Zobrazeno 1 - 10
of 70
pro vyhledávání: '"Michelle L M, Collins"'
Autor:
Sal Wanying Fu, Daniel R. Weisz, Else Starkenburg, Nicolas Martin, Michelle L. M. Collins, Alessandro Savino, Michael Boylan-Kolchin, Patrick Côté, Andrew E. Dolphin, Nicolas Longeard, Mario L. Mateo, Francisco J. Mercado, Nathan R. Sandford, Evan D. Skillman
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 2 (2024)
We present ∼300 stellar metallicity measurements in two faint M31 dwarf galaxies, Andromeda XVI ( M _V = −7.5) and Andromeda XXVIII ( M _V = –8.8), derived using metallicity-sensitive calcium H and K narrowband Hubble Space Telescope imaging. T
Externí odkaz:
https://doaj.org/article/f94c675453d84e2e8dacaf2092a9e26d
Autor:
L. R. Cullinane, Karoline M. Gilbert, Ivanna Escala, J. Leigh Wojno, Evan N. Kirby, Kateryna A. Kvasova, Erik Tollerud, Michelle L. M. Collins, R. Michael Rich
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 2, p 133 (2024)
With a luminosity similar to that of Milky Way dwarf spheroidal systems like Sextans, but a spatial extent similar to that of ultra-diffuse galaxies, Andromeda (And) XIX is an unusual satellite of M31. To investigate the origin of this galaxy, we mea
Externí odkaz:
https://doaj.org/article/84ca5411acc642eda254f5e41c81cb66
Autor:
Alessandro Savino, Daniel R. Weisz, Evan D. Skillman, Andrew Dolphin, Andrew A. Cole, Nitya Kallivayalil, Andrew Wetzel, Jay Anderson, Gurtina Besla, Michael Boylan-Kolchin, Thomas M. Brown, James S. Bullock, Michelle L. M. Collins, M. C. Cooper, Alis J. Deason, Aaron L. Dotter, Mark Fardal, Annette M. N. Ferguson, Tobias K. Fritz, Marla C. Geha, Karoline M. Gilbert, Puragra Guhathakurta, Rodrigo Ibata, Michael J. Irwin, Myoungwon Jeon, Evan N. Kirby, Geraint F. Lewis, Dougal Mackey, Steven R. Majewski, Nicolas Martin, Alan McConnachie, Ekta Patel, R. Michael Rich, Joshua D. Simon, Sangmo Tony Sohn, Erik J. Tollerud, Roeland P. van der Marel
Publikováno v:
The Astrophysical Journal, Vol 956, Iss 2, p 86 (2023)
We present the lifetime star formation histories (SFHs) for six ultrafaint dwarf (UFD; M _V > − 7.0, $4.9\lt {\mathrm{log}}_{10}({M}_{* }(z=0)/{M}_{\odot })\lt 5.5$ ) satellite galaxies of M31 based on deep color–magnitude diagrams constructed fr
Externí odkaz:
https://doaj.org/article/efdc31fc14f44af8aab3dadcb900d2b4
Autor:
Michelle L M Collins, Emily J E Charles, David Martínez-Delgado, Matteo Monelli, Noushin Karim, Giuseppe Donatiello, Erik J Tollerud, Walter Boschin
Publikováno v:
Monthly Notices of the Royal Astronomical Society: Letters. 515:L72-L77
We report the discovery of an ultrafaint dwarf in the constellation of Pegasus. Pegasus V (Peg V)/Andromeda XXXIV was initially identified in the public imaging data release of the DESI Legacy Imaging Surveys and confirmed with deep imaging from Gemi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::26359e0c576130fe02690fcc6a75fcb1
https://doi.org/10.1093/mnrasl/slac063
https://doi.org/10.1093/mnrasl/slac063
Autor:
Michelle L M Collins, Benjamin F Williams, Erik J Tollerud, Eduardo Balbinot, Karoline M Gilbert, Andrew Dolphin
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 517(3), 4382-4388. Oxford University Press
We present deep imaging of the ultra-diffuse Andromeda XIX dwarf galaxy from the Advance Camera for Surveys on the Hubble Space Telescope which resolves its stellar populations to below the oldest main sequence turn-off. We derive a full star formati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99df056a2cd709dea5495cb7fd7425ad
http://arxiv.org/abs/2209.12912
http://arxiv.org/abs/2209.12912
Autor:
Rodrigo A. Ibata, Nicolas F. Martin, R. Michael Rich, Janet Preston, M. A. Fardal, Michelle L. M. Collins
