Astrophysics and Cosmology Research at the JBCA 2020-2023
Lead Research Organisation:
University of Manchester
Department Name: Physics and Astronomy
Abstract
This grant supports the research of the Jodrell Bank Centre for Astrophysics at the University of Manchester. Our research is a divided into 3 groups. There are too many specific proposals to describe in detail, do below we have given a brief layman's explanation of the work being carried out by the three groups.
Cosmology: This is the study of the Universe as a whole. The main aim is to understand the processes by which the large scale feature of the Universe formed and to constrain the various different kinds of matter that existed within it. These include dark matter and dark energy which are thought to constitute more than 95% of the total. We do this by comparison to observations of weak and strong gravitational lensing which is the distortion of light predicted to be caused by massive objects in Einstein' Theory of General Relativity, the cosmic microwave background which is the faint emission of radiation created at the time when protons and electrons come together to form hydrogen and the emission given off by neutral hydrogen atoms in galaxies. The research we propose here involves both theory and observation as well as the development of the technology necessary to make the observations possible.
Sun, Stars and Galaxies: The researchers in this group study a wide range of astrophysical processes that are reasonable for the formation and evolution of the objects in the name of the group. Specific key areas that the group is interested in are the formation of stars much larger than the Sun and the subsequent evolution, the properties of the so-called interstellar medium (ISM) which comprises molecules not bound to stars and the magnetic fields that permeate space.
Pulsars and Time Domain Astrophysics: The focus of this group is astrophysical signatures that are changing with time- things which come on and off, often with some kind of regularity. These include Pulsars which are a non-standard star type, known as a neutron star, which is a dead star supported by the quantum pressure of neutrons. The radio emission from these objects pulses on an off with extraordinary regularity allowing them to acts cosmic clocks. The constantly measuring these clocks as the neutron stars spin and move through space, often impacted on by a companion star, allows the most precise constraints on the nature of gravity outside the solar system. Other phenomena studied by this group include Nova explosions, other variable stars, and variability induced by the lensing effects of one star passing in front of another, called microlensing.
Cosmology: This is the study of the Universe as a whole. The main aim is to understand the processes by which the large scale feature of the Universe formed and to constrain the various different kinds of matter that existed within it. These include dark matter and dark energy which are thought to constitute more than 95% of the total. We do this by comparison to observations of weak and strong gravitational lensing which is the distortion of light predicted to be caused by massive objects in Einstein' Theory of General Relativity, the cosmic microwave background which is the faint emission of radiation created at the time when protons and electrons come together to form hydrogen and the emission given off by neutral hydrogen atoms in galaxies. The research we propose here involves both theory and observation as well as the development of the technology necessary to make the observations possible.
Sun, Stars and Galaxies: The researchers in this group study a wide range of astrophysical processes that are reasonable for the formation and evolution of the objects in the name of the group. Specific key areas that the group is interested in are the formation of stars much larger than the Sun and the subsequent evolution, the properties of the so-called interstellar medium (ISM) which comprises molecules not bound to stars and the magnetic fields that permeate space.
Pulsars and Time Domain Astrophysics: The focus of this group is astrophysical signatures that are changing with time- things which come on and off, often with some kind of regularity. These include Pulsars which are a non-standard star type, known as a neutron star, which is a dead star supported by the quantum pressure of neutrons. The radio emission from these objects pulses on an off with extraordinary regularity allowing them to acts cosmic clocks. The constantly measuring these clocks as the neutron stars spin and move through space, often impacted on by a companion star, allows the most precise constraints on the nature of gravity outside the solar system. Other phenomena studied by this group include Nova explosions, other variable stars, and variability induced by the lensing effects of one star passing in front of another, called microlensing.
Planned Impact
The range of research we undertake and the world-class facilities within and in close association with JBCA (the Jodrell Bank Discovery Centre, e-MERLIN, the Lovell Telescope, the ALMA ARC and the SKA HQ) will provide key pathways to increasing our already strong impact on UK and global industry, the next generation of scientists and engineers, and the general public. The University's investment in the Jodrell Bank site combined with significant external funding (e.g. from Heritage Lottery Fund) will enable us to expand its use as an iconic venue for public and industrial engagement. The programme described here formed a key part of the School's submission for REF2014, helping it to be ranked highest in the REF for physics impact with 83% at 4* and 17% at 3*. Our outreach \& public engagement programme is extremely strong and continues to grow, particularly through its work with the University's award-winning Jodrell Bank Discovery Centre and the BBC. With the recent decision on SKA HQ location and our strong research work in this area, there is also growing impact in both outreach and industrial engagement in this area.
Our "Pathways to Impact" statement in the case for support outlines things that we have done in recent times under the headings of "Outreach and Public Engagement" and "Industrial and economic impact". We list some highlights below.
