Spiral Galaxies: Evolution and Consequences

    General
    Description

    Our small group is well known and respected internationally for our innovative and important work on various aspects of the structure and evolution of nearby spiral galaxies. We primarily use observations at various wavelengths, exploiting synergies that allow us to answer the most pertinent questions relating to what the main properties of galaxies are, and how galaxies have evolved to their current state. We use imaging and spectroscopy, at UV, optical, infrared, millimetre, and radio wavelengths, fully exploiting observing facilities available to us in Spain, at ESO, or elsewhere, along with state-of-the-art analysis tools. The success of this approach can be measured from the employment opportunities offered to ex-members of the group, from the number and quality of collaborations with leading external scientists, from continued citation of our published work, and from invitations to co-organise or speak at the leading international conferences in the field.

    In the last few years our group has put a lot of effort into opening up joint research lines with computer scientists, recognising the paradigm shift that is upon us due to the enormous quantities of data that will soon be produced by facilities such as LSST, Euclid, and SKA. We collaborate with computer scientists and aim to prepare the analysis tools, including detection of structure from noise, correction for scattered light and Galactic cirrus, and the use of machine learning-based techniques, so that once LSST (2020) and Euclid (2023) start releasing their huge data sets, our group is ready to analyse them and extract the science from the oceans of bytes.

    Principal investigator
    Project staff
    1. From thermal and non-thermal radio maps of the centre of NGC 1097, we discovered that the massive star formation is quenched by non-thermal effects, including pressure from the magnetic field, cosmic rays and turbulence.
    2. In the centre of NGC 7742, we found a slightly warped inner disk, and two separate stellar components: an old population that counter-rotates with the gas, and a young one, concentrated to the ring, that co-rotates with the gas.
    3. We re-analysed our deep IR imaging of thick disks to correct for the extended S4G point spread function (PSF), confirming all our previous results and in particular confirming the significant mass present in the thick disk component.
    4. Analysing a new high-resolution e-MERLIN 1.5 GHz radio continuum map together with HST and SDSS imaging of NGC 5322, an elliptical galaxy hosting radio jets, we found that the low-luminosity AGN/jet-driven feedback may have quenched the late-time nuclear star formation promptly.
    5. From MUSE observations of low-surface-brightness Lyman-α emission surrounding faint galaxies at redshifts between 3 and 6 we find that the projected sky coverage approaches 100 per cent.

