Start year
2015
Organizational Unit
Grants related:
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.
Members
Principal investigator
Helmut
Dannerbauer
Project staff
Collaborators
Jesús
Falcón Barroso
José Alfonso
López Aguerri
Ismael
Pérez Fournon
Prof.
Rafael
Rebolo López
Dr.
Alberto Bolatto
Dr.
Caitlin Casey
Dr.
Carlos De Breuck
Dr.
Rob Ivison
Dr.
Bjorn Emonts
Dr.
Matt Lehnert
Dr.
Pablo Pérez-González
Dr.
Glenn van de Ven
Dr.
Wei-Hao Wang
Results
- 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)..
- 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.
- 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).
- 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).
- 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.
Scientific activity
Related publications
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An ALMA/NOEMA survey of the molecular gas properties of high-redshift star-forming galaxiesWe have used ALMA and NOEMA to study the molecular gas reservoirs in 61 ALMA-identified submillimetre galaxies (SMGs) in the COSMOS, UDS, and ECDFS fields. We detect 12CO ( $J_{\rm up} =$ 2-5) emission lines in 50 sources, and [C I]( 3P 1 - 3P 0) emission in eight, at $z =$ 1.2-4.8 and with a median redshift of 2.9 ± 0.2. By supplementing our dataBirkin, Jack E. et al.
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32021 -
Compact, bulge-dominated structures of spectroscopically confirmed quiescent galaxies at z ≍ 3We study structural properties of spectroscopically confirmed massive quiescent galaxies at z ≍ 3 with one of the first sizeable samples of such sources, made of ten 10.8 < log (M ⋆/M ☉) < 11.3 galaxies at 2.4 < z < 3.2 in the COSMOS field whose redshifts and quiescence are confirmed by Hubble Space Telescope (HST) grism spectroscopy. AlthoughLustig, Peter et al.
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22021 -
Machine Learning for Searching the Dark Energy Survey for Trans-Neptunian ObjectsIn this paper we investigate how implementing machine learning could improve the efficiency of the search for Trans-Neptunian Objects (TNOs) within Dark Energy Survey (DES) data when used alongside orbit fitting. The discovery of multiple TNOs that appear to show a similarity in their orbital parameters has led to the suggestion that one or moreHenghes, B. et al.
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12021 -
Dark Energy Survey year 3 results: point spread function modellingWe introduce a new software package for modelling the point spread function (PSF) of astronomical images, called PIFF (PSFs In the Full FOV), which we apply to the first three years (known as Y3) of the Dark Energy Survey (DES) data. We describe the relevant details about the algorithms used by PIFF to model the PSF, including how the PSF modelJarvis, M. et al.
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22021 -
Tracing the evolution of dust-obscured activity using sub-millimetre galaxy populations from STUDIES and AS2UDSWe analyse the physical properties of 121 SNR ≥ 5 sub-millimetre galaxies (SMGs) from the STUDIES 450 μm survey. We model their UV-to-radio spectral energy distributions using MAGPHYS+photo-z and compare the results to similar modelling of 850 μm-selected SMG sample from AS2UDS, to understand the fundamental physical differences between the twoDudzevičiūtė, U. et al.
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12021 -
The EDGE-CALIFA survey: exploring the role of molecular gas on galaxy star formation quenchingUnderstanding how galaxies cease to form stars represents an outstanding challenge for galaxy evolution theories. This process of "star formation quenching" has been related to various causes, including active galactic nuclei activity, the influence of large-scale dynamics, and the environment in which galaxies live. In this paper, we present theColombo, D. et al.
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122020 -
Perturbation theory for modeling galaxy bias: Validation with simulations of the Dark Energy SurveyWe describe perturbation theory (PT) models of galaxy bias for applications to photometric galaxy surveys. We model the galaxy-galaxy and galaxy-matter correlation functions in configuration space and validate against measurements from mock catalogs designed for the Dark Energy Survey (DES). We find that an effective PT model with five galaxy biasPandey, S. et al.
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122020 -
Tracing the evolution of dust-obscured activity using sub-millimetre galaxy populations from STUDIES and AS2UDSWe analyse the physical properties of 121 SNR ≥ 5 sub-millimetre galaxies (SMGs) from the STUDIES 450 μm survey. We model their UV-to-radio spectral energy distributions using MAGPHYS+photo-z and compare the results to similar modelling of 850 μm-selected SMG sample from AS2UDS, to understand the fundamental physical differences between the twoDudzevičiūtė, U. et al.
Advertised on:
102020 -
First Cosmology Results using Supernovae Ia from the Dark Energy Survey: Survey Overview, Performance, and Supernova SpectroscopyWe present details on the observing strategy, data-processing techniques, and spectroscopic targeting algorithms for the first three years of operation for the Dark Energy Survey Supernova Program (DES-SN). This five-year program using the Dark Energy Camera mounted on the 4 m Blanco telescope in Chile was designed to discover and follow supernovaeSmith, M. et al.
