Molecular Gas and Dust in Galaxies Across Cosmic Time

Start year
2015
Organizational Unit
    General
    Description

    Two of the most fundamental questions in astrophysics are the conversion of molecular gas into stars and how this physical process is a function of environments on all scales, ranging from planetary systems, stellar clusters, galaxies to galaxy clusters. The main goal of this internal project is to get insight into the formation and evolution of galaxies from the cold interstellar medium. This is achieved by probing the cold molecular gas, the fuel of star formation, and dust, the by-product of this formation process, in galaxies across cosmic time. The studies are mainly based on observations in the far-infrared and radio wavelength regime with a special focus on radio interferometric observations with state-of-the art telescopes such as NOEMA, ALMA, ATCA, VLA and SMA. There will be close interrelation with other internal research projects e.g., providing our expertise on radio (interferometric) observations of galaxies. The research group will characterize the star-formation properties of massive galaxies in the distant universe at different epochs enabling us to study the formation sequence of star-forming galaxies. Furthermore, to probe the environmental-dependent evolution, the investigated sources are selected from galaxy clusters and the field. In addition, complementary studies of nearby galaxies (selected from CALIFA and WEAVE-APERTIF) serve as a local reference sample for future studies of high-redshift galaxies.

    Principal investigator
    Project staff
    1. Follow-up observations of a lensed dusty starburst galaxy at z=2.04 with the radio interferometer IRAM NOEMA discovered extreme molecular gas properties and revealed the brightest emission in molecular gas ever seen in the distant universe; Dannerbauer et al. 2019, AJ, in press (astro-ph/1812.03845)..
    2. Contrubution with several articles as co-author (part of international collaborations) of the study of galaxy cluster in formation and its members via multi-wavelenth observations.
    3. Obtaining external funding from 'plan nacional' by MINECO for 2018 and 2019 including funding of a two-years postdoc (AYA2017-84061-P: ´From the first over-densitities to proto-clusters and clusters: The role of the environment´, 141.570 Euro, IP1: H. Dannerbauer, IP2: J. M. Rodriguez-Espinosa).
    4. Obtaining observing time to continue and the finish the ATCA Large Program 'COALAS: CO ATCA Legacy Archive of Star-Forming Galaxies' (PI: Helmut Dannerbauer), in total 640 hrs. (~500.000 Euro). IRAM NOEMA Large Program ‘A Comprehensive NOEMA Redshift Survey of the Brightest Herschel Galaxies’ (CoPI: Dannerbauer) approved, 191 hrs. (~770.000 Euro).
    5. Organization of the mini-synposium 'Build-Up of Galaxy Clusters' during the IAU XXX General Assembly in Vienna in August 2018 and of the splinter meeting "Collaborative GTC-LMT project" during the GTC conference in Valencia in December 2018.

    Related publications

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      How much gas and dust is contained in high-redshift quiescent galaxies (QGs) is currently an open question with relatively few and contradictory answers, as well as important implications for our understanding of the nature of star formation quenching processes at cosmic noon. Here we revisit far-infrared (FIR) observations of the REQUIEM-ALMA

      Gobat, R. et al.

      Advertised on:

      12
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      Citations
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    • The GLEAMing of the first supermassive black holes: II. A new sample of high-redshift radio galaxy candidates

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      Broderick, J. W. et al.

      Advertised on:

      11
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    • The 700 ks Chandra Spiderweb Field. II. Evidence for inverse-Compton and thermal diffuse emission in the Spiderweb galaxy

      Aims: We present the X-ray imaging and spectral analysis of the diffuse emission around the radio galaxy J1140-2629 (the Spiderweb galaxy) at z = 2.16 and of its nuclear emission, based on a deep (700 ks) Chandra observation. Methods: We obtained a robust characterization of the unresolved nuclear emission, and carefully computed the contamination

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      11
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    • High-z Sudoku: a diagnostic tool for identifying robust (sub)mm redshifts

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      9
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    • The 700 ks Chandra Spiderweb Field. I. Evidence for widespread nuclear activity in the protocluster

      Aims: We present an analysis of the 700 ks Chandra ACIS-S observation of the field around the radio galaxy J1140-2629 (the Spiderweb Galaxy) at z = 2.156, focusing on the nuclear activity in the associated large-scale environment. Methods: We identified unresolved X-ray sources in the field down to flux limits of 1.3 × 10−16 and 3.9 × 10−16 erg s−1

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      6
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    • Tomography of the environment of the COSMOS/AzTEC-3 submillimeter galaxy at z ∼ 5.3 revealed by Lyα and MUSE observations

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      4
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    • Submillimetre galaxies in two massive protoclusters at z = 2.24: witnessing the enrichment of extreme starbursts in the outskirts of HAE density peaks

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      6
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    • The bright extragalactic ALMA redshift survey (BEARS) I: redshifts of bright gravitationally lensed galaxies from the Herschel ATLAS

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      Urquhart, S. A. et al.

