Publications by Myriam Arnal Rodrigues

MOSAIC: the ELT Multi-Object Spectrograph

Proceedings of SPIE Society of Photo-optical Instrumentation Engineers (2018)

P Jagourel, E Fitzsimons, F Hammer, F de Frondat Laadim, M Puech, CJ Evans, I Guinouard, F Chemla, M Frotin, Y Yang, P Parr-Burman, T Morris, M Dubbeldam, M Close, K Middleton, G Rousset, E Gendron, A Kelz, A Janssen, J Pragt, R Navarro, M Larrieu, K El Hadi, K Dohlen

Following a successful Phase A study, we introduce the delivered conceptual design of the MOSAIC1 multi-object spectrograph for the ESO Extremely Large Telescope (ELT). MOSAIC will provide R~5000 spectroscopy over the full 460-1800 nm range, with three additional high-resolution bands (R~15000) targeting features of particular interest. MOSAIC will combine three operational modes, enabling integrated-light observations of up to 200 sources on the sky (high-multiplex mode) or spectroscopy of 10 spatially-extended fields via deployable integral-field units: MOAO6 assisted high-definition (HDM) and Visible IFUs (VIFU). We will summarise key features of the sub-systems of the design, e.g. the smart tiled focal-plane for target selection and the multi-object adaptive optics used to correct for atmospheric turbulence, and present the next steps toward the construction phase.

The ELT-MOS (MOSAIC): Towards the construction phase

Ground-based and Airborne Instrumentation for Astronomy VII Society of Photo-optical Instrumentation Engineers (2018)

S Morris, F Hammer, P Jagourel, G Dalton, M Rodrigues, I Lewis

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 multiplex and a multi-Integral Field Unit (Multi-IFU) capability. It will be the fastest way to spectroscopically follow-up the faintest sources, probing the reionisation epoch, as well as evaluating the evolution of the dwarf mass function over most of the age of the Universe. MOSAIC will be world-leading in generating an inventory of both the dark matter (from realistic rotation curves with MOAO fed NIR IFUs) and the cool to warm-hot gas phases in z=3.5 galactic haloes (with visible wavelenth IFUs). Galactic archaeology and the first massive black holes are additional targets for which MOSAIC will also be revolutionary. MOAO and accurate sky subtraction with fibres have now been demonstrated on sky, removing all low Technical Readiness Level (TRL) items from the instrument. A prompt implementation of MOSAIC is feasible, and indeed could increase the robustness and reduce risk on the ELT, since it does not require diffraction limited adaptive optics performance. Science programmes and survey strategies are currently being investigated by the Consortium, which is also hoping to welcome a few new partners in the next two years.

Simulating surveys for ELT-MOSAIC: Status of the MOSAIC science case after phase A

Ground-based and Airborne Instrumentation for Astronomy VII Society of Photo-optical Instrumentation Engineers (2018)

M Puech, CJ Evans, K Disseau, J Japelj, OH Ramirez-Agudelo, H Rahmani, M Trevisan, JL Wang, M Rodrigues, R Sanchez-Janssen, Y Yang, F Hammer, L Kaper, SL Morris, B Barbuy, J-G Cuby, G Dalton, E Fitzsimmons, P Jagourel

We present the consolidated scientific case for multi-object spectroscopy with the MOSAIC concept on the European ELT. The cases span the full range of ELT science and require either ‘high multiplex’ or ‘high definition’ observations to best exploit the excellent sensitivity and wide field-of-view of the telescope. Following scientific prioritisation by the Science Team during the recent Phase A study of the MOSAIC concept, we highlight four key surveys designed for the instrument using detailed simulations of its scientific performance. We discuss future ways to optimise the conceptual design of MOSAIC in Phase B, and illustrate its competitiveness and unique capabilities by comparison with other facilities that will be available in the 2020s.

Building the HARMONI engineering model

Proceedings of SPIE Society of Photo-optical Instrumentation Engineers 10702 (2018)

T Foster, J Capone, A Earle, A Hidalgo, I Lewis, J Lynn, K O'Brien, M Rodrigues, I Tosh, B Watkins, F Clarke, H Schnetler, M Tecza, N Thatte

HARMONI (High Angular Resolution MOnolithic Integral field spectrograph)1 is a planned first-light integral field spectrograph for the Extremely Large Telescope. The spectrograph sub-system is being designed, developed, and built by the University of Oxford. The project has just completed the Preliminary Design Review (PDR), with all major systems having nearly reached a final conceptual design. As part of the overall prototyping and assembly, integration, and testing (AIT) of the HARMONI spectrograph, we will be building a full-scale engineering model of the spectrograph. This will include all of the moving and mechanical systems, but without optics. Its main purpose is to confirm the AIT tasks before the availability of the optics, and the system will be tested at HARMONI cryogenic temperatures. By the time of the construction of the engineering model, all of the individual modules and mechanisms of the spectrograph will have been prototyped and cryogenically tested. The lessons learned from the engineering model will then be fed back into the overall design of the spectrograph modules ahead of their development.

