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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The [CII] 158 μm emission line as a gas mass tracer in high redshift quiescent galaxiesA great deal of effort has been made in recent years to probe the gas fraction evolution of massive quiescent galaxies (QGs); however, a clear picture has not yet been established. Recent spectroscopic confirmations at z > 3 offer the chance to measure the residual gas reservoirs of massive galaxies a few hundred Myr after their death and to studyD'Eugenio, C. et al.
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102023 -
z-GAL: A NOEMA spectroscopic redshift survey of bright Herschel galaxies. II. Dust propertiesWe present the dust properties of 125 bright Herschel galaxies selected from the z-GAL NOEMA spectroscopic redshift survey. All the galaxies have precise spectroscopic redshifts in the range 1.3 < z < 5.4. The large instantaneous bandwidth of NOEMA provides an exquisite sampling of the underlying dust continuum emission at 2 and 3 mm in theIsmail, D. et al.
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102023 -
z-GAL: A NOEMA spectroscopic redshift survey of bright Herschel galaxies. I. OverviewUsing the IRAM NOrthern Extended Millimetre Array (NOEMA), we conducted a Large Programme (z-GAL) to measure redshifts for 126 bright galaxies detected in the Herschel Astrophysical Large Area Survey (H-ATLAS), the HerMES Large Mode Survey (HeLMS), and the Herschel Stripe 82 (HerS) Survey. We report reliable spectroscopic redshifts for a total ofCox, P. et al.
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102023 -
z-GAL: A NOEMA spectroscopic redshift survey of bright Herschel galaxies. III. Physical propertiesThe z-GAL survey observed 137 bright Herschel-selected targets with the IRAM Northern Extended Millimeter Array, with the aim to measure their redshift and study their properties. Several of them have been resolved into multiple sources. Consequently, robust spectroscopic redshifts have been measured for 165 individual galaxies in the range 0.8 < zBerta, S. et al.
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102023 -
Bright submillimeter galaxies do trace galaxy protoclustersThere is controversy in the literature regarding whether distant, massive, and dusty starbursts selected at (sub)millimeter wavelengths can trace galaxy overdensities. We thus performed the first systematic search for distant protoclusters around a homogeneously selected sample of 12 spectroscopically confirmed submillimeter galaxies (SMGs) at z ∼Calvi, Rosa et al.
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102023 -
The Young and the Wild: What Happens to Protoclusters Forming at Redshift z ≈ 4?Using one of the largest volumes of the hydrodynamical cosmological simulation suit Magneticum, we study the evolution of protoclusters identified at redshift ≈ 4, with properties similar to the well-observed protocluster SPT2349-56. We identify 42 protoclusters in the simulation as massive and equally rich in substructures as observed, confirmingRemus, Rhea-Silvia et al.
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62023 -
What boost galaxy mergers in two massive galaxy protoclusters at z = 2.24?Characterizing the structural properties of galaxies in high-redshift protoclusters is key to our understanding of the environmental effects on galaxy evolution in the early stages of galaxy and structure formation. In this study, we assess the structural properties of 85 and 87 Hα emission-line candidates (HAEs) in the densest regions of twoLiu, Shuang et al.
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82023 -
The bright extragalactic ALMA redshift survey (BEARS) - II. Millimetre photometry of gravitational lens candidatesWe present 101- and 151-GHz ALMA continuum images for 85 fields selected from Herschel observations that have 500-μm flux densities >80 mJy and 250-500-μm colours consistent with z > 2, most of which are expected to be gravitationally lensed or hyperluminous infrared galaxies. Approximately half of the Herschel 500-μm sources were resolved intoBendo, G. J. et al.
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62023 -
Bright extragalactic ALMA redshift survey (BEARS) III: detailed study of emission lines from 71 Herschel targetsWe analyse the molecular and atomic emission lines of 71 bright Herschel-selected galaxies between redshifts 1.4 and 4.6 detected by the Atacama Large Millimeter/submillimeter Array. These lines include a total of 156 CO, [C I], and H 2O emission lines. For 46 galaxies, we detect two transitions of CO lines, and for these galaxies we find gasHagimoto, M. et al.
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62023 -
Forming intracluster gas in a galaxy protocluster at a redshift of 2.16Galaxy clusters are the most massive gravitationally bound structures in the Universe, comprising thousands of galaxies and pervaded by a diffuse, hot intracluster medium (ICM) that dominates the baryonic content of these systems. The formation and evolution of the ICM across cosmic time 1 is thought to be driven by the continuous accretion ofDi Mascolo, Luca et al.