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      4
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    • Feeding the spider with carbon. [CII] emission from the circumgalactic medium and active galactic nucleus

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      2
      2022
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      10
    • A high-resolution investigation of the multiphase ISM in a galaxy during the first two billion years

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      3
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    • Milky Way-like Gas Excitation in an Ultrabright Submillimeter Galaxy at z = 1.6

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      Sulzenauer, N. et al.

      Advertised on:

      12
      2021
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    • Dark Energy Survey Year 3 Results: Galaxy mock catalogs for BAO analysis

      The calibration and validation of scientific analysis in simulations is a fundamental tool to ensure unbiased and robust results in observational cosmology. In particular, mock galaxy catalogs are a crucial resource to achieve these goals in the measurement of baryon acoustic oscillation (BAO) in the clustering of galaxies. Here we present a set of

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      Advertised on:

      12
      2021
      Citations
      11
    • Discovery of a Protocluster Core Associated with an Enormous Lya Nebula at z = 2.3

      The MAMMOTH-1 nebula at z = 2.317 is an enormous Lyα nebula (ELAN) extending to a ~440 kpc scale at the center of the extreme galaxy overdensity BOSS 1441. In this paper, we present observations of the CO(3 - 2) and 250 GHz dust-continuum emission from MAMMOTH-1 using the IRAM NOrthern Extended Millimeter Array. Our observations show that CO(3 - 2)

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      Advertised on:

      12
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    • Probing Galaxy Evolution in Massive Clusters Using ACT and DES: Splashback as a Cosmic Clock

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      Advertised on:

      12
      2021
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    • Microwave spectro-polarimetry of matter and radiation across space and time

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      6
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    • The Evolving Interstellar Medium of Star-forming Galaxies, as Traced by Stardust

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      Kokorev, Vasily I. et al.

      Advertised on:

      11
      2021
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    • The effect of active galactic nuclei on the cold interstellar medium in distant star-forming galaxies

      In the framework of a systematic study with the ALMA interferometer of IR-selected main-sequence and starburst galaxies at z ∼ 1 − 1.7 at typical ∼1″ resolution, we report on the effects of mid-IR- and X-ray-detected active galactic nuclei (AGN) on the reservoirs and excitation of molecular gas in a sample of 55 objects. We find widespread

      Valentino, F. et al.

      Advertised on:

      10
      2021
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      12
    • Submillimetre compactness as a critical dimension to understand the main sequence of star-forming galaxies

      We study the interstellar medium (ISM) properties as a function of the molecular gas size for 77 infrared-selected galaxies at z ~ 1.3, having stellar masses 109.4 ≲ M⋆ ≲ 1012.0 M⊙ and star formation rates 12 ≲ SFRFIR ≲ 1000 M⊙ yr-1. Molecular gas sizes are measured on ALMA images that combine CO(2-1), CO(5-4), and underlying continuum observations

      Puglisi, Annagrazia et al.

      Advertised on:

      12
      2021
      Citations
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    • Dark Energy Survey year 3 results: covariance modelling and its impact on parameter estimation and quality of fit

      We describe and test the fiducial covariance matrix model for the combined two-point function analysis of the Dark Energy Survey Year 3 (DES-Y3) data set. Using a variety of new ansatzes for covariance modelling and testing, we validate the assumptions and approximations of this model. These include the assumption of Gaussian likelihood, the

      Friedrich, O. et al.

      Advertised on:

      12
      2021
      Citations
      60
    • The mass and galaxy distribution around SZ-selected clusters

      We present measurements of the radial profiles of the mass and galaxy number density around Sunyaev-Zel'dovich (SZ)-selected clusters using both weak lensing and galaxy counts. The clusters are selected from the Atacama Cosmology Telescope Data Release 5 and the galaxies from the Dark Energy Survey Year 3 data set. With signal-to-noise ratio of 62

      Shin, T. et al.

      Advertised on:

      11
      2021
      Citations
      26

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