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2021, 504 (2), pp.3098-3110. ⟨10.1093/mnras/stab957⟩
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2021, 504 (2), pp.3098-3110. ⟨10.1093/mnras/stab957⟩
We present the first comprehensive spectroscopic study of the Andromeda galaxy’s Eastern Extent. This ∼4° long filamentary structure, located 70–90 kpc from the centre of M31, lies perpendicular to Andromeda’s minor axis and the Giant Stella
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::93471207f82812fa71ee0bc123da7350
https://doi.org/10.1093/mnras/stab957
https://doi.org/10.1093/mnras/stab957
Autor:
Jay Strader, Alexandra L. Gregory, Lewis Hill, Denis Erkal, David J. Sand, Michelle L. M. Collins, Erik Tollerud, Maxime Delorme, Beth Willman
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 496:1092-1104
We present new chemo--kinematics of the Hercules dwarf galaxy based on Keck II-- DEIMOS spectroscopy. Our 21 confirmed members have a systemic velocity of $v_{\mathrm{Herc}}=46.4\pm1.3$ kms$^{-1}$ and a velocity dispersion $\sigma_{v,\mathrm{Herc}}=4
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1b3940921b6eaa2ed234ab30e77cc488
https://doi.org/10.1093/mnras/staa1553
https://doi.org/10.1093/mnras/staa1553
Autor:
Emily J E Charles, Michelle L M Collins, R Michael Rich, Justin I Read, Stacy Y Kim, Rodrigo A Ibata, Nicolas F Martin, Scott C Chapman, Eduardo Balbinot, Daniel R Weisz
Andromeda (And) XXV has previously been reported as a dwarf spheroidal galaxy (dSph) with little-to-no dark matter. However, the uncertainties on this result were significant. In this study, we double the number of member stars and re-derive the kine
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::001e492b4807d37d10c6ec1957e9c683
https://hal.science/hal-03815558
https://hal.science/hal-03815558
Autor:
Alessandro Savino, Daniel R. Weisz, Evan D. Skillman, Andrew Dolphin, Nitya Kallivayalil, Andrew Wetzel, Jay Anderson, Gurtina Besla, Michael Boylan-Kolchin, James S. Bullock, Andrew A. Cole, Michelle L. M. Collins, M. C. Cooper, Alis J. Deason, Aaron L. Dotter, Mark Fardal, Annette M. N. Ferguson, Tobias K. Fritz, Marla C. Geha, Karoline M. Gilbert, Puragra Guhathakurta, Rodrigo Ibata, Michael J. Irwin, Myoungwon Jeon, Evan Kirby, Geraint F. Lewis, Dougal Mackey, Steven R. Majewski, Nicolas Martin, Alan McConnachie, Ekta Patel, R. Michael Rich, Joshua D. Simon, Sangmo Tony Sohn, Erik J. Tollerud, Roeland P. van der Marel
We measure homogeneous distances to M31 and 38 associated stellar systems ($-$16.8$\le M_V \le$ $-$6.0), using time-series observations of RR Lyrae stars taken as part of the Hubble Space Telescope Treasury Survey of M31 Satellites. From $>700$ orbit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce7226c2c6c9bbe17b9c3b27ef5a11dd
https://www.repository.cam.ac.uk/handle/1810/342208
https://www.repository.cam.ac.uk/handle/1810/342208
Autor:
Michael Fusco, James S. Bullock, R. Michael Rich, Julia Kennefick, David A. Thilker, Lydia M. Elias, Aleksandr V. Mosenkov, M. L. Saade, Dave G. Milewski, Michelle L. M. Collins, John Kormendy, Noah Brosch, Laura V. Sales, Andreas Burkert, David Reitzel, Laura de Groot, Andreas Koch, Henry Lee-Saunders, Michael C. Cooper
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 490:1539-1569
We use a dedicated 0.7-m telescope to image the halos of 119 galaxies in the Local Volume to $\mu_r \sim 28-30$ mag/arcsec$^2$. The sample is primarily from the 2MASS Large Galaxy Atlas and extended to include nearby dwarf galaxies and more distant g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::57d9b706a827302b64e5c2ad5961d102
https://doi.org/10.1093/mnras/stz2106
https://doi.org/10.1093/mnras/stz2106