Zobrazeno 31 - 40
of 198
pro vyhledávání: '"Collins, Michelle L"'
Autor:
Contenta, Filippo, Balbinot, Eduardo, Petts, James A., Read, Justin I., Gieles, Mark, Collins, Michelle L. M., Peñarrubia, Jorge, Delorme, Maxime, Gualandris, Alessia
Publikováno v:
MNRAS 476 (2018) 3124-3136
We present a new technique to probe the central dark matter (DM) density profile of galaxies that harnesses both the survival and observed properties of star clusters. As a first application, we apply our method to the `ultra-faint' dwarf Eridanus II
Externí odkaz:
http://arxiv.org/abs/1705.01820
Autor:
Martin, Nicolas F., Weisz, Daniel R., Albers, Saundra M., Bernard, Edouard, Collins, Michelle L. M., Dolphin, Andrew E., Ferguson, Annette M. N., Ibata, Rodrigo A., Laevens, Benjamin, Lewis, Geraint F., Mackey, A. Dougal, McConnachie, Alan, Rich, R. Michael, Skillman, Evan D.
We present homogeneous, sub-horizontal branch photometry of twenty dwarf spheroidal satellite galaxies of M31 observed with the Hubble Space Telescope. Combining our new data for sixteen systems with archival data in the same filters for another four
Externí odkaz:
http://arxiv.org/abs/1704.01586
In the last decade, several ultra faint objects (UFOs, $M_V\gtrsim-3.5$) have been discovered in the outer halo of the Milky Way. For some of these objects it is not clear whether they are star clusters or (ultra-faint) dwarf galaxies. In this work w
Externí odkaz:
http://arxiv.org/abs/1611.06397
Autor:
Koch, Andreas, Black, Christine S., Rich, R. Michael, Longstaff, Francis A., Collins, Michelle L. M., Janz, Joachim
We present new wide-field images of the low-surface brightness Virgo Cluster dwarf galaxy VCC 1661. The extant literature lists a broad range of radii for this object, covering a factor of more than four, depending on the filters used and the details
Externí odkaz:
http://arxiv.org/abs/1610.07831
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Autor:
Collins, Michelle L. M., Tollerud, Erik J., Sand, David J., Bonaca, Ana, Willman, Beth, Strader, Jay
We present a chemodynamical analysis of the Leo~V dwarf galaxy, based on Keck II DEIMOS spectra of 8 member stars. We find a systemic velocity for the system of $\langle v_r\rangle = 170.9^{+ 2.1}_{-1.9}$kms$^{-1}$, and barely resolve a velocity disp
Externí odkaz:
http://arxiv.org/abs/1608.05710
Autor:
Küpper, Andreas H. W., Johnston, Kathryn V., Mieske, Steffen, Collins, Michelle L. M., Tollerud, Erik J.
The ultra-faint satellite galaxy Hercules has a strongly elongated and irregular morphology with detections of tidal features up to 1.3 deg (3 kpc) from its center. This suggests that Hercules may be dissolving under the Milky Way's gravitational inf
Externí odkaz:
http://arxiv.org/abs/1608.05085
Autor:
Collins, Michelle L. M., Rich, R. Michael, Ibata, Rodrigo A., Martin, Nicolas F., Preston, Janet
As part of the Z-PAndAS Keck II DEIMOS survey of resolved stars in our neighboring galaxy, Andromeda (M31), we have built up a unique data set of measured velocities and chemistries for thousands of stars in the Andromeda stellar halo, particularly p
Externí odkaz:
http://arxiv.org/abs/1605.03345
Autor:
Voggel, Karina, Hilker, Michael, Baumgardt, Holger, Collins, Michelle L. M., Grebel, Eva K., Husemann, Bernd, Richtler, Tom, Frank, Matthias J.
We present MUSE observations of the debated ultra faint stellar system Crater. We spectroscopically confirm 26 member stars of this system via radial velocity measurements. We derive the systematic instrumental velocity uncertainty of MUSE spectra to
Externí odkaz:
http://arxiv.org/abs/1604.06806
Autor:
Martin, Nicolas F., Ibata, Rodrigo A., Collins, Michelle L. M., Rich, R. Michael, Bell, Eric F., Ferguson, Annette M. N., Laevens, Benjamin P. M., Rix, Hans-Walter, Chapman, Scott C., Koch, Andreas
We present a study of the recently discovered compact stellar system Triangulum II. From observations conducted with the DEIMOS spectrograph on Keck II, we obtained spectra for 13 member stars that follow the CMD features of this very faint stellar s
Externí odkaz:
http://arxiv.org/abs/1510.04433