentFLAMES = Fiber Large Array Multi Element SpectrographGIRAFFE - Spectrograph<strong>Nora</strong> <strong>Lützgendorf</strong> - Research Area F Science Day, 2010
SpectroscopyCa-Triplet1 arcsecHSTARGUSVelocity<strong>Nora</strong> <strong>Lützgendorf</strong> - Research Area F Science Day, 2010
<strong>Nora</strong> <strong>Lützgendorf</strong> - Research Area F Science Day, 2010Results
ResultsM • =(9± 4) × 10 3 M ⊙<strong>Nora</strong> <strong>Lützgendorf</strong> - Research Area F Science Day, 2010
Conclusions• Integral Field Units are the perfect instruments todetect IMBHs• NGC 6388 shows complicated dynamics at its center➡ Rotation - like signature• BUT: Rising velocity dispersion in the central region• Bestfit of model for M • =(9± 4) × 10 3 M ⊙<strong>Nora</strong> <strong>Lützgendorf</strong> - Research Area F Science Day, 2010
OutlookBIGGER sample ofglobular cluster:‘WETHER...‘‘UNDER WHICHCIRCUMSTANCESDO...‘... GC host IMBHs?<strong>Nora</strong> <strong>Lützgendorf</strong> - Research Area F Science Day, 2010
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