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42 papers · 2 filters
Modeling dust emission in the Magellanic Clouds with Spitzer and Herschel
Jeremy Chastenet, Caroline Bot, Karl D. Gordon +4
Dust modeling is crucial to infer dust properties and budget for galaxy studies. However, there are systematic disparities between dust grain models that result in corresponding sy…
Stars with fast Galactic rotation observed in Gaia TGAS: a signature driven by the Perseus arm?
Jason A. S. Hunt, Daisuke Kawata, Giacomo Monari +3
We report on the detection of a small overdensity of stars in velocity space with systematically higher Galactocentric rotation velocity than the Sun by about 20 km s in the…
Gemini/GRACES Spectroscopy of Stars in Triangulum II
K. A. Venn, E. Starkenburg, L. Malo +2
The chemical abundance ratios and radial velocities for two stars in the recently discovered Triangulum II faint dwarf galaxy have been determined from high resolution, medium sign…
Globular Clusters As Tracers of Fine Structure in the Dramatic Shell Galaxy NGC 474
Sungsoon Lim, Eric W. Peng, Pierre-Alain Duc +7
Globular clusters (GCs) are some of the most visible tracers of the merging and accretion history of galaxy halos. Metal-poor GCs, in particular, are thought to arrive in massive g…
Tracing the Hercules stream with Gaia and LAMOST: new evidence for a fast bar in the Milky Way
Giacomo Monari, Daisuke Kawata, Jason A. S. Hunt +1
The length and pattern speed of the Milky Way bar are still controversial. Photometric and spectroscopic surveys of the inner Galaxy, as well as gas kinematics, favour a long and s…
THE NEXT GENERATION VIRGO CLUSTER SURVEY. XIV. Shell feature early-type dwarf galaxies in the Virgo cluster
Sanjaya Paudel, Rory Smith, Pierre-Alain Duc +15
The Next Generation Virgo Cluster Survey is a deep (with a detection limit = 29~mag~arcsec in the band) optical panchromatic survey targeting the Virgo cluste…
A very dark stellar system lost in Virgo: kinematics and metallicity of SECCO1 with MUSE
G. Beccari, M. Bellazzini, L. Magrini +11
We present the results of VLT-MUSE integral field spectroscopy of SECCO1, a faint, star-forming stellar system recently discovered as the stellar counterpart of an Ultra Compact Hi…
Source clustering in the Hi-GAL survey determined using a minimum spanning tree method
Maxime Beuret, Nicolas Billot, Laurent Cambrésy +5
The aims are to investigate the clustering of the far-infrared sources from the Herschel infrared Galactic Plane Survey (Hi-GAL) in the Galactic longitude range of -71 to 67 deg. T…
Machine-Learned Identification of RR Lyrae Stars from Sparse, Multi-band Data: the PS1 Sample
Branimir Sesar, Nina Hernitschek, Sandra Mitrović +16
RR Lyrae stars may be the best practical tracers of Galactic halo (sub-)structure and kinematics. The PanSTARRS1 (PS1) survey offers multi-band, multi-epoch, precise photometr…
The Next Generation Virgo Cluster Survey (NGVS). XXIV. The Red Sequence to 10 L and Comparisons with Galaxy Formation Models
Joel C. Roediger, Laura Ferrarese, Patrick Côté +22
We use deep optical photometry from the Next Generation Virgo Cluster Survey [NGVS] to investigate the color-magnitude diagram for the galaxies inhabiting the core of this cluster.…
Staying away from the bar: the local dynamical signature of slow and fast bars in the Milky Way
Giacomo Monari, Benoit Famaey, Arnaud Siebert +3
Both the three-dimensional density of red clump giants and the gas kinematics in the inner Galaxy indicate that the pattern speed of the Galactic bar could be much lower than previ…
Understanding active galactic nuclei using near-infrared high angular resolution polarimetry I : MontAGN - stokes comparison
Lucas Grosset, Frédéric Marin, Damien Gratadour +5
In this first research note of a series of two, we present a comparison between two Monte Carlo radiative transfer codes: MontAGN and STOKES. Both were developed in order to better…
The PAndAS view of the Andromeda satellite system - II. Detailed properties of 23 M31 dwarf spheroidal galaxies
Nicolas F. Martin, Rodrigo A. Ibata, Geraint F. Lewis +15
We present a comprehensive analysis of the structural properties and luminosities of the 23 dwarf spheroidal galaxies that fall within the footprint of the Pan-Andromeda Archaeolog…
The location, clustering, and propagation of massive star formation in giant molecular clouds
B. B. Ochsendorf, M. Meixner, J. Chastenet +2
Massive stars are key players in the evolution of galaxies, yet their formation pathway remains unclear. In this work, we use data from several galaxy-wide surveys to build an unbi…
SMASH 1: a very faint globular cluster disrupting in the outer reaches of the LMC?
