Zobrazeno 51 - 60
of 277
pro vyhledávání: '"Besla, Gurtina"'
Autor:
Pearson, Sarah, Privon, George C., Besla, Gurtina, Putman, Mary E., Martínez-Delgado, David, Johnston, Kathryn V., Gabany, R. Jay, Patton, David R., Kallivayalil, Nitya
Publikováno v:
MNRAS, 480, 3, 2018, p: 3069
Discoveries of low mass galaxy pairs and groups are increasing. Studies indicate that dwarf galaxy pairs are gas rich in the field and exhibit elevated star formation rates, suggestive of interactions. Lacking are dynamical models of observed dwarf g
Externí odkaz:
http://arxiv.org/abs/1807.03791
First Gaia Dynamics of the Andromeda System: DR2 Proper Motions, Orbits, and Rotation of M31 and M33
Autor:
van der Marel, Roeland P., Fardal, Mark A., Sohn, Sangmo Tony, Patel, Ekta, Besla, Gurtina, del Pino-Molina, Andrés, Sahlmann, Johannes, Watkins, Laura L.
The 3D velocities of M31 and M33 are important for understanding the evolution and cosmological context of the Local Group. Their most massive stars are detected by Gaia, and we use Data Release 2 (DR2) to determine the galaxy proper motions (PMs). W
Externí odkaz:
http://arxiv.org/abs/1805.04079
Autor:
Nidever, David L., Olsen, Knut, Choi, Yumi, de Boer, Thomas J. L., Blum, Robert D., Bell, Eric F., Zaritsky, Dennis, Martin, Nicolas F., Saha, Abhijit, Conn, Blair C., Besla, Gurtina, van der Marel, Roeland P., Noel, Noelia E. D., Monachesi, Antonela, Stringfellow, Guy S., Massana, Pol, Cioni, Maria-Rosa L., Gallart, Carme, Monelli, Matteo, Martinez-Delgado, David, Munoz, Ricardo R., Majewski, Steven R., Vivas, A. Katherina, Walker, Alistair R., Kaleida, Catherine, Chu, You-Hua
We present the detection of very extended stellar populations around the Large Magellanic Cloud (LMC) out to R~21 degrees, or ~18.5 kpc at the LMC distance of 50 kpc, as detected in the Survey of the MAgellanic Stellar History (SMASH) performed with
Externí odkaz:
http://arxiv.org/abs/1805.02671
Autor:
Kallivayalil, Nitya, Sales, Laura, Zivick, Paul, Fritz, Tobias K., Del Pino, Andrés, Sohn, Sangmo Tony, Besla, Gurtina, van der Marel, Roeland P., Navarro, Julio F., Sacchi, Elena
Publikováno v:
The Astrophysical Journal, Volume 867, Issue 1, article id. 19, 10 pp. (2018)
According to LCDM theory, hierarchical evolution occurs on all mass scales, implying that satellites of the Milky Way should also have companions. The recent discovery of ultra-faint dwarf galaxy candidates in close proximity to the Magellanic Clouds
Externí odkaz:
http://arxiv.org/abs/1805.01448
Autor:
Choi, Yumi, Nidever, David L., Olsen, Knut, Besla, Gurtina, Blum, Robert D., Zaritsky, Dennis, Cioni, Maria-Rosa L., van der Marel, Roeland P., Bell, Eric F., Johnson, L. Clifton, Vivas, A. Katherina, Walker, Alistair R., de Boer, Thomas J. L., Noel, Noelia E. D., Monachesi, Antonela, Gallart, Carme, Monelli, Matteo, Stringfellow, Guy S., Massana, Pol, Martinez-Delgado, David, Munoz, Ricardo
Publikováno v:
2018 ApJ, 869, 125
We explore the stellar structure of the Large Magellanic Cloud (LMC) disk using data from the Survey of the MAgellanic Stellar History (SMASH) and the Dark Energy Survey. We detect a ring-like stellar overdensity in the red clump star count map at a
Externí odkaz:
http://arxiv.org/abs/1805.00481
Autor:
Choi, Yumi, Nidever, David L., Olsen, Knut, Blum, Robert D., Besla, Gurtina, Zaritsky, Dennis, van der Marel, Roeland P., Bell, Eric F., Gallart, Carme, Cioni, Maria-Rosa L., Johnson, L. Clifton, Vivas, A. Katherina, Saha, Abhijit, de Boer, Thomas J. L., Noel, Noelia E. D., Monachesi, Antonela, Massana, Pol, Conn, Blair C., Martinez-Delgado, David, Munoz, Ricardo R., Stringfellow, Guy
Publikováno v:
2018 ApJ, 866, 90
We present a study of the three-dimensional (3D) structure of the Large Magellanic Cloud (LMC) using ~2.2 million red clump (RC) stars selected from the Survey of the MAgellanic Stellar History. To correct for line-of-sight dust extinction, the intri
Externí odkaz:
http://arxiv.org/abs/1804.07765
Autor:
Zivick, Paul, Kallivayalil, Nitya, van der Marel, Roeland P., Besla, Gurtina, Linden, Sean T., Kozłowski, Szymon, Fritz, Tobias K., Kochanek, C. S., Anderson, J., Sohn, Sangmo Tony, Geha, Marla C., Alcock, Charles R.
Publikováno v:
The Astrophysical Journal, Volume 864, Issue 1, article id. 55, 13 pp. (2018)
We present a new measurement of the systemic proper motion of the Small Magellanic Cloud (SMC), based on an expanded set of 30 fields containing background quasars and spanning a $\sim$3 year baseline, using the \textit{Hubble Space Telescope} (\text
Externí odkaz:
http://arxiv.org/abs/1804.04110
Autor:
Sohn, Sangmo Tony, Watkins, Laura L., Fardal, Mark A., van der Marel, Roeland P., Deason, Alis J., Besla, Gurtina, Bellini, Andrea
We present Hubble Space Telescope (HST) absolute proper motion (PM) measurements for 20 globular clusters (GCs) in the Milky Way (MW) halo at Galactocentric distances $R_{\rm GC} \approx 10-100$ kpc, with median per-coordinate PM uncertainty 0.06 mas
Externí odkaz:
http://arxiv.org/abs/1804.01994
High precision proper motion (PM) measurements are available for approximately 20% of all known dwarf satellite galaxies of the Milky Way (MW). Here we extend the Bayesian framework of Patel et al. (2017b) to include all MW satellites with measured 6
Externí odkaz:
http://arxiv.org/abs/1803.01878
Autor:
Hendel, David, Scowcroft, Victoria, Johnston, Kathryn V., Fardal, Mark A., van der Marel, Roeland P., Sohn, Sangmo Tony, Price-Whelan, Adrian M., Beaton, Rachael L., Besla, Gurtina, Bono, Giuseppe, Cioni, Maria-Rosa L., Clementini, Gisella, Cohen, Judith G., Fabrizio, Michele, Freedman, Wendy L., Garofalo, Alessia, Grillmair, Carl J., Kallivayalil, Nitya, Kollmeier, Juna A., Law, David R., Madore, Barry F., Majewski, Steven R., Marengo, Massimo, Monson, Andrew J., Neeley, Jillian R., Nidever, David L., Pietrzyński, Grzegorz, Seibert, Mark, Sesar, Branimir, Smith, Horace A., Soszyński, Igor, Thompson, Ian B., Udalski, Andrezej
Stellar tidal streams provide an opportunity to study the motion and structure of the disrupting galaxy as well as the gravitational potential of its host. Streams around the Milky Way are especially promising as phase space positions of individual s
Externí odkaz:
http://arxiv.org/abs/1711.04663