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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Consistency of cosmic shear analyses in harmonic and real spaceRecent cosmic shear studies have reported discrepancies of up to 1σ on the parameter ${S_{8}=\sigma _{8}\sqrt{{\Omega _{\rm m}}/0.3}}$ between the analysis of shear power spectra and two-point correlation functions, derived from the same shear catalogues. It is not a priori clear whether the measured discrepancies are consistent with statisticalDoux, C. et al.
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No Evidence for Orbital Clustering in the Extreme Trans-Neptunian ObjectsThe apparent clustering in longitude of perihelion ϖ and ascending node Ω of extreme trans-Neptunian objects (ETNOs) has been attributed to the gravitational effects of an unseen 5-10 Earth-mass planet in the outer solar system. To investigate how selection bias may contribute to this clustering, we consider 14 ETNOs discovered by the Dark EnergyNapier, K. J. et al.
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A titanic interstellar medium ejection from a massive starburst galaxy at redshift 1.4Feedback-driven winds from star formation or active galactic nuclei might be a relevant channel for the abrupt quenching of star formation in massive galaxies. However, both observations and simulations support the idea that these processes are non-conflictingly co-evolving and self-regulating. Furthermore, evidence of disruptive events that arePuglisi, Annagrazia et al.
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The infrared-radio correlation of star-forming galaxies is strongly M<SUB>⋆</SUB>-dependent but nearly redshift-invariant since z ∼ 4Over the past decade, several works have used the ratio between total (rest 8‒1000 μm) infrared and radio (rest 1.4 GHz) luminosity in star-forming galaxies (q IR), often referred to as the infrared-radio correlation (IRRC), to calibrate the radio emission as a star formation rate (SFR) indicator. Previous studies constrained the evolution of q IRDelvecchio, I. et al.
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The Atacama Cosmology Telescope: A Catalog of >4000 Sunyaev–Zel’dovich Galaxy ClustersWe present a catalog of 4195 optically confirmed Sunyaev–Zel’dovich (SZ) selected galaxy clusters detected with signal-to-noise ratio >4 in 13,211 deg 2 of sky surveyed by the Atacama Cosmology Telescope (ACT). Cluster candidates were selected by applying a multifrequency matched filter to 98 and 150 GHz maps constructed from ACT observationsHilton, M. et al.
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Dark energy survey year 1 results: Constraining baryonic physics in the UniverseMeasurements of large-scale structure are interpreted using theoretical predictions for the matter distribution, including potential impacts of baryonic physics. We constrain the feedback strength of baryons jointly with cosmology using weak lensing and galaxy clustering observables (3 × 2pt) of Dark Energy Survey (DES) Year 1 data in combinationHuang, Hung-Jin et al.
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The WaZP galaxy cluster sample of the dark energy survey year 1We present a new (2+1)D galaxy cluster finder based on photometric redshifts called Wavelet Z Photometric (WaZP) applied to DES first year (Y1A1) data. The results are compared to clusters detected by the South Pole Telescope (SPT) survey and the redMaPPer cluster finder, the latter based on the same photometric data. WaZP searches for clusters inAguena, M. et al.
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CO Excitation, Molecular Gas Density, and Interstellar Radiation Field in Local and High-redshift GalaxiesWe study the carbon monoxide (CO) excitation, mean molecular gas density, and interstellar radiation field (ISRF) intensity in a comprehensive sample of 76 galaxies from local to high redshift (z ∼ 0-6), selected based on detections of their CO transitions J = 2 → 1 and 5 → 4 and their optical/infrared/(sub)millimeter spectral energy distributionsLiu, Daizhong et al.
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The interstellar medium of quiescent galaxies and its evolution with timeWe characterise the basic far-IR properties and the gas mass fraction of massive (⟨log(M */M ⊙)⟩ ≈ 11.0) quiescent galaxies (QGs) and explore how these evolve from z = 2.0 to the present day. We use robust, multi-wavelength (mid- to far-IR and sub-millimetre to radio) stacking ensembles of homogeneously selected and mass complete samples of log(M *Magdis, Georgios E. et al.
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Probing the existence of a rich galaxy overdensity at z = 5.2We report the results of a pilot spectroscopic program of a region at z = 5.2 in the GOODS-N field containing an overdensity of galaxies around the well-known submillimetre galaxy (SMG) HDF850.1. We have selected candidate cluster members from the optical 25 medium-band photometric catalogue of the project SHARDS (Survey for High-z Absorption RedCalvi, Rosa et al.