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122020 -
A DESGW Search for the Electromagnetic Counterpart to the LIGO/Virgo Gravitational-wave Binary Neutron Star Merger Candidate S190510gWe present the results from a search for the electromagnetic counterpart of the LIGO/Virgo event S190510g using the Dark Energy Camera (DECam). S190510g is a binary neutron star (BNS) merger candidate of moderate significance detected at a distance of 227 ± 92 Mpc and localized within an area of 31 (1166) square degrees at 50% (90%) confidenceGarcia, A. et al.
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112020 -
Observations of [OI]63-=μm line emission in main-sequence galaxies at z ∼ 1.5We present Herschel-PACS spectroscopy of four main-sequence star-forming galaxies at z ∼ 1.5. We detect [OI]63-=μm line emission in BzK-21000 at z = 1.5213, and measure a line luminosity, $L_{\rm [O\, {\small I}]63\, \mu m} = (3.9\pm 0.7)\times 10^9$ -=L ☉. Our PDR modelling of the interstellar medium in BzK-21000 suggests a UV radiation fieldWagg, J. et al.
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92020 -
μ<SUB>⋆</SUB> masses: weak-lensing calibration of the Dark Energy Survey Year 1 redMaPPer clusters using stellar massesWe present the weak-lensing mass calibration of the stellar-mass-based μ ⋆ mass proxy for redMaPPer galaxy clusters in the Dark Energy Survey Year 1. For the first time, we are able to perform a calibration of μ ⋆ at high redshifts, z > 0.33. In a blinded analysis, we use ∼6000 clusters split into 12 subsets spanning the ranges 0.1 ≤ z < 0.65 and μPereira, M. E. S. et al.
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92020 -
CO emission in distant galaxies on and above the main sequenceWe present the detection of multiple carbon monoxide CO line transitions with ALMA in a few tens of infrared-selected galaxies on and above the main sequence at z = 1.1-1.7. We reliably detected the emission of CO (5 - 4), CO (2 - 1), and CO (7 - 6)+[C I]( 3P 2 - 3P 1) in 50, 33, and 13 galaxies, respectively, and we complemented this informationValentino, F. et al.
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92020 -
Dust Reverberation Mapping in Distant Quasars from Optical and Mid-infrared Imaging SurveysThe size of the dust torus in active galactic nuclei (AGNs) and their high-luminosity counterparts, quasars, can be inferred from the time delay between UV/optical accretion disk continuum variability and the response in the mid-infrared (MIR) torus emission. This dust reverberation mapping (RM) technique has been successfully applied to ∼70 z ≲ 0Yang, Qian et al.
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92020 -
Noise from undetected sources in Dark Energy Survey imagesFor ground-based optical imaging with current CCD technology, the Poisson fluctuations in source and sky background photon arrivals dominate the noise budget and are readily estimated. Another component of noise, however, is the signal from the undetected population of stars and galaxies. Using injection of artifical galaxies into images, weEckert, K. et al.
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72020 -
Emergence of an Ultrared, Ultramassive Galaxy Cluster Core at z = 4Recent simulations and observations of massive galaxy cluster evolution predict that the majority of stellar mass buildup happens within cluster members by z = 2, before cluster virialization. Protoclusters rich with dusty, star-forming galaxies (DSFGs) at z > 3 are the favored candidate progenitors for these massive galaxy clusters at z ∼ 0. WeLong, Arianna S. et al.
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82020 -
IRAM 30-m-EMIR redshift search of z = 3─4 lensed dusty starbursts selected from the HerBS sampleUsing the Eight MIxer Receiver (EMIR) instrument on the Institut de RadioAstronomie Millimétrique (IRAM) 30-m telescope, we conducted a spectroscopic redshift search of seven z phot ∼ 4 submillimetre bright galaxies selected from the Herschel Bright Sources sample with fluxes at 500 μm greater than 80 mJy. For four sources, we obtainedBakx, T. J. L. C. et al.
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62020 -
Understanding galaxy formation and evolution through an all-sky submillimetre spectroscopic surveyWe illustrate the extraordinary discovery potential for extragalactic astrophysics of a far-infrared/submillimetre (far-IR/submm) all-sky spectroscopic survey with a 3-m-class space telescope. Spectroscopy provides a three-dimensional view of the Universe and allows us to take full advantage of the sensitivity of present-day instrumentation, closeNegrello, Mattia et al.
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02020 -
COLDz: A High Space Density of Massive Dusty Starburst Galaxies ∼1 Billion Years after the Big BangWe report the detection of CO(J = 2 → 1) emission from three massive dusty starburst galaxies at z > 5 through molecular line scans in the NSF's Karl G. Jansky Very Large Array (VLA) CO Luminosity Density at High Redshift (COLDz) survey. Redshifts for two of the sources, HDF 850.1 (z = 5.183) and AzTEC-3 (z = 5.298), were previously known. WeRiechers, Dominik A. et al.
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62020 -
SCUBA-2 overdensities associated with candidate protoclusters selected from Planck dataWe measure the 850-μm source densities of 46 candidate protoclusters selected from the Planck high-z catalogue (PHz) and the Planck Catalogue of Compact Sources (PCCS) that were followed up with Herschel-SPIRE and SCUBA-2. This paper aims to search for overdensities of 850-μm sources in order to select the fields that are most likely to be genuineCheng, T. et al.
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42020