Nicolas F. Martin, Valentin Jungbluth, David L. Nidever +20
We present the discovery of a very faint stellar system, SMASH 1, that is potentially a satellite of the Large Magellanic Cloud. Found within the Survey of the MAgellanic Stellar H…
RAVE stars in K2 - I. Improving RAVE red giants spectroscopy using asteroseismology from K2 Campaign 1
M. Valentini, C. Chiappini, G. R. Davies +29
We present a set of 87 RAVE stars with detected solar like oscillations, observed during Campaign 1 of the K2 mission (RAVE K2-C1 sample). This dataset provides a useful benchmark…
An Ultra-Faint Galaxy Candidate Discovered in Early Data from the Magellanic Satellites Survey
A. Drlica-Wagner, K. Bechtol, S. Allam +21
We report a new ultra-faint stellar system found in Dark Energy Camera data from the first observing run of the Magellanic Satellites Survey (MagLiteS). MagLiteS J0644-5953 (Pictor…
New Constraints on a complex relation between globular cluster colors and environment
Mathieu Powalka, Thomas H. Puzia, Ariane Lançon +25
We present an analysis of high-quality photometry for globular clusters (GCs) in the Virgo cluster core region, based on data from the Next Generation Virgo Cluster Survey (NGVS) p…
A Synoptic Map of Halo Substructures from the Pan-STARRS1 3π Survey
Edouard J. Bernard, Annette M. N. Ferguson, Edward F. Schlafly +18
We present a panoramic map of the entire Milky Way halo north of dec~-30 degrees (~30,000 deg^2), constructed by applying the matched-filter technique to the Pan-STARRS1 3Pi Survey…
Faint Dwarf Galaxies in Hickson Compact Group 90
Yasna Ordenes-Briceño, Matthew A. Taylor, Thomas H. Puzia +11
We report the discovery of a very diverse set of five low-surface brightness (LSB) dwarf galaxy candidates in Hickson Compact Group 90 (HCG 90) detected in deep U- and I-band image…
The Next Generation Virgo cluster Survey (NGVS). XXV. Fiducial panchromatic colors of Virgo core globular clusters and their comparison to model predictions
Mathieu Powalka, Ariane Lançon, Thomas H. Puzia +17
The central region of the Virgo cluster of galaxies contains thousands of globular clusters (GCs), an order of magnitude more than the numbers found in the Local Group. Relics of e…
Understanding the internal dynamics of elliptical galaxies without non-baryonic dark matter
J. Dabringhausen, P. Kroupa, B. Famaey +1
Assuming virial equilibrium and Newtonian dynamics, low-mass early-type galaxies have larger velocity dispersions than expected from the amount of baryons they contain. The convent…
The Survey of Centaurus A's Baryonic Structures (SCABS). II. The Extended Globular Cluster System of NGC5128 and its Nearby Environment
Matthew A. Taylor, Thomas H. Puzia, Roberto P. Muñoz +5
Wide-field Dark Energy Camera observations centred on the giant elliptical galaxy NGC5128 covering are used to compile a new catalogue of glob…
The MIXR sample: AGN activity versus star formation across the cross-correlation of WISE, 3XMM, and FIRST/NVSS
B. Mingo, M. G. Watson, S. R. Rosen +7
We cross-correlate the largest available Mid-Infrared (WISE), X-ray (3XMM) and Radio (FIRST+NVSS) catalogues to define the MIXR sample of AGN and star-forming galaxies. We pre-clas…