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32023 -
VLA Legacy Survey of Molecular Gas in Massive Star-forming Galaxies at High RedshiftWe present the initial results of an ongoing survey with the Karl G. Jansky Very Large Array targeting the CO(J = 1-0) transition in a sample of 30 submillimeter-selected, dusty star-forming galaxies (SFGs) at z = 2-5 with existing mid-J CO detections from the Atacama Large Millimeter/submillimeter Array and NOrthern Extended Millimeter Array, ofFrias Castillo, Marta et al.
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32023 -
VLA Legacy Survey of Molecular Gas in Massive Star-forming Galaxies at High RedshiftWe present the initial results of an ongoing survey with the Karl G. Jansky Very Large Array targeting the CO(J = 1-0) transition in a sample of 30 submillimeter-selected, dusty star-forming galaxies (SFGs) at z = 2-5 with existing mid-J CO detections from the Atacama Large Millimeter/submillimeter Array and NOrthern Extended Millimeter Array, ofCastillo, Marta Frias et al.
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32023 -
The SCUBA-2 Large eXtragalactic Survey: 850μm map, catalogue and the bright-end number counts of the XMM-LSS fieldWe present $850\, \mu {\rm m}$ imaging of the XMM-LSS field observed for 170 h as part of the James Clerk Maxwell Telescope SCUBA-2 Large eXtragalactic Survey (S2LXS). S2LXS XMM-LSS maps an area of $9\, {\rm deg}^2$, reaching a moderate depth of $1\sigma \simeq 4\, {\rm mJy\, beam^{-1}}$. This is the largest contiguous area of extragalactic skyGarratt, T. K. et al.
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42023 -
Resolved CO(1-0) Emission and Gas Properties in Luminous Dusty Star-forming Galaxies at z = 2-4We present the results of a survey of CO(1-0) emission in 14 infrared luminous dusty star-forming galaxies (DSFGs) at 2 < z < 4 with the NSF's Karl G. Jansky Very Large Array. All sources are detected in 12CO(1-0), with an angular resolution of ~1″. Seven sources show extended and complex structure. We measure CO luminosities of $(\mu ){L}_{\mathrmStanley, F. et al.
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32023 -
Massive quiescent galaxies at z 3: A comparison of selection, stellar population, and structural properties with simulation predictionsWe study stellar population and structural properties of massive log (M ⋆/M ⊙) > 11 galaxies at z ≈ 2.7 in the Magneticum and IllustrisTNG hydrodynamical simulations and GAEA semi-analytic model. We find stellar mass functions broadly consistent with observations, with no scarcity of massive, quiescent galaxies at z ≈ 2.7, but with a higherLustig, Peter et al.
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22023 -
Signs of environmental effects on star-forming galaxies in the Spiderweb protocluster at z = 2.16We use multi-object near-infrared spectroscopy with VLT/KMOS to investigate the role of the environment in the evolution of the ionized gas properties of narrow-band-selected H α emitters (HAEs) in the Spiderweb protocluster at z = 2.16. Based on rest-frame optical emission lines, H α and [N II]λ6584, we confirm the cluster membership of 39 of ourPérez-Martínez, J. M. et al.
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12023 -
The uncertain interstellar medium of high-redshift quiescent galaxies: Impact of methodologyHow 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-ALMAGobat, R. et al.
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122022 -
The GLEAMing of the first supermassive black holes: II. A new sample of high-redshift radio galaxy candidatesWhile unobscured and radio-quiet active galactic nuclei are regularly being found at redshifts $z > 6$ , their obscured and radio-loud counterparts remain elusive. We build upon our successful pilot study, presenting a new sample of low-frequency-selected candidate high-redshift radio galaxies (HzRGs) over a sky area 20 times larger. We haveBroderick, J. W. et al.
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112022 -
The 700 ks Chandra Spiderweb Field. II. Evidence for inverse-Compton and thermal diffuse emission in the Spiderweb galaxyAims: 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 contaminationTozzi, P. et al.
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112022 -
High-z Sudoku: a diagnostic tool for identifying robust (sub)mm redshiftsWe present methods to (i) graphically identify robust redshifts using emission lines in the (sub)mm regime, (ii) evaluate the capabilities of different (sub)mm practices for measuring spectroscopic redshifts, and (iii) optimize future (sub)mm observations towards increasing the fraction of robust redshifts. Using this publicly available code (httpsBakx, Tom J. L. C. et al.
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