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Browsing by Author "Brodie, Jean"

Browsing by Author "Brodie, Jean"

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  • A 3.5 million Solar masses black hole in the centre of the ultracompact dwarf galaxy fornax UCD3 
    Afanasiev, Anton V.; Chilingarian, Igor V.; Mieske, Steffen; Voggel, Karina T.; Picotti, Arianna; Hilker, Michael; Seth, Anil; Neumayer, Nadine; Frank, Matthias; Romanowsky, Aaron J.; Hau, George; Baumgardt, Holger; Ahn, Christopher; Strader, Jay; den Brok, Mark; McDermid, Richard; Spitler, Lee; Brodie, Jean; Walsh, Jonelle L. (2018)
    The origin of ultracompact dwarfs (UCDs), a class of compact stellar systems discovered two decades ago, still remains a matter of debate. Recent discoveries of central supermassive black holes in UCDs likely inherited ...
  • Constraining the Physical State of the Hot Gas Halos in NGC 4649 and NGC 5846 
    Paggi, Alessandro; Kim, Dong-Woo; Anderson, Craig; Burke, Doug; D'Abrusco, Raffaele; Fabbiano, Giuseppina; Fruscione, Antonella; Gokas, Tara; Lauer, Jen; McCollough, Michael; Morgan, Doug; Mossman, Amy; O'Sullivan, Ewan; Trinchieri, Ginevra; Vrtilek, Saeqa; Pellegrini, Silvia; Romanowsky, Aaron J.; Brodie, Jean (2017)
    We present results of a joint Chandra/XMM-Newton analysis of the early-type galaxies NGC 4649 and NGC 5846 aimed at investigating differences between mass profiles derived from X-ray data and those from optical data, to ...
  • Detection of Supermassive Black Holes in Two Virgo Ultracompact Dwarf Galaxies 
    Ahn, Christopher P.; Seth, Anil C.; den Brok, Mark; Strader, Jay; Baumgardt, Holger; van den Bosch, Remco; Chilingarian, Igor; Frank, Matthias; Hilker, Michael; McDermid, Richard; Mieske, Steffen; Romanowsky, Aaron J.; Spitler, Lee; Brodie, Jean; Neumayer, Nadine; Walsh, Jonelle L. (2017)
    We present the detection of supermassive black holes (BHs) in two Virgo ultracompact dwarf galaxies (UCDs), VUCD3 and M59cO. We use adaptive optics assisted data from the Gemini/NIFS instrument to derive radial velocity ...
  • An Enigmatic Population of Luminous Globular Clusters in a Galaxy Lacking Dark Matter 
    van Dokkum, Pieter; Cohen, Yotam; Danieli, Shany; Kruijssen, J. M. Diederik; Romanowsky, Aaron J.; Merritt, Allison; Abraham, Roberto; Brodie, Jean; Conroy, Charlie; Lokhorst, Deborah; Mowla, Lamiya; O'Sullivan, Ewan; Zhang, Jielai (2018)
    We recently found an ultra diffuse galaxy (UDG) with a half-light radius of R <SUB> e </SUB> = 2.2 kpc and little or no dark matter. The total mass of NGC1052--DF2 was measured from the radial velocities of bright compact ...
  • A galaxy lacking dark matter 
    van Dokkum, Pieter; Danieli, Shany; Cohen, Yotam; Merritt, Allison; Romanowsky, Aaron J.; Abraham, Roberto; Brodie, Jean; Conroy, Charlie; Lokhorst, Deborah; Mowla, Lamiya; O'Sullivan, Ewan; Zhang, Jielai (2018)
    Studies of galaxy surveys in the context of the cold dark matter paradigm have shown that the mass of the dark matter halo and the total stellar mass are coupled through a function that varies smoothly with mass. Their ...
  • NGC 5846-UDG1: A Galaxy Formed Mostly by Star Formation in Massive, Extremely Dense Clumps of Gas 
    Danieli, Shany; van Dokkum, Pieter; Trujillo-Gomez, Sebastian; Kruijssen, J. M. Diederik; Romanowsky, Aaron J.; Carlsten, Scott; Shen, Zili; Li, Jiaxuan; Abraham, Roberto; Brodie, Jean; Conroy, Charlie; Gannon, Jonah S.; Greco, Johnny (2022)
    It has been shown that ultra-diffuse galaxies (UDGs) have higher specific frequencies of globular clusters, on average, than other dwarf galaxies with similar luminosities. The UDG NGC 5846-UDG1 is among the most extreme ...
  • Spatially Resolved Stellar Spectroscopy of the Ultra-diffuse Galaxy Dragonfly 44. III. Evidence for an Unexpected Star Formation History under Conventional Galaxy Evolution Processes 
    Villaume, Alexa; Romanowsky, Aaron J.; Brodie, Jean; van Dokkum, Pieter; Conroy, Charlie; Forbes, Duncan A.; Danieli, Shany; Martin, Christopher; Matuszewski, Matt (2022)
    We use the Keck Cosmic Web Imager integral field unit spectrograph to (1) measure the global stellar population parameters for the ultra-diffuse galaxy (UDG) Dragonfly 44 (DF44) to much higher precision than previously ...
  • A supermassive black hole in an ultra-compact dwarf galaxy 
    Seth, Anil C.; van den Bosch, Remco; Mieske, Steffen; Baumgardt, Holger; Brok, Mark Den; Strader, Jay; Neumayer, Nadine; Chilingarian, Igor; Hilker, Michael; McDermid, Richard; Spitler, Lee; Brodie, Jean; Frank, Matthias J.; Walsh, Jonelle L. (2014)
    Ultra-compact dwarf galaxies are among the densest stellar systems in the Universe. These systems have masses of up to 2 × 10<SUP>8</SUP> solar masses, but half-light radii of just 3-50 parsecs. Dynamical mass estimates ...

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