Dominik A. Riechers
A5026859057- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Astronomical Observations and Instrumentation
- Adaptive optics and wavefront sensing
- Superconducting and THz Device Technology
- Spectroscopy and Laser Applications
- Cosmology and Gravitation Theories
- Scientific Research and Discoveries
- Calibration and Measurement Techniques
- Atmospheric Ozone and Climate
- Phase Equilibria and Thermodynamics
- Dark Matter and Cosmic Phenomena
- Geophysics and Gravity Measurements
- Solar and Space Plasma Dynamics
- CCD and CMOS Imaging Sensors
- Advanced Thermodynamic Systems and Engines
- Distributed and Parallel Computing Systems
- Plant Water Relations and Carbon Dynamics
- Optical Coatings and Gratings
Max Planck Institute for Astronomy
2006-2024
Cornell University
2014-2024
University of Cologne
2021-2024
Max Planck Institute for Astrophysics
2024
University of British Columbia
2023
Cologne Business School
2022
Max Planck Institute for Radio Astronomy
2004-2021
National Institute for Astrophysics
2021
Diego Portales University
2021
New Mexico Institute of Mining and Technology
2021
We present evidence for very high gas fractions and extended molecular reservoirs in normal, near-infrared selected (BzK) galaxies at z~1.5, based on multi-configuration CO[2-1] observations obtained the IRAM PdBI. Six of six observed were securely detected. High resolution resolve CO emission four them, implying sizes order 6-11 kpc suggesting presence rotation. The UV morphologies are consistent with clumpy, unstable disks, sizes. star formation efficiencies homogeneously low similar to...
We present evidence that bona fide disks and starburst systems occupy distinct regions in the gas mass versus star formation rate (SFR) plane, both for integrated quantities respective surface densities. This result is based on carbon monoxide (CO) observations of galaxy populations at low high redshifts, current consensus CO luminosity to conversion factors. The data suggest existence two different SF regimes: a long-lasting mode more rapid starbursts, latter probably occurring during major...
Modern (sub-)millimeter interferometers enable the measurement of cool gas and dust emission high-redshift galaxies (z>5). However, at these redshifts cosmic microwave background (CMB) temperature is higher, approaching, even exceeding, cold molecular observed in local Universe. In this paper, we discuss impact warmer CMB on observations galaxies. The affects continuum line (e.g. carbon monoxide, CO) two ways: (i) it provides an additional source (both gas) heating; (ii) a non-negligible...
ABSTRACT We make use of deep 1.2 mm continuum observations (12.7 μ Jy beam −1 rms) a 1 arcmin 2 region in the Hubble Ultra Deep Field to probe dust-enshrouded star formation from 330 Lyman-break galaxies spanning redshift range z = 2–10 (to ∼2–3 M ⊙ yr at σ over entire range). Given depth and area ASPECS, we would expect tentatively detect 35 galaxies, extrapolating Meurer ∼ 0 IRX– β relation ≥ (assuming dust temperature T d K). However, only six tentative detections are found ≳ with just...
Abstract The Cosmic Evolution Survey (COSMOS) has become a cornerstone of extragalactic astronomy. Since the last public catalog in 2015, wealth new imaging and spectroscopic data have been collected COSMOS field. This paper describes collection, processing, analysis these to produce reference photometric redshift catalog. Source detection multiwavelength photometry are performed for 1.7 million sources across 2 deg field, ∼966,000 which measured with all available broadband using both...
We present a survey of the [CII] 158 $\mu$m line and underlying far-infrared (FIR) dust continuum emission in sample 27 z>6 quasars using Atacama Large Millimeter Array (ALMA) at ~1" resolution. The was significantly detected (at >5-sigma) 23 sources (85%). find typical luminosities $L_{\rm [CII]}=10^{9-10}$ L$_\odot$, an average width ~385 km/s. [CII]-to-far-infrared luminosity ratio ([CII]/FIR) our span one order magnitude, highlighting variety conditions star-forming medium. Four quasar...
Three billion years after the big bang (at redshift z=2), half of most massive galaxies were already old, quiescent systems with little to no residual star formation and extremely compact stellar mass densities at least an order magnitude larger than in low ellipticals, their descendants. Little is known about how they formed, but evolved, dense populations suggest within intense, starbursts 1-2 Gyr earlier 3<z<6). Simulations show that gas-rich major mergers can give rise such which produce...
We present ALMA observations of the [C II] 158 micron fine structure line and dust continuum emission from host galaxies five redshift 6 quasars. also report complementary 250 GHz CO (6-5) z=6.00 quasar SDSS J231038.88+185519.7. The were carried out in extended array at 0.7" resolution. have detected all objects. derived luminosities are 1.6x10^{9} to 8.8x10^{9} Lsun II]-to-FIR luminosity ratios 3.0-5.6x10^{-4}, which is comparable values found other high-redshift quasar-starburst systems...
