Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Zivick, Paul"'
Autor:
Muñoz, César, Monachesi, Antonela, Nidever, David L., Majewski, Steven R., Cheng, Xinlun, Olsen, Knut, Choi, Yumi, Zivick, Paul, Geisler, Douglas, Almeida, Andres, Muñoz, Ricardo R., Nitschelm, Christian, Roman-Lopes, Alexandre, Lane, Richard R., Fernández-Trincado, José G.
Publikováno v:
A&A 680, A79 (2023)
We present the first detailed chemical analysis from APOGEE-2S observations of stars in six regions of recently discovered substructures in the outskirts of the Magellanic Clouds extending to 20 degrees from the LMC center. We also present, for the f
Externí odkaz:
http://arxiv.org/abs/2305.19460
Autor:
Warfield, Jack T., Kallivayalil, Nitya, Zivick, Paul, Fritz, Tobias, Richstein, Hannah, Sohn, Sangmo Tony, del Pino, Andrés, Savino, Alessandro, Weisz, Daniel R.
We present the method behind HubPUG, a software tool built for recovering systemic proper motions (PMs) of Hubble Space Telescope (HST) fields with two epochs of observations by utilizing stars observed by Gaia as a foreground frame of reference. HST
Externí odkaz:
http://arxiv.org/abs/2209.02751
Autor:
Richstein, Hannah, Patel, Ekta, Kallivayalil, Nitya, Simon, Joshua D., Zivick, Paul, Tollerud, Erik, Fritz, Tobias, Warfield, Jack T., Besla, Gurtina, van der Marel, Roeland P., Wetzel, Andrew, Choi, Yumi, Deason, Alis, Geha, Marla, Guhathakurta, Puragra, Jeon, Myoungwon, Kirby, Evan N., Libralato, Mattia, Sacchi, Elena, Sohn, Sangmo Tony
Publikováno v:
The Astrophysical Journal, Volume 933, Issue 2, id.217, July 2022
We present deep Hubble Space Telescope (HST) photometry of the ultra-faint dwarf (UFD) galaxies Pegasus III (Peg III) and Pisces II (Psc II), two of the most distant satellites in the halo of the Milky Way (MW). We measure the structure of both galax
Externí odkaz:
http://arxiv.org/abs/2204.01917
Autor:
Choi, Yumi, Olsen, Knut A. G., Besla, Gurtina, van der Marel, Roeland P., Zivick, Paul, Kallivayalil, Nitya, Nidever, David L.
We present analysis of the proper-motion (PM) field of the red clump stars in the Large Magellanic Cloud (LMC) disk using the Gaia Early Data Release 3 catalog. Using a kinematic model based on old stars with 3D velocity measurements, we construct th
Externí odkaz:
http://arxiv.org/abs/2201.04648
We use Gaia EDR3 data to identify stars associated with six classical dwarf spheroidals (Draco, Ursa Minor, Sextans, Sculptor, Fornax, Carina) at their outermost radii, beyond their nominal King stellar limiting radius. For all of the dSphs examined,
Externí odkaz:
http://arxiv.org/abs/2111.08737
Publikováno v:
Volume 511, Issue 3, pp.4251-4264 April 2022
We combine proper motion data from $Gaia$ EDR3 and HST with line-of-sight velocity data to study the stellar kinematics of the Omega Centauri globular cluster. Using a steady-state, axisymmetric dynamical model, we measure the distribution of both th
Externí odkaz:
http://arxiv.org/abs/2109.10998
Autor:
Sacchi, Elena, Richstein, Hannah, Kallivayalil, Nitya, van der Marel, Roeland, Libralato, Mattia, Zivick, Paul, Besla, Gurtina, Brown, Thomas M., Choi, Yumi, Deason, Alis, Fritz, Tobias, Geha, Marla, Guhathakurta, Puragra, Jeon, Myoungwon, Kirby, Evan, Majewski, Steven R., Patel, Ekta, Simon, Joshua D., Sohn, Sangmo Tony, Tollerud, Erik, Wetzel, Andrew
We present the color-magnitude diagrams and star formation histories (SFHs) of seven ultra-faint dwarf galaxies: Horologium 1, Hydra 2, Phoenix 2, Reticulum 2, Sagittarius 2, Triangulum 2, and Tucana 2, derived from high-precision Hubble Space Telesc
Externí odkaz:
http://arxiv.org/abs/2108.04271
We present a new kinematic model for the Small Magellanic Cloud (SMC), using data from the \gaia\ Data Release 2 catalog. We identify a sample of astrometrically well-behaved red giant (RG) stars belonging to the SMC and cross-match with publicly ava
Externí odkaz:
http://arxiv.org/abs/2011.02525
Autor:
Martinez-Delgado, David, Vivas, A. Katherina, Grebel, Eva K., Gallart, Carme, Pieres, Adriano, Bell, Cameron P. M., Zivick, Paul, Lemasle, Bertrand, Johnson, L. Clifton, Carballo-Bello, Julio A., Noel, Noelia E. D., Cioni, Maria-Rosa L., Choi, Yumi, Besla, Gurtina, Schmidt, Judy, Zaritsky, Dennis, Gruendl, Robert A., Seibert, Mark, Nidever, David, Monteagudo, Laura, Monelli, Mateo, Hubl, Bernhard, van der Marel, Roeland, Ballesteros, Fernando J., Stringfellow, Guy, Walker, Alistair, Blum, Robert, Bell, Eric F., Conn, Blair C., Olsen, Knut, Martin, Nicolas, Chu, You-Hua, Inno, Laura, Boer, Thomas J. L., Kallivayalil, Nitya, De Leo, Michele, Beletsky, Yuri, Munoz, Ricardo R.
Publikováno v:
A&A 631, A98 (2019)
Understanding the evolutionary history of the Magellanic Clouds requires an in-depth exploration and characterization of the stellar content in their outer regions, which ultimately are key to tracing the epochs and nature of past interactions. We pr
Externí odkaz:
http://arxiv.org/abs/1907.02264
Autor:
Zivick, Paul, Kallivayalil, Nitya, Besla, Gurtina, Sohn, Sangmo Tony, van der Marel, Roeland P., del Pino, Andrés, Linden, Sean T., Fritz, Tobias K., Anderson, J.
We present the first detailed kinematic analysis of the proper motions (PMs) of stars in the Magellanic Bridge, from both the \textit{Gaia} Data Release 2 catalog and from \textit{Hubble Space Telescope} Advanced Camera for Surveys data. For the \tex
Externí odkaz:
http://arxiv.org/abs/1811.09318