    Related publications

    Delayed Star Formation in Isolated Dwarf galaxies: Hubble Space Telescope Star Formation History of the Aquarius Dwarf Irregular 2014ApJ...795...54C
    Spitzer/Infrared Array Camera near-infrared features in the outer parts of S4G galaxies 2014MNRAS.444.3015L
    Optical imaging for the Spitzer Survey of Stellar Structure in Galaxies. Data release and notes on interacting galaxies 2014A&A...569A..91K
    Reconstructing the Stellar Mass Distributions of Galaxies Using S4G IRAC 3.6 and 4.5 μm Images. II. The Conversion from Light to Mass 2014ApJ...788..144M
    Stellar haloes outshine disc truncations in low-inclined spirals 2014MNRAS.441.2809M
    Morphology and environment of galaxies with disc breaks in the S4G and NIRS0S 2014MNRAS.441.1992L
    The Baryonic Tully-Fisher Relationship for S4G Galaxies and the "Condensed" Baryon Fraction of Galaxies 2014AJ....147..134Z
    ARRAKIS: atlas of resonance rings as known in the S4G 2014A&A...562A.121C
    Unveiling the Structure of Barred Galaxies at 3.6 μm with the Spitzer Survey of Stellar Structure in Galaxies (S4G). I. Disk Breaks 2014ApJ...782...64K
    The circumnuclear environment of NGC 613: a nuclear starburst caught in the act? 2014MNRAS.438..329F
    Morphological Parameters of a Spitzer Survey of Stellar Structure in Galaxies 2014ApJ...781...12H
    Embedded Star Formation in S4G Galaxy Dust Lanes 2014ApJ...780...32E
    Interlocking Resonance Patterns in Galaxy Disks 2014ApJS..210....2F
    Shock Excited Molecules in NGC 1266: ULIRG Conditions at the Center of a Bulge-dominated Galaxy 2013ApJ...779L..19P
    Massive star formation in galaxies with excess ultraviolet emission 2013MNRAS.436.3135E
    The bifurcated age-metallicity relation of Milky Way globular clusters and its implications for the accretion history of the galaxy 2013MNRAS.436..122L
    The James Clerk Maxwell Telescope Nearby Galaxies Legacy Survey - IX. 12CO J = 3→2 observations of NGC 2976 and NGC 3351 2013MNRAS.436..921T
    X-Ray Nuclear Activity in S4G Barred Galaxies: No Link between Bar Strength and Co-occurrent Supermassive Black Hole Fueling 2013ApJ...776...50C
    The Ages of 55 Globular Clusters as Determined Using an Improved \Delta V^HB_TO Method along with Color-Magnitude Diagram Constraints, and Their Implications for Broader Issues 2013ApJ...775..134V
    On the Origin of Lopsidedness in Galaxies as Determined from the Spitzer Survey of Stellar Structure in Galaxies (S4G) 2013ApJ...772..135Z
    The Impact of Bars on Disk Breaks as Probed by S4G Imaging 2013ApJ...771...59M
    The Comparative Chemical Evolution of an Isolated Dwarf Galaxy: A VLT and Keck Spectroscopic Survey of WLM 2013ApJ...767..131L
    The 2011 Periastron Passage of the Be Binary δ Scorpii 2013ApJ...766..119M
    Hydrogen volume densities in nearby galaxies - I. An automated approach 2013MNRAS.428.3355H
    Hα kinematics of S4G spiral galaxies - I. NGC 864 2012MNRAS.427.2938E
    A unified picture of breaks and truncations in spiral galaxies from SDSS and S4G imaging 2012MNRAS.427.1102M
    Spectral Energy Distributions of Type 1 Active Galactic Nuclei in the COSMOS Survey. I. The XMM-COSMOS Sample 2012ApJ...759....6E
    Breaks in Thin and Thick Disks of Edge-on Galaxies Imaged in the Spitzer Survey Stellar Structure in Galaxies (S4G) 2012ApJ...759...98C
    Unveiling the Nature of M94's (NGC4736) Outer Region: A Panchromatic Perspective 2009ApJ...704..618T
    Thick Disks of Edge-on Galaxies Seen through the Spitzer Survey of Stellar Structure in Galaxies (S4G): Lair of Missing Baryons? 2011ApJ...741...28C
    The Unusual Vertical Mass Distribution of NGC 4013 Seen through the Spitzer Survey of Stellar Structure in Galaxies (S4G) 2011ApJ...738L..17C
    The Thick Disk in the Galaxy NGC 4244 from S4G Imaging 2011ApJ...729...18C
    The S4G Perspective on Circumstellar Dust Extinction of Asymptotic Giant Branch Stars in M100 2012ApJ...748L..30M
    The JCMT Nearby Galaxies Legacy Survey. VI. The distribution of gas and star formation in M 81 2011A&A...527A..16S
    The JCMT Nearby Galaxies Legacy Survey - VIII. CO data and the LCO(3-2)-LFIR correlation in the SINGS sample 2012MNRAS.424.3050W
    The JCMT Nearby Galaxies Legacy Survey - VII. Hα imaging and massive star formation properties 2012MNRAS.422.3208S
    The JCMT Nearby Galaxies Legacy Survey - V. The CO(J= 3-2) distribution and molecular outflow in NGC 4631 2011MNRAS.410.1423I
    The JCMT Nearby Galaxies Legacy Survey - IV. Velocity dispersions in the molecular interstellar medium in spiral galaxies 2011MNRAS.410.1409W
    The JCMT Nearby Galaxies Legacy Survey - III. Comparisons of cold dust, polycyclic aromatic hydrocarbons, molecular gas and atomic gas in NGC 2403 2010MNRAS.402.1409B
    The James Clerk Maxwell Telescope Nearby Galaxies Legacy Survey. II. Warm Molecular Gas and Star Formation in Three Field Spiral Galaxies 2010ApJ...714..571W

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