output
19932026
Showing 2013 · astro-ph.GAShow all

19 papers · 2 filters

astro-ph.GA2013★ 276 cited

The large-scale structure of the halo of the Andromeda Galaxy Part I: global stellar density, morphology and metallicity properties

Rodrigo A. Ibata, Geraint F. Lewis, Alan W. McConnachie +14

We present an analysis of the large-scale structure of the halo of the Andromeda galaxy, based on the Pan-Andromeda Archeological Survey (PAndAS), currently the most complete map o…

astro-ph.GA2013★ 46 cited

The circumnuclear environment of NGC613: a nuclear starburst caught in the act?

J. Falcón-Barroso, C. Ramos Almeida, T. Böker +4

We present near-infrared (- and -band) integral-field observations of the inner 700pc of the active spiral galaxy NGC613, obtained with SINFONI on the Very Large Telesc…

astro-ph.GA2013★ 25 cited

Major Substructure in the M31 Outer Halo: the South-West Cloud

N. F. Bate, A. R. Conn, B. McMonigal +11

We undertake the first detailed analysis of the stellar population and spatial properties of a diffuse substructure in the outer halo of M31. The South-West Cloud lies at a project…

astro-ph.GA2013★ 83 cited

In the thick of it: metal-poor disc stars in RAVE

G. Kordopatis, G. Gilmore, R. F. G. Wyse +17

By selecting in the RAVE-DR4 survey the stars located between 1 and 2 kpc above the Galactic plane, we question the consistency of the simplest three-component model (thin disc, th…

astro-ph.GA2013★ 93 cited

A new stellar chemo-kinematic relation reveals the merger history of the Milky Way disc

I. Minchev, C. Chiappini, M. Martig +27

The velocity dispersions of stars near the Sun are known to increase with stellar age, but age can be difficult to determine so a proxy like the abundance of alpha elements (e.g.,…

astro-ph.GA2013★ 387 cited

The RAdial Velocity Experiment (RAVE): Fourth data release

G. Kordopatis, G. Gilmore, M. Steinmetz +48

We present the stellar atmospheric parameters (effective temperature, surface gravity, overall metallicity), radial velocities, individual abundances and distances determined for 4…

astro-ph.GA2013★ 83 cited

Chemical gradients in the Milky Way from the RAVE data. I. Dwarf stars

C. Boeche, A. Siebert, T. Piffl +20

Aim: We aim at measuring the chemical gradients of the elements Mg, Al, Si, and Fe along the Galactic radius to provide new constraints on the chemical evolution models of the Gala…

astro-ph.GA2013★ 40 cited

Diffuse interstellar band at 8620 Å in RAVE: A new method for detecting the diffuse interstellar band in spectra of cool stars

J. Kos, T. Zwitter, E. K. Grebel +16

Diffuse interstellar bands are usually observed in spectra of hot stars, where interstellar lines are rarely blended with stellar ones. The need for hot stars is a strong limitatio…

astro-ph.GA2013★ 300 cited

The RAVE survey: the Galactic escape speed and the mass of the Milky Way

T. Piffl, C. Scannapieco, J. Binney +22

We construct new estimates on the Galactic escape speed at various Galactocentric radii using the latest data release of the Radial Velocity Experiment (RAVE DR4). Compared to prev…

astro-ph.GA2013★ 135 cited

Constraints on the Galactic Bar from the Hercules stream as traced with RAVE across the Galaxy

T. Antoja, A. Helmi, W. Dehnen +20

Non-axisymmetries in the Galactic potential (spiral arms and bar) induce kinematic groups such as the Hercules stream. Assuming that Hercules is caused by the effects of the Outer…

astro-ph.GA2013★ 112 cited

The PAndAS view of the Andromeda satellite system - I. A Bayesian search for dwarf galaxies using spatial and color-magnitude information

Nicolas F. Martin, Rodrigo A. Ibata, Alan W. McConnachie +5

We present a generic algorithm to search for dwarf galaxies in photometric catalogs and apply it to the Pan-Andromeda Archaeological Survey (PAndAS). The algorithm is developed in…

astro-ph.GA2013★ 33 cited

Young stellar clusters in the Rosette molecular cloud. Arguments against triggered star formation

L. Cambrésy, G. Marton, O. Feher +2

The Rosette complex is a well studied region of the galactic plane which presents the apparent characteristics of a triggered star forming region. This is however still debated as…

astro-ph.GA2013★ 1 cited

Local Group timing in Milgromian dynamics. A past Milky Way-Andromeda encounter at z>0.8

HongSheng Zhao, Benoit Famaey, Fabian Lüghausen +1

The Local Group timing has been one of the first historical probes of the missing mass problem. Whilst modern cosmological probes indicate that pure baryonic dynamics is not suffic…

astro-ph.GA2013★ 20 cited

A peculiar faint satellite in the remote outer halo of M31

Dougal Mackey, Avon Huxor, Nicolas Martin +9

We present Hubble Space Telescope imaging of a newly-discovered faint stellar system, PAndAS-48, in the outskirts of the M31 halo. Our photometry reveals this object to be comprise…

astro-ph.GA2013★ 46 cited

Polar ring galaxies as tests of gravity

F. Lüghausen, B. Famaey, P. Kroupa +5

Polar ring galaxies are ideal objects with which to study the three-dimensional shapes of galactic gravitational potentials since two rotation curves can be measured in two perpend…

astro-ph.GA2013★ 208 cited

ARGOS IV: The Kinematics of the Milky Way Bulge

M. Ness, K. Freeman, E. Athanassoula +8

We present the kinematic results from our ARGOS spectroscopic survey of the Galactic bulge of the Milky Way. Our aim is to understand the formation of the Galactic bulge. We examin…

astro-ph.GA2013★ 58 cited

The relation between chemical abundances and kinematics of the Galactic disc with RAVE

C. Boeche, C. Chiappini, I. Minchev +20

Aims: We study the relations between stellar kinematics and chemical abundances of a large sample of RAVE giants in search for selection criteria needed for disentangling different…

astro-ph.GA2013★ 98 cited

The Comparative Chemical Evolution of an Isolated Dwarf Galaxy: A VLT and Keck Spectroscopic Survey of WLM

Ryan Leaman, Kim A. Venn, Alyson M. Brooks +8

Building on our previous spectroscopic and photometric analysis of the isolated Local Group dwarf irregular (dIrr) galaxy WLM, we present a comparison of the metallicities of its R…

astro-ph.GA2013★ 275 cited

The wobbly Galaxy: kinematics north and south with RAVE red clump giants

M. E. K. Williams, M. Steinmetz, J. Binney +23

The RAVE survey, combined with proper motions and distance estimates, can be used to study in detail stellar kinematics in the extended solar neighbourhood (solar suburb). Using th…