K. M. Rotermund
A5069805846- Galaxies: Formation, Evolution, Phenomena
- Radio Astronomy Observations and Technology
- Astronomy and Astrophysical Research
- Superconducting and THz Device Technology
- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Physics of Superconductivity and Magnetism
- Scientific Research and Discoveries
- Dark Matter and Cosmic Phenomena
- Calibration and Measurement Techniques
- Atmospheric chemistry and aerosols
- Spectroscopy and Laser Applications
- Atmospheric and Environmental Gas Dynamics
- Adaptive optics and wavefront sensing
- Planetary Science and Exploration
- Precipitation Measurement and Analysis
- Atmospheric aerosols and clouds
- Soil Moisture and Remote Sensing
- Computational Physics and Python Applications
- Neutrino Physics Research
- CCD and CMOS Imaging Sensors
Lawrence Berkeley National Laboratory
2022-2025
Dalhousie University
2014-2023
Cardiff University
2018
University of California, Berkeley
2018
University of California, San Diego
2016
We present a catalogue of nearly 3,000 submillimetre sources detected at 850um over ~5 square degrees surveyed as part the James Clerk Maxwell Telescope (JCMT) SCUBA-2 Cosmology Legacy Survey (S2CLS). This is largest survey its kind 850um, probing meaningful cosmic volume peak star formation activity and increasing sample size galaxies selected by an order magnitude. describe wide component S2CLS, which covers key extragalactic fields: UKIDSS-UDS, COSMOS, Akari-NEP, Extended Groth Strip,...
The South Pole Telescope has discovered one hundred gravitationally lensed, high-redshift, dusty, star-forming galaxies (DSFGs). We present 0.5" resolution 870um Atacama Large Millimeter/submillimeter Array imaging of a sample 47 DSFGs spanning z=1.9-5.7, and construct gravitational lens models these sources. Our visibility-based modeling incorporates several sources residual interferometric calibration uncertainty, allowing us to properly account for noise in the observations. At least 70%...
We use the Atacama Large Millimeter/submillimeter Array (ALMA) in Cycle 1 to determine spectroscopic redshifts of high-redshift dusty star-forming galaxies (DSFGs) selected by their 1.4mm continuum emission South Pole Telescope (SPT) survey. present ALMA 3mm spectral scans between 84-114GHz for 15 and targeted 1mm observations an additional eight sources. Our yield 30 new line detections from CO, [CI] , [NII] H_2O NH_3. further APEX [CII] CO mid-J seven sources which only a single was...
We report the discovery and constrain physical conditions of interstellar medium highest-redshift millimeter-selected dusty star-forming galaxy (DSFG) to date, SPT-S J031132-5823.4 (hereafter SPT0311-58), at $z=6.900 +/- 0.002$. SPT0311-58 was discovered via its 1.4mm thermal dust continuum emission in South Pole Telescope (SPT)-SZ survey. The spectroscopic redshift determined through an ALMA 3mm frequency scan that detected CO(6-5), CO(7-6) [CI](2-1), subsequently confirmed by detections...
We present the average rest-frame spectrum of high-redshift dusty, star-forming galaxies from 250-770GHz. This was constructed by stacking ALMA 3mm spectra 22 such sources discovered South Pole Telescope and spanning z=2.0-5.7. In addition to multiple bright spectral features 12CO, [CI], H2O, we also detect several faint transitions 13CO, HCN, HNC, HCO+, CN, use observed line strengths characterize typical properties interstellar medium these starburst galaxies. find that 13CO brightness in...
We constrain anisotropic cosmic birefringence using four-point correlations of even-parity $E$-mode and odd-parity $B$-mode polarization in the microwave background measurements made by POLARization Background Radiation (POLARBEAR) experiment its first season observations. find that signal from any parity-violating processes is consistent with zero. The Faraday rotation can be compared equivalent quantity generated primordial magnetic fields if they existed. POLARBEAR nondetection translates...
A new technique, first performed using the South Pole Telescope, that allows gravitational deflections of cosmic microwave background to be measured from photon polarization, gets further support measurements by POLARBEAR collaboration.
Abstract We present a detailed overview of the science goals and predictions for Prime-Cam direct-detection camera–spectrometer being constructed by CCAT-prime collaboration dedicated use on Fred Young Submillimeter Telescope (FYST). The FYST is wide-field, 6 m aperture submillimeter telescope built (first light in late 2023) an international consortium institutions led Cornell University sited at more than 5600 Cerro Chajnantor northern Chile. one two instruments planned will provide...
Abstract We have observed the z = 4.3 protocluster SPT2349−56 with Australia Telescope Compact Array (ATCA) aim of detecting radio-loud active galactic nuclei (AGNs) among ∼30 submillimeter (submm) galaxies (SMGs) identified in structure. detect central complex submm sources at 2.2 GHz a luminosity L (4.42 ± 0.56) × 10 25 W Hz −1 . MeerKAT and Australian Square Kilometre Pathfinder also source 816 MHz 888 MHz, respectively, constraining radio spectral index to α −1.45 0.16, implying 1.4,rest...