- Jodcast: Podcast run by students with 7000 regular listeners.
- 215000 Twitter and 18000 Facebook followers
- Stargazing live, Pulsar Hunters, Science Programmes presented by Danielle George
- JB Discovery centre with 190000 visitors per year
- Award winning Bluedot Festivals
- Industry contracts for SKA work including CISCO, AASL, NPL, AEON, Critical Software, MMI, GEANT
- Newton programme for Radio Astronomy in Africa.
Our "Pathways to Impact" statement in the case for support outlines things that we have done in recent times under the headings of "Outreach and Public Engagement" and "Industrial and economic impact". We list some highlights below.
- Jodcast: Podcast run by students with 7000 regular listeners.
- 215000 Twitter and 18000 Facebook followers
- Stargazing live, Pulsar Hunters, Science Programmes presented by Danielle George
- JB Discovery centre with 190000 visitors per year
- Award winning Bluedot Festivals
- Industry contracts for SKA work including CISCO, AASL, NPL, AEON, Critical Software, MMI, GEANT
- Newton programme for Radio Astronomy in Africa.
Organisations
Publications
Aaboud M
(2020)
Measurements of top-quark pair spin correlations in the $$e\mu $$ channel at $$\sqrt{s} = 13$$ TeV using pp collisions in the ATLAS detector
in The European Physical Journal C
Aaboud M
(2020)
Determination of jet calibration and energy resolution in proton-proton collisions at $$\sqrt{s} = 8~\hbox {TeV}$$ using the ATLAS detector
in The European Physical Journal C
Aad G
(2020)
Search for a scalar partner of the top quark in the all-hadronic $$t{\bar{t}}$$ plus missing transverse momentum final state at $$\sqrt{s}=13$$ TeV with the ATLAS detector
in The European Physical Journal C
Aad G
(2020)
Search for top squarks in events with a Higgs or Z boson using 139 fb$$^{-1}$$ of pp collision data at $$\sqrt{s}=13$$ TeV with the ATLAS detector
in The European Physical Journal C
Aad G
(2020)
Performance of the ATLAS muon triggers in Run 2
in Journal of Instrumentation
Aad G
(2020)
A search for the Z? decay mode of the Higgs boson in pp collisions at s = 13 TeV with the ATLAS detector
in Physics Letters B
Aad G
(2020)
Erratum to: Measurement of differential cross sections for single diffractive dissociation in $$ \sqrt{s} $$ = 8 TeV pp collisions using the ATLAS ALFA spectrometer
in Journal of High Energy Physics
Aad G
(2020)
Search for heavy diboson resonances in semileptonic final states in pp collisions at $$\sqrt{s}=13$$ TeV with the ATLAS detector
in The European Physical Journal C
Aad G
(2021)
A search for the dimuon decay of the Standard Model Higgs boson with the ATLAS detector
in Physics Letters B
Aad G
(2021)
Erratum to: Higgs boson production cross-section measurements and their EFT interpretation in the $$4\ell $$ decay channel at $$\sqrt{s}=$$13 TeV with the ATLAS detector
in The European Physical Journal C
Aad G
(2020)
Alignment of the ATLAS Inner Detector in Run 2
in The European Physical Journal C
Aad G
(2021)
Measurement of the jet mass in high transverse momentum Z ( ? b b ? ) ? production at s = 13 TeV using the ATLAS detector
in Physics Letters B
Aad G
(2020)
Measurement of the Lund Jet Plane Using Charged Particles in 13 TeV Proton-Proton Collisions with the ATLAS Detector.
in Physical review letters
Aad G
(2021)
Search for phenomena beyond the Standard Model in events with large b-jet multiplicity using the ATLAS detector at the LHC
in The European Physical Journal C
Aad G
(2020)
Search for Higgs Boson Decays into a Z Boson and a Light Hadronically Decaying Resonance Using 13 TeV pp Collision Data from the ATLAS Detector.
in Physical review letters
Aad G
(2020)
Performance of the upgraded PreProcessor of the ATLAS Level-1 Calorimeter Trigger
in Journal of Instrumentation
Aad G
(2020)
Higgs boson production cross-section measurements and their EFT interpretation in the $$4\ell $$ decay channel at $$\sqrt{s}=$$13 TeV with the ATLAS detector
in The European Physical Journal C
Aad G
(2020)
Search for light long-lived neutral particles produced in pp collisions at $$\sqrt{s} = 13~\mathrm {TeV}$$ and decaying into collimated leptons or light hadrons with the ATLAS detector
in The European Physical Journal C
Aad G
(2020)
Search for Heavy Resonances Decaying into a Photon and a Hadronically Decaying Higgs Boson in pp Collisions at sqrt[s]=13 TeV with the ATLAS Detector.
