Zobrazeno 1 - 10
of 124
pro vyhledávání: '"Gurtina Besla"'
Autor:
Paul Bennet, Ekta Patel, Sangmo Tony Sohn, Andrés del Pino Molina, Roeland P. van der Marel, Mattia Libralato, Laura L. Watkins, Antonio Aparicio, Gurtina Besla, Carme Gallart, Mark A. Fardal, Matteo Monelli, Elena Sacchi, Erik Tollerud, Daniel R. Weisz
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 98 (2024)
We have determined the proper motions (PMs) of 12 dwarf galaxies in the Local Group (LG), ranging from the outer Milky Way (MW) halo to the edge of the LG. We used the Hubble Space Telescope (HST) as the first and Gaia as the second epoch using the G
Externí odkaz:
https://doaj.org/article/94aa8ef67f184997ae2d546936fb9d49
Autor:
Eduardo Vitral, Roeland P. van der Marel, Sangmo Tony Sohn, Mattia Libralato, Andrés del Pino, Laura L. Watkins, Andrea Bellini, Matthew G. Walker, Gurtina Besla, Marcel S. Pawlowski, Gary A. Mamon
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 1, p 1 (2024)
We analyze four epochs of Hubble Space Telescope imaging over 18 yr for the Draco dwarf spheroidal galaxy. We measure precise proper motions for hundreds of stars and combine these with existing line-of-sight (LOS) velocities. This provides the first
Externí odkaz:
https://doaj.org/article/fe5d77fa7d9e4de69d5910b6bdc28634
Autor:
Hannah Richstein, Nitya Kallivayalil, Joshua D. Simon, Christopher T. Garling, Andrew Wetzel, Jack T. Warfield, Roeland P. van der Marel, Myoungwon Jeon, Jonah C. Rose, Paul Torrey, Anna Claire Engelhardt, Gurtina Besla, Yumi Choi, Marla Geha, Puragra Guhathakurta, Evan N. Kirby, Ekta Patel, Elena Sacchi, Sangmo Tony Sohn
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 1, p 72 (2024)
We present deep Hubble Space Telescope photometry of 10 targets from Treasury Program GO-14734, including six confirmed ultrafaint dwarf (UFD) galaxies, three UFD candidates, and one likely globular cluster. Six of these targets are satellites of, or
Externí odkaz:
https://doaj.org/article/f6c2bd724303463c9650bc0d6ac794d2
Autor:
Michael G. Jones, David J. Sand, Ananthan Karunakaran, Kristine Spekkens, Kyle A. Oman, Paul Bennet, Gurtina Besla, Denija Crnojević, Jean-Charles Cuillandre, Catherine E. Fielder, Stephen Gwyn, Burçin Mutlu-Pakdil
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 1, p 93 (2024)
We have imaged the entirety of eight (plus one partial) Milky Way (MW)–like satellite systems, a total of 42 (45) satellites, from the Satellites Around Galactic Analogs II catalog in both H α and H i with the Canada–France–Hawaii Telescope an
Externí odkaz:
https://doaj.org/article/6e287f3ab03b4238809a2fd74f7a6551
Autor:
Katie Chamberlain, Gurtina Besla, Ekta Patel, Vicente Rodriguez-Gomez, Paul Torrey, Garreth Martin, Kelsey Johnson, Nitya Kallivayalil, David Patton, Sarah Pearson, George Privon, Sabrina Stierwalt
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 2, p 162 (2024)
Low-mass galaxy pair fractions are understudied, and it is unclear whether low-mass pair fractions evolve in the same way as more massive systems over cosmic time. In the era of JWST, Roman, and Rubin, selecting galaxy pairs in a self-consistent way
Externí odkaz:
https://doaj.org/article/fbb7b4c006704cb7bdba11d80e9e585d
Autor:
David J. Setton, Gurtina Besla, Ekta Patel, Cameron Hummels, Yong Zheng, Evan Schneider, Munier Salem
Publikováno v:
The Astrophysical Journal Letters, Vol 959, Iss 1, p L11 (2023)
The interaction between the supersonic motion of the Large Magellanic Cloud (LMC) and the circumgalactic medium (CGM) is expected to result in a bow shock that leads the LMC’s gaseous disk. In this letter, we use hydrodynamic simulations of the LMC
Externí odkaz:
https://doaj.org/article/36fde9d5e6394def81223586c329878f
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:
Ekta Patel, Nitya Kallivayalil, Nicolas Garavito-Camargo, Gurtina Besla, Daniel R. Weisz, Roeland P. van der Marel, Michael Boylan-Kolchin, Marcel S. Pawlowski, Facundo A. Gómez
Publikováno v:
The Astrophysical Journal, Vol 954, Iss 2, p 221 (2023)
Externí odkaz:
https://doaj.org/article/8a74caef433f4f6ca606385ba4b327b8
Autor:
Hayden R. Foote, Gurtina Besla, Philip Mocz, Nicolás Garavito-Camargo, Lachlan Lancaster, Martin Sparre, Emily C. Cunningham, Mark Vogelsberger, Facundo A. Gómez, Chervin F. P. Laporte
Publikováno v:
The Astrophysical Journal, Vol 954, Iss 2, p 163 (2023)
The Large Magellanic Cloud (LMC) will induce a dynamical friction (DF) wake on infall to the Milky Way (MW). The MW’s stellar halo will respond to the gravity of the LMC and the dark matter (DM) wake, forming a stellar counterpart to the DM wake. T
Externí odkaz:
https://doaj.org/article/e3ee841cfd6c40dd99c6a944a5bc376d
Autor:
Katie Chamberlain, Adrian M. Price-Whelan, Gurtina Besla, Emily C. Cunningham, Nicolás Garavito-Camargo, Jorge Peñarrubia, Michael S. Petersen
Publikováno v:
The Astrophysical Journal, Vol 942, Iss 1, p 18 (2022)
The total mass of the Local Group (LG) is a fundamental quantity that enables interpreting the orbits of its constituent galaxies and placing the LG in a cosmological context. One of the few methods that allows inferring the total mass directly is th
Externí odkaz:
https://doaj.org/article/cc3a6443ba3042c5acc75e97d8982cd6