We present an extensive ALMA spectroscopic follow-up programme of the $z\,{=}\,4.3$ structure SPT2349$-$56, one most actively star-forming proto-cluster cores known, to identify additional members using their [C{\sc ii}] 158\,$\mu$m and \mbox{CO(4--3)} lines. In addition robustly detecting 14 previously published galaxies in this structure, we a further 15 associated at $z\,{=}\,4.3$, resolving 55$\,{\pm}\,$5\,per cent 870-$\mu$m flux density 0.5\,arcsec resolution compared 21\,arcsec...
We present spatially resolved imaging obtained with the Australia Telescope Compact Array (ATCA) of three CO lines in two high-redshift gravitationally lensed dusty star-forming galaxies, discovered by South Pole Telescope. Strong lensing allows us to probe structure and dynamics molecular gas these objects, at z = 2.78 5.66, effective source-plane resolution less than 1 kpc. model emission from multiple transitions dust continuum a consistent manner, finding that cold as traced low-J always...
Abstract. We describe the design and execution of BORTAS (Quantifying impact BOReal forest fires on Tropospheric oxidants over Atlantic using Aircraft Satellites) experiment, which has overarching objective understanding chemical aging air masses that contain emission products from seasonal boreal wildfires how these subsequently downwind atmospheric composition. The central focus experiment was a two-week deployment UK BAe-146-301 Atmospheric Research (ARA) eastern Canada, based out...
POLARBEAR-2 (PB-2) is a cosmic microwave background (CMB) polarization experiment that will be located in the Atacama highland Chile at an altitude of 5200 m. Its science goals are to measure CMB signals originating from both primordial gravitational waves and weak lensing. PB-2 designed tensor scalar ratio, r, with precision {\sigma}(r) < 0.01, sum neutrino masses, {\Sigma}m{\nu}, {\sigma}({\Sigma}m{\nu}) 90 meV. To achieve these goals, employ 7588 transition-edge sensor bolometers 95 GHz...
SPT0311-58 is the most massive infrared luminous system discovered so far during Epoch of Reionization (EoR). In this paper, we present a detailed analysis molecular interstellar medium at z = 6.9, through high-resolution observations CO(6-5), CO(7-6), CO(10-9), [CI](2-1), and p-H2O(211-202) lines dust continuum emission with Atacama Large Millimeter/submillimeter Array (ALMA). The consists pair intensely star-forming gravitationally lensed galaxies (labelled West East). intrinsic...
The Simons Array is an expansion of the POLARBEAR cosmic microwave background (CMB) polarization experiment currently observing from Atacama Desert in Northern Chile. This will create array three 3.5m telescopes each coupled to a multichroic bolometric receiver. have sensitivity produce ≥ 5σ detection inationary gravitational waves with tensor-to-scalar ratio r 0:01, detect known minimum 58 meV sum neutrino masses 3σ confidence when combined next-generation baryon acoustic oscillation...
Aims: We present and study spatially resolved imaging obtained with the Atacama Large Millimeter/submillimeter Array (ALMA) of multiple $^{12}$CO($J=$6$-$5, 8$-$7 9$-$8) two H$_2$O(2$_{02}-$1$_{11}$ 2$_{11}-$2$_{02}$) emission lines cold dust continuum toward gravitationally lensed dusty star forming galaxy SPT0346-52 at z=$5.656$. Methods: Using a visibility-domain source-plane reconstruction we probe structure dynamics different components interstellar medium (ISM) in this down to scales 1...
We present APEX-LABOCA 870 micron observations of the fields surrounding nine brightest, high-redshift, unlensed objects discovered in South Pole Telescope's (SPT) 2500 square degrees survey. Initially seen as point sources by SPT's 1-arcmin beam, 19-arcsec resolution our new data enables us to deblend these and search for submillimetre (submm) fields. find a total 98 above threshold 3.7 sigma observed area 1300 arcminutes, where bright central cores resolve into multiple components. After...
Atmosphere is one of the most important noise sources for ground-based cosmic microwave background (CMB) experiments. By increasing optical loading on detectors, it amplifies their effective noise, while its fluctuations introduce spatial and temporal correlations between detected signals. We present a physically motivated 3d-model atmosphere total intensity emission in millimeter sub-millimeter wavelengths. derive new analytical estimate correlation detectors time-ordered data as function...
The Simons Array is a next generation cosmic microwave background (CMB) polarization experiment whose science target precision measurement of the B-mode pattern produced both by inflation and gravitational lensing. As continuation extension successful POLARBEAR experimental program, will consist three cryogenic receivers each featuring multichroic bolometer arrays mounted onto separate 3.5m telescopes. first these, also called POLARBEAR-2A, be to deploy in late 2016 has large diameter focal...