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Date and Time of the Query: 2019-03-26 T05:19:58 PDT
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For refcode 2013AJ....146...67B:
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2013AJ....146...67B An STIS Atlas of Ca II Triplet Absorption Line Kinematics in Galactic Nuclei Batcheldor, D.; Axon, D.; Valluri, M.; Mandalou, J.; Merritt, D. Abstract. The relations observed between supermassive black holes and their host galaxies suggest a fundamental link in the processes that cause these two objects to evolve. A more comprehensive understanding of these relations could be gained by increasing the number of supermassive black hole mass (M_blackhole_) measurements. This can be achieved, in part, by continuing to model the stellar dynamics at the centers of galactic bulges using data of the highest possible spatial resolution. Consequently, we present here an atlas of galaxies in the Space Telescope Imaging Spectrograph (STIS) data archive that may have spectra suitable for new M_blackhole_ estimates. Archived STIS G750M data for all non-barred galactic bulges are co-aligned and combined, where appropriate, and the radial signal-to-noise ratios calculated. The line-of-sight velocity distributions from the Ca II triplet are then determined using a maximum penalized likelihood method. We find 19 out of 42 galaxies may provide useful new M_blackhole_ estimates since they are found to have data that is comparable in quality with data that has been used in the past to estimate M_blackhole_. However, we find no relation between the signal-to-noise ratio in the previously analyzed spectra and the uncertainties of the black hole masses derived from the spectra. We also find that there is a very limited number of appropriately observed stellar templates in the archive from which to estimate the effects of template mismatching. Based on observations made with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. Key words: catalogs, galaxies: bulges, stars: kinematics and dynamics
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