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Close-up view of a luminous star-forming galaxy at z = 2.95Exploiting the sensitivity of the IRAM NOrthern Extended Millimeter Array (NOEMA) and its ability to process large instantaneous bandwidths, we have studied the morphology and other properties of the molecular gas and dust in the star forming galaxy, H-ATLAS J131611.5+281219 (HerBS-89a), at z = 2.95. High angular resolution (0 .″3) images reveal aBerta, S. et al.
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22021 -
Turbulent Gas in Lensed Planck-selected Starbursts at z ∼ 1-3.5Dusty star-forming galaxies at high redshift (1 < z < 3) represent the most intense star-forming regions in the universe. Key aspects to these processes are the gas heating and cooling mechanisms, and although it is well known that these galaxies are gas-rich, little is known about the gas excitation conditions. Only a few detailed radiativeHarrington, Kevin C. et al.
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22021 -
Cosmological constraints from DES Y1 cluster abundances and SPT multiwavelength dataWe perform a joint analysis of the counts of redMaPPer clusters selected from the Dark Energy Survey (DES) year 1 data and multiwavelength follow-up data collected within the 2500 deg 2 South Pole Telescope (SPT) Sunyaev-Zel'dovich (SZ) survey. The SPT follow-up data, calibrating the richness-mass relation of the optically selected redMaPPerCostanzi, M. et al.
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DES Y1 results: Splitting growth and geometry to test Λ CDMWe analyze Dark Energy Survey (DES) data to constrain a cosmological model where a subset of parameters—focusing on Ω m—are split into versions associated with structure growth (e.g., Ω m grow) and expansion history (e.g., Ω m geo). Once the parameters have been specified for the Λ CDM cosmological model, which includes general relativity as aMuir, J. et al.
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A machine learning approach to galaxy properties: joint redshift-stellar mass probability distributions with Random ForestWe demonstrate that highly accurate joint redshift-stellar mass probability distribution functions (PDFs) can be obtained using the Random Forest (RF) machine learning (ML) algorithm, even with few photometric bands available. As an example, we use the Dark Energy Survey (DES), combined with the COSMOS2015 catalogue for redshifts and stellar massesMucesh, S. et al.
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Evolution of galaxy scaling relations in clusters at 0.5 < z < 1.5Aims: We present new gas kinematic observations with the OSIRIS instrument at the GTC for galaxies in the Cl1604 cluster system at z ∼ 0.9. These observations together with a collection of other cluster samples at different epochs analyzed by our group are used to study the evolution of the Tully-Fisher, velocity-size, and specific angular momentumPérez-Martínez, J. M. et al.
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22021 -
Dark Energy Survey Year 3 results: Optimizing the lens sample in a combined galaxy clustering and galaxy-galaxy lensing analysisWe investigate potential gains in cosmological constraints from the combination of galaxy clustering and galaxy-galaxy lensing by optimizing the lens galaxy sample selection using information from Dark Energy Survey (DES) Year 3 data and assuming the DES Year 1 METACALIBRATION sample for the sources. We explore easily reproducible selections basedPorredon, A. et al.
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22021 -
Shadows in the Dark: Low-surface-brightness Galaxies Discovered in the Dark Energy SurveyWe present a catalog of 23,790 extended low-surface-brightness galaxies (LSBGs) identified in $\sim 5000\,{\deg }^{2}$ from the first three years of imaging data from the Dark Energy Survey (DES). Based on a single-component Sérsic model fit, we define extended LSBGs as galaxies with g-band effective radii ${R}_{\mathrm{eff}}(g)\gt 2\buildrel{Tanoglidis, D. et al.
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22021 -
The effect of environment on Type Ia supernovae in the Dark Energy Survey three-year cosmological sampleAnalyses of Type Ia supernovae (SNe Ia) have found puzzling correlations between their standardized luminosities and host galaxy properties: SNe Ia in high-mass, passive hosts appear brighter than those in lower mass, star-forming hosts. We examine the host galaxies of SNe Ia in the Dark Energy Survey 3-yr spectroscopically confirmed cosmologicalKelsey, L. et al.
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Dark Energy Survey Year 1 results: the lensing imprint of cosmic voids on the cosmic microwave backgroundCosmic voids gravitationally lens the cosmic microwave background (CMB) radiation, resulting in a distinct imprint on degree scales. We use the simulated CMB lensing convergence map from the Marenostrum Institut de Ciencias de l'Espai (MICE) N-body simulation to calibrate our detection strategy for a given void definition and galaxy tracer densityVielzeuf, P. et al.
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