The HARMONI/ELT spectrographs


M Rodrigues, J Capone, A Earle, T Foster, A Hidalgo, I Lewis, J Lynn, K O'brien, I Tosh, EM George, M Accardo, D Alvarez, R Conzelmann, J Hopgood, F Clarke, H Schnetler, M Tecza, N Thatte

Near infrared throughput and stray light measurements of diffraction gratings for ELT-HARMONI

Proceedings of SPIE Society of Photo-optical Instrumentation Engineers 10706 (2018)

M Rodrigues, J Capone, F Clarke, A Earle, T Foster, J Lynn, K Obrien, M Tecza, NA Thatte, I Tosh, A Hidalgo Valadez, IJ Lewis

A Two-dimensional Spectroscopic Study of Emission-line Galaxies in the Faint Infrared Grism Survey (FIGS). I. Detection Method and Catalog


N Pirzkal, B Rothberg, RE Ryan, S Malhotra, J Rhoads, N Grogin, E Curtis-Lake, J Chevallard, S Charlot, SL Finkelstein, AM Koekemoer, P Ghavamian, M Rodrigues, F Hammer, M Puech, RL Larson, L Christensen, A Cimatti, I Ferreras, JP Gardner, C Gronwall, NP Hathi, B Joshi, H Kuntschner, GR Meurer, RW O'Connell, G Oestlin, A Pasquali, J Pharo, AN Straughn, JR Walsh, D Watson, RA Windhorst, NL Zakamska

Testing the hierarchical assembly of massive galaxies using accurate merger rates out to z similar to 1.5


M Rodrigues, M Puech, H Flores, F Hammer, N Pirzkal

Most pseudo-bulges can be formed at later stages of major mergers

Monthly Notices of the Royal Astronomical Society Oxford University Press 473 (2018) 2521-2541

T Sauvaget, F Hammer, M Puech, YB Yang, H Flores, M Rodrigues

Most giant spiral galaxies have pseudo or disc-like bulges that are considered to be the result of purely secular processes. This may challenge the hierarchical scenario predicting about one major merger per massive galaxy (>3 × 1010 M⊙) since the last ∼9 billion years. Here, we verify whether or not the association between pseudo-bulges and secular processes is irrevocable. Using GADGET2N-body/SPH simulations, we have conducted a systematic study of remnants of major mergers for which progenitors have been selected (1) to follow the gas richness-look back time relationship, and (2) with a representative distribution of orbits and spins in a cosmological frame. Analysing the surface mass density profile of both nearby galaxies and merger remnants with two components, we find that most of them show pseudo-bulges or bar dominated centres. Even if some orbits lead to classical bulges just after the fusion, the contamination by the additional gas that gradually accumulates to the centre and forming stars later on, leads to remnants apparently dominated by pseudo-bulges. We also found that simple smoothed particle hydrodynamics (SPH) simulations should be sufficient to form realistic spiral galaxies as remnants of ancient gas-rich mergers without the need for specifically tuned feedback conditions. We then conclude that pseudo-bulges and bars in spiral galaxies are natural consequences of major mergers when they are realized in a cosmological context, i.e. with gas-rich progenitors as expected when selected in the distant Universe.

A novel approach for the development of the HARMONI Integral Field Spectrograph using structured systems thinking


H Schnetler, F Clarke, M Rodrigues

Rising MOONS: an update on the VLT's next multi-object spectrograph as it begins to grow


W Taylor, M Cirasuolo, J Afonso, M Carollo, C Evans, H Flores, R Maiolino, S Paltani, L Vanzi, M Abreu, J-P Amans, D Atkinson, J Barrett, S Beard, C Bechet, M Black, D Boettger, S Brierley, D Buscher, A Cabral, W Cochrane, J Coelho, M Colling, R Conzelmann, F Dalessio, L Dauvin, G Davidson, H Drass, R Dunner, A Fairley, G Fasola, D Ferruzzi, M Fisher, M Flores, B Garilli, J Gaudemard, O Gonzalez, I Guinouard, P Gutierrez, P Hammersley, R Haigron, C Haniff, M Hayati, D Ives, O Iwert, P Laporte, D Lee, GL Causi, Y Luco, A Macleod, V Mainieri, C Maire, B-T Melse, J Nix, E Oliva, A Oliveira, L Origlia, I Parry, F Pedichini, R Piazzesi, P Rees, F Reix, M Rodrigues, F Rojas, S Rota, F Royer, P Santos, R Schnell, T-C Shen, M Sordet, J Strachan, X Sun, G Tait, M Torres, A Tozzi, S Tulloch, A Valenzuela Navarro, L Von Dran, C Waring, S Watson, B Woodward, Y Yang

