Publications (28)
A Two-Dimensional Spectroscopic Study of Emission Line Galaxies in the Faint Infrared Grism Survey (FIGS) I: Detection Method and Catalog
Norbert Pirzkal, Barry Rothberg, Russell E. Ryan +31
We present the results from the application of a two-dimensional emission line detection method, EMission-line two-Dimensional (EM2D), to the near-infrared G102 grism observations…
Could M31 be the result of a major merger?
Sylvain Fouquet, François Hammer, Yang-Bin Yang +3
We investigated a scenario in which M31 could be the remnant of a gas-rich major merger. Galaxy merger simulations, highly constrained by observations, were run using GADGET 2 in o…
The NGC 4013 tale: a pseudo-bulged, late-type spiral shaped by a major merger
Jianling Wang, Francois Hammer, Mathieu Puech +2
Many spiral galaxy haloes show stellar streams with various morphologies when observed with deep images. The origin of these tidal features is discussed, either coming from a satel…
EAGLE Spectroscopy of Resolved Stellar Populations Beyond the Local Group
Chris Evans, Yanbin Yang, Mathieu Puech +8
Valuable insights into galaxy evolution can be gleaned from studies of resolved stellar populations in the local Universe. Deep photometric surveys have provided tracers of the sta…
Considerations on how to investigate planes of satellite galaxies
Marcel S. Pawlowski, Jörg Dabringhausen, Benoit Famaey +11
The existence of a spatially thin, kinematically coherent Disk of Satellites (DoS) around the Milky Way (MW), is a problem that often garners vivacious debate in the literature or…
FALCON: a concept to extend adaptive optics corrections to cosmological fields
Francois Hammer, Mathieu Puech, Francois Assemat +6
FALCON is an original concept for a next generation spectrograph at ESO VLT or at future ELTs. It is a spectrograph including multiple small integral field units (IFUs) which can b…
The ELT-MOS (MOSAIC): towards the construction phase
Simon Morris, François Hammer, Pascal Jagourel +50
When combined with the huge collecting area of the ELT, MOSAIC will be the most effective and flexible Multi-Object Spectrograph (MOS) facility in the world, having both a high mul…
Galactic forces rule dynamics of Milky Way dwarf galaxies
Francois Hammer, Yanbin Yang, Frederic Arenou +4
Dwarf galaxies populating the Galactic halo are assumed to host the largest fractions of dark matter, as calculated from their velocity dispersions. Their major axes are preferenti…
The Detailed Science Case for the Maunakea Spectroscopic Explorer: the Composition and Dynamics of the Faint Universe
Alan McConnachie, Carine Babusiaux, Michael Balogh +173
MSE is an 11.25m aperture observatory with a 1.5 square degree field of view that will be fully dedicated to multi-object spectroscopy. More than 3200 fibres will feed spectrograph…
On the absence of dark matter in dwarf galaxies surrounding the Milky Way
Francois Hammer, Yanbin Yang, Jianling Wang +3
This paper presents an alternative scenario to explain the observed properties of the Milky Way dwarf Spheroidals (MW dSphs). We show that instead of resulting from large amounts o…
On-sky tests of sky-subtraction methods for fiber-fed spectrographs
Myriam Rodrigues, Michele Cirasuolo, Francois Hammer +8
We present preliminary results on on-sky test of sky subtraction methods for fiber-fed spectrograph. Using dedicated observation with FLAMES/VLT in I-band, we have tested the accur…
Time-average properties of major mergers: mergers significantly scatter high-z scaling relations
Mathieu Puech, Hector Flores, Myriam Rodrigues +2
Interpreting the scaling relations measured by recent large kinematic surveys of galaxies has remained hampered by large observational scatter. We show that the observed IS…
Co-orbiting satellite galaxy structures are still in conflict with the distribution of primordial dwarf galaxies
Marcel S. Pawlowski, Benoit Famaey, Helmut Jerjen +11
Both major galaxies in the Local Group host planar distributions of co-orbiting satellite galaxies, the Vast Polar Structure (VPOS) of the Milky Way and the Great Plane of Andromed…
The 5 Gyr evolution of sub-M* galaxies
Karen Disseau, Mathieu Puech, François Hammer +3
We gathered two complete samples of () galaxies, which are representative of the present-day galaxies and their counterparts at 5 Gyr a…
