Año de inicio
2015
Unidad organizativa
Subvenciones relacionadas:
General
Descripción
Dos cuestiones fundamentales en la Astrofísica son la conversión de gas molecuar en estrellas y cómo este proceso físico depende del entorno en todas las escalas, desde sistemas planetarios, cúmulos estelares, galaxias hasta cúmulos de galaxias. El objectivo principal de este proyecto es el de estudiar la formación y evolución de galaxias a partir de la materia interstellar. Por ello, estudiaremos el gas molecuar frío, el combustible de la formación estelar y el polvo, producto residual del proceso de formación, en galaxias a través del tiempo cósmico. Los estudios están basados, sobre todo, en observaciones en el infrarrojo lejano y en el radio. Nos centraremos en observaciones con interferómetros de radio como son NOEMA, ALMA, ATCA, SMA y VLA. Se preveen estrechas colaboraciones con otros proyectos del IAC, sobre todo para observaciones de galaxias con telescopios de radio. El grupo de trabajo caracterizará las propiedades de la formación estelar de galaxias masivas en el universo lejano a través del tiempo cósmico. Esto nos dará la oportunidad de estudiar la secuencia de formación de galaxias con brote estelar. Además, este grupo de trabajo investigará fuentes selecionadas desde cúmulos de galaxias y del campo para explorar la evolución de galaxias en funcion del entorno. Además, realizaremos estudios complementarios de galaxias locales (seleccionadas desde CALIFA y WEAVE-APERTIF) que servirán de referencia para investigaciones futuras de galaxias a alto redshift.
Miembros
Investigador principal
Helmut
Dannerbauer
Personal del proyecto
Colaboradores
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
Resultados
- Observaciones de follow-up de una galaxia amplificada con brote estelar a z=2.04 con el radio interferómetro IRAM NOEMA descubrío propiedades del gas molecular extraordinaras y revelo la emision más alta en gas molecuar jamas visto en el universo distante; Dannerbauer et al. 2019, AJ, in prensa (astro-ph/1812.03845).
- Contribuciones con varios articulos de co-autor (parte de colaboraciones internacionales) a la investigacion de cúmulos de galaxias en formacion en el universo lejano y sus miembros via estudios de multi-longitud de ondas.
- Otorgada ayuda externa via el plan naciónal de MINECO para 2018 y 2019 incluyendo fondos para contrarar un postdoc por dos años (AYA2017-84061-P: ´De las primeras sobre-densidades a los proto-cumulos ycúmulos: el papel del entorno´, 141.570 Euro, IP1: H. Dannerbauer, IP2: J. M. Rodríguez-Espinosa).
- Concedido tiempo de observaciones para continuar y finalizar el ATCA programa larga 'COALAS: CO ATCA Legacy Archive of Star-Forming Galaxies' (IP: Helmut Dannerbauer), en total 640 horas (~500.000 Euro). Concedido el IRAM NOEMA programa larga ‘A Comprehensive NOEMA Redshift Survey of the Brightest Herschel Galaxies’ (CoIP: Dannerbauer) of 191 hrs. (~770.000 Euro).
- Organización del mini-symposium 'Build-Up of Galaxy Clusters' durante la IAU XXX Assamblea General en Viena en Agosto de 2018 y del splinter "Collaborative GTC-LMT projects" durante el GTC congreso en Valencia en Diciembre de 2018.
Actividad científica
Publicaciones relacionadas
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The Typical Massive Quiescent Galaxy at z ∼ 3 is a Post-starburstWe have obtained spectroscopic confirmation with Hubble Space Telescope WFC3/G141 of a first sizeable sample of nine quiescent galaxies at 2.4 < z < 3.3. Their average near-UV/optical rest-frame spectrum is characterized by low attenuation (A V ∼ 0.6 mag) and a strong Balmer break, larger than the 4000 Å break, corresponding to a fairly young ageD'Eugenio, C. et al.
Fecha de publicación:
32020 -
Extended Hα over compact far-infrared continuum in dusty submillimeter galaxies. Insights into dust distributions and star-formation rates at z ∼ 2By using data from the Atacama Large Millimeter/submillimeter Array and near-infrared (NIR) integral field spectrographs, including both Spectrograph for INtegral Field Observations in the Near Infrared and K-band Multi Object Spectrograph on the Very Large Telescope, we investigate the two-dimensional distributions of Hα and rest-frame farChen, Chian-Chou et al.