Studying Distant Galaxies


F Hammer, M Puech, H Flores, M Rodrigues

Studying distant galaxies: A Handbook of Methods and Analyses

, 2017

F Hammer, M Puech, H Flores, M Rodrigues

The Era of Monster Formation: Peering into the Heart of ULIRGs out to z 1

American Astronomical Society, AAS Meeting (2017)

B Rothberg, N Pirzkal, J Fischer, M Rodrigues

The 5 Gyr evolution of sub-M galaxies


K Disseau, M Puech, F Hammer, H Flores, Y Yang, M Rodrigues

Morpho-kinematics of z similar to 1 galaxies probe the hierarchical scenario


M Rodrigues, F Hammer, H Flores, M Puech, E Athanassoula

Science requirements and trade-offs for the MOSAIC instrument for the European ELT

Proceedings of SPIE Society of Photo-optical Instrumentation Engineers 9908 (2016)

CJ Evans, M Puech, M Rodrigues, B Barbuy, J-G Cuby, G Dalton, E Fitzsimons, F Hammer, P Jagourel, L Kaper, SL Morris, TJ Morris

Building on the comprehensive White Paper on the scientific case for multi-object spectroscopy on the European ELT, we present the top-level instrument requirements that are being used in the Phase A design study of the MOSAIC concept. The assembled cases span the full range of E-ELT science and generally require either ‘high multiplex' or 'high definition' observations to best exploit the excellent sensitivity and spatial performance of the telescope. We highlight some of the science studies that are now being used in trade-off studies to inform the capabilities of MOSAIC and its technical design.

Developing an integrated concept for the E-ELT Multi-Object Spectrograph (MOSAIC): design issues and trade-offs

Proceedings of SPIE Society of Photo-optical Instrumentation Engineers 9908 (2016)

M Rodrigues, G Dalton, E Fitzsimons, F Chemla, T Morris, F Hammer, M Puech, CJ Evans, P Jagourel

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. MOSAIC aims to address the combined science cases for E-ELT MOS that arose from the earlier studies of the multi-object and multi-adaptive optics instruments. MOSAIC combines the advantages of a highly-multiplexed instrument targeting single-point objects with one which has a more modest multiplex but can spatially resolve a source with high resolution (IFU). These will span across two wavebands: visible and near-infrared.

The E-ELT Multi-Object Spectrograph: latest news from MOSAIC

Proceedings of SPIE Society of Photo-optical Instrumentation Engineers 9908 (2016)

F Hammer, SL Morris, L Kaper, B Barbuy, J-G Cuby, MM Roth, P Jagourel, CJ Evans, M Puech, E Fitzsimons, G Dalton, M Rodrigues

<p>There are 8000 galaxies, including 1600 at z≥ 1.6, which could be simultaneously observed in an E-ELT field of view of 40 arcmin^2. A considerable fraction of astrophysical discoveries require large statistical samples, which can only be obtained with multi-object spectrographs (MOS). MOSAIC will provide a vast discovery space, enabled by a multiplex of 200 and spectral resolving powers of R=5000 and 20000. MOSAIC will also offer the unique capability of more than 10 `high-definition' (multi-object adaptive optics, MOAO) integral-field units, optimised to investigate the physics of the sources of reionization. The combination of these modes will make MOSAIC the world-leading MOS facility, contributing to all fields of contemporary astronomy, from extra-solar planets, to the study of the halo of the Milky Way and its satellites, and from resolved stellar populations in nearby galaxies out to observations of the earliest ‘first-light’ structures in the Universe. It will also study the distribution of the dark and ordinary matter at all scales and epochs of the Universe.</p> <br/> <p>Recent studies of critical technical issues such as sky-background subtraction and MOAO have demonstrated that such a MOS is feasible with state-of-the-art technology and techniques. Current studies of the MOSAIC team include further trade-offs on the wavelength coverage, a solution for compensating for the non-telecentric new design of the telescope, and tests of the saturation of skylines especially in the near-IR bands. In the 2020s the E-ELT will become the world's largest optical/IR telescope, and we argue that it has to be equipped as soon as possible with a MOS to provide the most efficient, and likely the best way to follow-up on James Webb Space Telescope (JWST) observations.</p>

Nearby supernova host galaxies from the CALIFA survey

Astronomy & Astrophysics EDP Sciences 591 (2016) A48-A48

L Galbany, V Stanishev, AM Mourão, M Rodrigues, H Flores, CJ Walcher, SF Sánchez, R García-Benito, D Mast, C Badenes, RM González Delgado, C Kehrig, M Lyubenova, RA Marino, M Mollá, S Meidt, E Pérez, G van de Ven, JM Vílchez