The vast thin plane of M31 co-rotating dwarfs: an additional fossil signature of the M31 merger and of its considerable impact in the whole Local Group
François Hammer, Yanbin Yang, Sylvain Fouquet +5
The recent discovery by Ibata et al. (2013) of a vast thin disk of satellites (VTDS) around M31 offers a new challenge for the understanding of the Local Group properties. This com…
EAGLE Spectroscopy of Resolved Stellar Populations Beyond the Local Group
Chris Evans, Yanbin Yang, Mathieu Puech +8
We give an overview of the science case for spectroscopy of resolved stellar populations beyond the Local Group with the European Extremely Large Telescope (E-ELT). In particular,…
Reproducing properties of MW dSphs as descendants of DM-free TDGs
Yanbin Yang, Francois Hammer, Sylvain Fouquet +4
The Milky Way (MW) dwarf spheroidal (dSph) satellites are known to be the most dark-matter (DM) dominated galaxies with estimates of dark to baryonic matter reaching even above one…
MOSAIC: the high-multiplex and multi-IFU spectrograph for the ELT
Rubén Sánchez-Janssen, Francois Hammer, Simon Morris +40
MOSAIC is the planned multi-object spectrograph for the 39m Extremely Large Telescope (ELT). Conceived as a multi-purpose instrument, it offers both high multiplex and multi-IFU ca…
Developing an integrated concept for the E-ELT Multi-Object Spectrograph (MOSAIC): design issues and trade-offs
Myriam Rodrigues, Gavin Dalton, Ewan Fitzsimons +6
We present a discussion of the design issues and trade-offs that have been considered in putting together a new concept for MOSAIC, the multi-object spectrograph for the E-ELT. MOS…
ELT-MOS White Paper: Science Overview & Requirements
Chris Evans, Mathieu Puech, Beatriz Barbuy +18
The workhorse instruments of the 8-10m class observatories have become their multi-object spectrographs (MOS), providing comprehensive follow-up to both ground-based and space-born…
A possible impact near the Milky Way of a former major merger in the Local Group
Sylvain Fouquet, François Hammer, Yanbin Yang +2
The Milky Way (MW) dwarf system presents two exceptional features, namely it forms a thick plane called the Vast Polar Structure (VPOS), and the two biggest dwarves, the Magellanic…
The ESO's Extremely Large Telescope Working Groups
Paolo Padovani, Michele Cirasuolo, Remco van der Burg +82
Since 2005 ESO has been working with its community and industry to develop an extremely large optical/infrared telescope. ESO's Extremely Large Telescope, or ELT for short, is a re…
Accurate Sky Continuum Subtraction with Fibre-fed Spectrographs
Yanbin Yang, Myriam Rodrigues, Mathieu Puech +10
Fibre-fed spectrographs now have throughputs equivalent to slit spectrographs. However, the sky subtraction accuracy that can be reached has often been pinpointed as one of the maj…
The Science of the Einstein Telescope
Adrian Abac, Raul Abramo, Simone Albanesi +485
Einstein Telescope (ET) is the European project for a gravitational-wave (GW) observatory of third-generation. In this paper we present a comprehensive discussion of its science ob…
Does the dwarf galaxy system of the Milky Way originate from Andromeda?
Sylvain Fouquet, François Hammer, Yanbin Yang +2
The Local Group is often seen to be a quiescent environment without significant merger events. However an ancient major merger may have occurred in the most massive galaxy. Numeric…
Toward a Complete Understanding of the Magellanic Stream Formation
Jianling Wang, Francois Hammer, Yanbin Yang +4
The Magellanic Clouds have lost most of their gas during their passage by the Milky Way, a property that has never been successfully modeled. Here we use accurate and mesh-free hyd…
The Science Case for Multi-Object Spectroscopy on the European ELT
Chris Evans, Mathieu Puech, Jose Afonso +68
This White Paper presents the scientific motivations for a multi-object spectrograph (MOS) on the European Extremely Large Telescope (E-ELT). The MOS case draws on all fields of co…
The Formation of Large Galactic Disks Through The Hierarchical Scenario: Further consequences
Francois Hammer, Yanbin Yang, Hector Flores +1
Using the deepest and most complete observations of distant galaxies, we investigate the progenitors of present-day large spirals. Observations include spatially-resolved kinematic…