The ALPINE-ALMA large program targets the [CII] 158 $\mu$m line and far-infrared continuum in 118 spectroscopically confirmed star-forming galaxies between z=4.4 z=5.9. It represents first statistical sample built this redshift range. We present details of data processing construction catalogs. detected 23 our continuum. To derive accurate infrared luminosities obscured star formation rates, we measured conversion factor from ALMA rest-frame dust luminosity to total (L$_{\rm IR}$) after...
The ALMA-ALPINE [CII] survey is aimed at characterizing the properties of a sample normal star-forming galaxies (SFGs). ALMA Large Program to INvestigate (ALPINE) features 118 observed in [CII]-158$μ$m line and far infrared (FIR) continuum emission during period rapid mass assembly, right after end HI reionization, redshifts 45). Based on visual inspection data cubes together with large wealth ancillary data, we find surprisingly wide range galaxy types, including 40% that are mergers, 20%...
We report the identification of an extreme proto-cluster galaxies in early Universe whose core (nicknamed Distant Red Core, DRC) is formed by at least ten dusty star-forming (DSFGs), confirmed to lie $z_{\rm spec} = 4.002$ via detection [CI](1-0), $^{12}$CO(6-5), $^{12}$CO(4-3), $^{12}$CO(2-1) and ${\rm H_2O} (2_{11} - 2_{02})$ emission lines, detected using ALMA ATCA. The spectroscopically-confirmed components are distributed over a 260\, kpc \times 310\, kpc}$ region have collective...
We present the detailed characterisation of a sample 56 sources serendipitously detected in ALMA band 7, as part Large Program to INvestigate CII at Early Times (ALPINE) COSMOS and ECDFS. These have been used derive total infrared luminosity function (LF) estimate cosmic star formation rate density (SFRD) up z=6. looked for counterparts all available multi-wavelength photometric redshift catalogues, deeper near- mid-IR source lists maps, identify optically dark with no matches public...
Abstract We present the ancillary data and basic physical measurements for galaxies in ALMA Large Program to Investigate C + at Early Times (ALPINE) survey—the first large multiwavelength survey that aims characterizing gas dust properties of 118 main-sequence redshifts 4.4 < z 5.9 via measurement [ <?CDATA ${\rm{C}}\,{\rm{II}}$?> ] emission $158\,\mu {\rm{m}}$?> (64% >3.5 σ ) surrounding far-infrared continuum conjunction with a wealth optical near-infrared data. outline detail...
Abstract The Reionization Era Bright Emission Line Survey (REBELS) is a cycle-7 ALMA Large Program (LP) that identifying and performing first characterization of many the most luminous star-forming galaxies known in z > 6.5 universe. REBELS providing this probe by systematically scanning 40 brightest UV-selected identified over 7 deg 2 area for bright [C ii ] 158 μ m [O iii 88 lines dust-continuum emission. Selection targets was done combining our own other photometric selections, each...
ALMA observations have revealed the presence of dust in first generations galaxies Universe. However, temperature $T_d$ remains mostly unconstrained due to few available FIR continuum data at redshift $z>5$. This introduces large uncertainties several properties high-$z$ galaxies, namely their masses, infrared luminosities, and obscured fraction star formation. Using a new method based on simultaneous [CII] 158$\mu$m line underlying measurements, we derive $T_ d$ detected $z\approx 7$ Large...
ABSTRACT We include a fully coupled treatment of metal and dust enrichment into the Delphi semi-analytic model galaxy formation to explain content 13 Lyman break galaxies (LBGs) detected by Atacama Large millimetre Array (ALMA) REBELS Program at z ≃ 7. find that mass, Md, is regulated combination Type II supernova production, astration, shock destruction, ejection in outflows; grain growth (with standard time-scale τ0 = 30 Myr) plays negligible role. The predicts dust-to-stellar mass ratio...
We report 18 dust continuum detections ($\geq 3.3\sigma$) at $\sim88{\rm \mu m}$ and $158{\rm out of 49 ultraviolet(UV)-bright galaxies ($M_{\rm UV} < -21.3$ mag) $z>6.5$, observed by the Cycle-7 ALMA Large Program, REBELS its pilot programs. This has more than tripled number known $z>6.5$. Out these detections, 12 are reported for first time as part REBELS. In addition, 15 detected also show a [CII]$_{\rm 158{\rm m}}$ emission line, providing us with accurate redshifts. anticipate line from...
We report our new observations of redshifted carbon monoxide emission from six z~6 quasars, using the PdBI. CO (6-5) or (5-4) line was detected in all sources. Together with two other previous detections, these provide unique constraints on molecular gas properties quasar systems close to end cosmic reionization. Complementary results are also presented for low-J lines observed at GBT and VLA, dust continuum five sources SHARC-II bolometer camera CSO. then present a study combined sample...