Fecha de publicación:
32020 -
NOEMA redshift measurements of bright Herschel galaxiesUsing the IRAM NOrthern Extended Millimeter Array (NOEMA), we conducted a program to measure redshifts for 13 bright galaxies detected in the Herschel Astrophysical Large Area Survey with S 500 μm ≥ 80 mJy. We report reliable spectroscopic redshifts for 12 individual sources, which are derived from scans of the 3 and 2 mm bands, covering up to 31Neri, R. et al.
Fecha de publicación:
32020 -
The Properties of the Interstellar Medium of Galaxies across Time as Traced by the Neutral Atomic Carbon [C i]We report Atacama Large Millimeter Array observations of the neutral atomic carbon transitions [C i] and multiple CO lines in a sample of ̃30 main-sequence galaxies at $z\sim 1$ , including novel information on [C i] ${(}^{3}{P}_{2}{\mbox{--}}^{3}{P}_{1})$ and CO $(7\mbox{--}6)$ for 7 of such normal objects. We complement our observations with aValentino, Francesco et al.
Fecha de publicación:
22020 -
SCUBA-2 Ultra Deep Imaging EAO Survey (Studies). III. Multiwavelength Properties, Luminosity Functions, and Preliminary Source Catalog of 450 μm Selected GalaxiesWe construct a SCUBA-2 450 μm map in the COSMOS field that covers an area of 300 arcmin 2 and reaches a 1σ noise level of 0.65 mJy in the deepest region. We extract 256 sources detected at 450 μm with signal-to-noise ratios >4.0 and analyze the physical properties of their multiwavelength counterparts. We find that most of the sources are at z ≲ 3Lim, Chen-Fatt et al.
Fecha de publicación:
22020 -
On the Gas Content, Star Formation Efficiency, and Environmental Quenching of Massive Galaxies in Protoclusters at z ≈ 2.0─2.5We present ALMA Band 6 (ν = 233 GHz, λ = 1.3 mm) continuum observations toward 68 “normal” star-forming galaxies within two Coma-like progenitor structures at z = 2.10 and 2.47, from which ISM masses are derived, providing the largest census of molecular gas mass in overdense environments at these redshifts. Our sample comprises galaxies with aZavala, J. A. et al.
Fecha de publicación:
122019 -
Merger induced clump formation in distant infrared luminous starburst galaxiesWhile the formation of stellar clumps in distant galaxies is usually attributed to gravitational violent disk instabilities, we show here that major mergers also represent a competitive mechanism to form bright clumps. Using ̃0.1″ resolution ACS F814W images in the entire COSMOS field, we measured the fraction of clumpy emission in 109 mainCalabrò, Antonello et al.
Fecha de publicación:
122019 -
A SCUBA-2 selected Herschel-SPIRE dropout and the nature of this populationDusty star-forming galaxies (DSFGs) detected at z > 4 provide important examples of the first generations of massive galaxies. However, few examples with spectroscopic confirmation are currently known, with Hershel struggling to detect significant numbers of z > 6 DSFGs. NGP6_D1 is a bright 850 μm source (12.3 ± 2.5 mJy) with no counterparts atGreenslade, J. et al.
Fecha de publicación:
122019 -
Discovery of Four Apparently Cold Dusty Galaxies at z = 3.62─5.85 in the COSMOS Field: Direct Evidence of Cosmic Microwave Background Impact on High-redshift Galaxy ObservablesWe report Atacama Large Millimeter Array (ALMA) observations of four high-redshift dusty star-forming galaxy candidates selected from far-infrared (FIR)/submillimeter observations in the COSMOS field. We securely detect all galaxies in the continuum and spectroscopically confirm them at z = 3.62─5.85 using ALMA 3 mm line scans, detecting multipleJin, S. et al.
Fecha de publicación:
122019 -
SCUBA-2 observations of candidate starbursting protoclusters selected by Planck and Herschel-SPIREWe present SCUBA-2 850 μm observations of 13 candidate starbursting protoclusters selected using Planck and Herschel data. The cumulative number counts of the 850 μm sources in 9 of 13 of these candidate protoclusters show significant overdensities compared to the field, with the probability <10 -2 assuming the sources are randomly distributed inCheng, T. et al.
Fecha de publicación:
122019 -
The Atacama Large Aperture Submillimeter Telescope (AtLAST)Overview of the science cases for, and technologies required for a new single dish sub-mm telescope. AtLAST is envisioned as a 50m diameter single dish with a 1deg field of view that will be able to map the large scale structures of the Universe inaccessible to ALMA with mapping speeds 1000s of times faster than current or planned facilities.Klaassen, Pamela et al.
