Results 151 to 160 of about 370,839 (289)

Extinction Distributions in Nearby Star-resolved Galaxies. I. M31

The Astronomical Journal
An extinction distribution of the Andromeda galaxy (M31) is constructed with member stars as tracers by fitting multiband photometric data from UKIRT/WFCAM, Panoramic Survey Telescope and Rapid Response System 1, and Gaia DR3.
Yuxi Wang, Jian Gao, Yi Ren, Bingqiu Chen   +3 more
doaj   +1 more source

The photometric properties of a vast stellar substructure in the outskirts of M33

, 2010
We have surveyed $\sim40$sq.degrees surrounding M33 with CFHT MegaCam in the g and i filters, as part of the Pan-Andromeda Archaeological Survey. Our observations are deep enough to resolve the top 4mags of the red giant branch population in this galaxy.
Aaron Dotter, Alan W. McConnachie, Annette M. N. Ferguson, Barker, Bohlin, Bonanos, Chandar, Ciardullo, Clem, Corbelli, Da Costa, Dotter, Dotter, Ferguson, Ferguson, Geraint F. Lewis, Huxor, Ibata, Irwin, Irwin, John Dubinski, Lawrence M. Widrow, Magrini, Martin, Martin, McConnachie, McConnachie, Michael J. Irwin, Purcell, Putman, Rocha-Pinto, Rodrigo Ibata, Sarajedini, Schlegel, Stonkutė, Tiede, U, Zucker, Zucker   +38 more
core   +1 more source

The M31–M33 Interaction: Impact on M31’s Center-of-mass Motion and Satellite Orbits

The Astrophysical Journal
Inspired by recent studies of the interaction between the Milky Way and the Large Magellanic Cloud and its implications for the Milky Way’s global dynamical history, we investigate how the massive satellite galaxy M33 influences the position and velocity
Ekta Patel, Nicolás Garavito-Camargo, Ivanna Escala   +2 more
doaj   +1 more source

Far-ultraviolet to Far-infrared Spectral Energy Distribution Modeling of the Star Formation History across M31

The Astronomical Journal
Our neighboring galaxy M31 has been recently surveyed at the far- and near-ultraviolet (FUV and NUV) with the UVIT telescope on AstroSat, which provides unprecedented sensitivity to young stellar populations.
Denis A. Leahy, Jakob Hansen, Andrew M. Hopkins   +2 more
doaj   +1 more source

Can the New Neutrino Telescopes Reveal the Gravitational Properties of Antimatter?

Advances in Astronomy, 2011
We argue that the hypothesis of the gravitational repulsion between matter and antimatter can be tested at the Ice Cube, a neutrino telescope, recently constructed at the South Pole.
Dragan Slavkov Hajdukovic
doaj   +1 more source

Stellar Metallicities and Gradients in the Faint M31 Satellites Andromeda XVI and Andromeda XXVIII

The Astrophysical Journal
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.
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   +13 more
doaj   +1 more source

Perspectives. [PDF]

AJNR Am J Neuroradiol, 2023
Ross JS.
europepmc   +1 more source

On the Adromeda to Milky Way mass-ratio

, 2009
We have explored the hypothesis that the total mass-ratio of the two main galaxies of the Local Group: Andromeda Galaxy(M31) and the Milky Way (MW) can be constrained measuring the tidal force induced by the surrounding mass distribution, M31 included ...
Baiesi Pillastrini, Battaglia, Bellazzini, Belokurov, Belokurov, Belokurov, Besla, Cen, Dehnen, Diemand, Evans, Evans, Evans, Giovanni C. Baiesi Pillastrini, Gottesman, Grcevich, Irwin, Kalberla, Karachentsev, Karachentsev, Klypin, Koposov, Li, Lin, Loeb, Madau, Majewski, Martin, Muñoz, Pasetto, Peebles, Peebles, Penarrubia, Ramella, Sakamoto, Seigar, Shattow, Simon, Smith, Sohn, Tollerud, Walker, Walsh, Wilkinson, Willman, Willman, Xue, Young, Young, Zaristky, Zucker, Zucker, Zucker, Zucker   +53 more
core   +1 more source

The Hubble Space Telescope Survey of M31 Satellite Galaxies. IV. Survey Overview and Lifetime Star Formation Histories

The Astrophysical Journal
From >1000 orbits of HST imaging, we present deep homogeneous resolved star color–magnitude diagrams that reach the oldest main-sequence turnoff and uniformly measured star formation histories (SFHs) of 36 dwarf galaxies (−6 ≥ M _V ≥ −17) associated with
Alessandro Savino, Daniel R. Weisz, Andrew E. Dolphin, Meredith J. Durbin, Nitya Kallivayalil, Andrew Wetzel, Jay Anderson, Gurtina Besla, Michael Boylan-Kolchin, Thomas M. Brown, 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 N. Kirby, Geraint F. Lewis, Dougal Mackey, Steven R. Majewski, Nicolas Martin, Alan McConnachie, Ekta Patel, R. Michael Rich, Evan D. Skillman, Joshua D. Simon, Sangmo Tony Sohn, Erik J. Tollerud, Roeland P. van der Marel   +37 more
doaj   +1 more source

Prospects for Detecting Gaps in Globular Cluster Stellar Streams in External Galaxies with the Nancy Grace Roman Space Telescope

The Astrophysical Journal
Stellar streams form through the tidal disruption of satellite galaxies or globular clusters orbiting a host galaxy. Globular cluster streams are exciting since they are thin (dynamically cold) and therefore sensitive to perturbations from low-mass ...
Christian Aganze, Sarah Pearson, Tjitske Starkenburg, Gabriella Contardo, Kathryn V. Johnston, Kiyan Tavangar, Adrian M. Price-Whelan, Adam J. Burgasser   +7 more
doaj   +1 more source