Fecha de publicación:
92019 -
The nature of faint radio galaxies at high redshiftsWe present spectra and near-infrared images of a sample of faint radio sources initially selected as promising high-redshift radio galaxy (HzRG) candidates. We have determined redshifts for a total of 13 radio galaxies with redshifts ranging from 0.52 ≤ z ≤ 5.72. Our sample probes radio luminosities that are almost an order of magnitude fainterSaxena, A. et al.
Fecha de publicación:
112019 -
MAGPHYS+photo-z: Constraining the Physical Properties of Galaxies with Unknown RedshiftsWe present an enhanced version of the multiwavelength spectral modeling code MAGPHYS that allows the estimation of galaxy photometric redshift and physical properties (e.g., stellar mass, star formation rate, dust attenuation) simultaneously, together with robust characterization of their uncertainties. The self-consistent modeling over ultravioletBattisti, A. J. et al.
Fecha de publicación:
92019 -
Neutral carbon and highly excited CO in a massive star-forming main sequence galaxy at z = 2.2We used the Plateau De Bure Interferometer to observe multiple CO and neutral carbon transitions in a z = 2.2 main sequence disk galaxy, BX610. Our observation of CO(7-6), CO(4-3), and both far-infrared (FIR) [CI] lines complements previous observations of Hα and low-J CO, and reveals a galaxy that is vigorously forming stars with UV fields (LogBrisbin, Drew et al.
Fecha de publicación:
82019 -
The Dust and Molecular Gas in the Brightest Cluster Galaxy in MACS 1931.8-2635We present new Atacama Large Millimeter Array observations of the molecular gas and far-infrared continuum around the brightest cluster galaxy (BCG) in the cool-core cluster MACS 1931.8-2635. Our observations reveal (1.9 ± 0.3) × 1010 M ⊙ of molecular gas, on par with the largest known reservoirs of cold gas in a cluster core. We detect CO(1‑0), COFogarty, Kevin et al.
Fecha de publicación:
72019 -
Ultra-bright CO and [{\rm{C}}\,{\rm{I}}] Emission in a Lensed z = 2.04 Submillimeter Galaxy with Extreme Molecular Gas PropertiesWe report the very bright detection of cold molecular gas with the IRAM NOEMA interferometer of the strongly lensed source WISE J132934.18+224327.3 at z = 2.04, the so-called Cosmic Eyebrow. This source has a similar spectral energy distribution from optical-mid/IR to submillimeter/radio but significantly higher fluxes than the well-known lensedDannerbauer, H. et al.
Fecha de publicación:
72019 -
The Main Sequence at z ∼ 1.3 Contains a Sizable Fraction of Galaxies with Compact Star Formation Sizes: A New Population of Early Post-starbursts?Atacama Large Millimeter/submillimeter Array (ALMA) measurements for 93 Herschel-selected galaxies at 1.1 ≤ z ≤ 1.7 in COSMOS reveal a sizable (>29%) population with compact star formation (SF) sizes, lying on average >×3.6 below the optical stellar mass (M ⋆)–size relation of disks. This sample widely spans the star-forming main sequence (MS)Puglisi, A. et al.
Fecha de publicación:
62019 -
ALMA Reveals Potential Evidence for Spiral Arms, Bars, and Rings in High-redshift Submillimeter GalaxiesWe present subkiloparsec-scale mapping of the 870 μm ALMA continuum emission in six luminous (L IR ∼ 5 × 1012 L ⊙) submillimeter galaxies (SMGs) from the ALESS survey of the Extended Chandra Deep Field South. Our high-fidelity 0.″07-resolution imaging (∼500 pc) reveals robust evidence for structures with deconvolved sizes of ≲0.5–1 kpc embeddedHodge, J. A. et al.
Fecha de publicación:
52019 -
The new 4-m robotic telescopeWe present a project to build a 4-m-diameter telescope (New Robotic Telescope [NRT]) with fully robotic operation. The telescope will be sited at the Observatory of Roque de los Muchachos in the island of La Palma (Spain). When it enters into operation in 5 years' time, it will be likely the largest robotic telescope in the world. This, inGutiérrez, C. M. et al.
Fecha de publicación:
12019 -
High Gas Fraction in a CO-detected Main-sequence Galaxy at z > 3We report NOrthern Extended Millimetre Array (NOEMA) observations of warm molecular gas traced by CO(5 ‑ 4) in a z∼ 3.2 gas-rich main-sequence (MS) galaxy, initially serendipitously detected in CO(3 ‑ 2) emission in “blind” deep NOEMA observations. Our target shows a gas excitation consistent with that seen in z∼ 1.5 MS galaxies ({L}CO(5-4)}{\primeGowardhan, A. et al.
Fecha de publicación:
42019