in Physical review letters
Aad G
(2020)
Measurement of the transverse momentum distribution of Drell-Yan lepton pairs in proton-proton collisions at $$\sqrt{s}=13\,$$TeV with the ATLAS detector
in The European Physical Journal C
Aad G
(2020)
Reconstruction and identification of boosted di-t systems in a search for Higgs boson pairs using 13 TeV proton-proton collision data in ATLAS
in Journal of High Energy Physics
Aad G
(2020)
Measurement of the t t ¯ production cross-section in the lepton+jets channel at s = 13 TeV with the ATLAS experiment
in Physics Letters B
Aad G
(2020)
Evidence for electroweak production of two jets in association with a Z? pair in pp collisions at s = 13 TeV with the ATLAS detector
in Physics Letters B
Aad G
(2020)
CP Properties of Higgs Boson Interactions with Top Quarks in the tt[over ¯]H and tH Processes Using H??? with the ATLAS Detector.
in Physical review letters
Aad G
(2020)
Measurements of the Higgs boson inclusive and differential fiducial cross sections in the 4$$\ell $$ decay channel at $$\sqrt{s}$$ = 13 TeV
in The European Physical Journal C
Aad G
(2020)
Search for Heavy Higgs Bosons Decaying into Two Tau Leptons with the ATLAS Detector Using pp Collisions at sqrt[s]=13 TeV.
in Physical review letters
Aad G
(2020)
Dijet Resonance Search with Weak Supervision Using sqrt[s]=13 TeV pp Collisions in the ATLAS Detector.
in Physical review letters
Aad G
(2020)
Evidence for $$t\bar{t}t\bar{t}$$ production in the multilepton final state in proton-proton collisions at $$\sqrt{s}=13$$ $$\text {TeV}$$ with the ATLAS detector
in The European Physical Journal C
Aad G
(2020)
ATLAS data quality operations and performance for 2015-2018 data-taking
in Journal of Instrumentation
Aad G
(2021)
Measurements of top-quark pair single- and double-differential cross-sections in the all-hadronic channel in pp collisions at $$ \sqrt{\mathrm{s}} $$ = 13 TeV using the ATLAS detector
in Journal of High Energy Physics
Aad G
(2020)
Observation and Measurement of Forward Proton Scattering in Association with Lepton Pairs Produced via the Photon Fusion Mechanism at ATLAS.
in Physical review letters
Abazajian K
(2022)
CMB-S4: Forecasting Constraints on Primordial Gravitational Waves
in The Astrophysical Journal
Abbate F
(2020)
Giant pulses from J1823-3021A observed with the MeerKAT telescope
in Monthly Notices of the Royal Astronomical Society
Abbate F
(2023)
A MeerKAT look at the polarization of 47 Tucanae pulsars: magnetic field implications
in Monthly Notices of the Royal Astronomical Society
Abbate F
(2022)
Four pulsar discoveries in NGC 6624 by TRAPUM using MeerKAT
in Monthly Notices of the Royal Astronomical Society
Abbott B
(2020)
Erratum: "Searches for Gravitational Waves from Known Pulsars at Two Harmonics in 2015-2017 LIGO Data" (2019, ApJ, 879, 10)
in The Astrophysical Journal
Abbott R
(2022)
Narrowband Searches for Continuous and Long-duration Transient Gravitational Waves from Known Pulsars in the LIGO-Virgo Third Observing Run
in The Astrophysical Journal
Abbott R
(2022)
Searches for Gravitational Waves from Known Pulsars at Two Harmonics in the Second and Third LIGO-Virgo Observing Runs
in The Astrophysical Journal
Abbott R
(2020)
Gravitational-wave Constraints on the Equatorial Ellipticity of Millisecond Pulsars
in The Astrophysical Journal Letters
Abbott T
(2022)
Dark Energy Survey Year 3 results: Cosmological constraints from galaxy clustering and weak lensing
in Physical Review D
Abbott T
(2023)
Joint analysis of Dark Energy Survey Year 3 data and CMB lensing from SPT and Planck . III. Combined cosmological constraints
in Physical Review D
Abbott T
(2021)
The Dark Energy Survey Data Release 2
in The Astrophysical Journal Supplement Series
Title | IPTA DR2 - GWB analysis MCMC output |
Description | IPTA DR2 common red noise, MCMC output These files are the primary output from a Markov chain Monte Carlo (MCMC) sampling process. They are samples from the posterior probability distribution for a particular model described in the companion paper. Each zipped tarball contains four files. The "chain" file has several tab-separated columns, each of which corresponds to a model parameter, except the last four which are metadata. The parameter names (including metadata) are listed in the companion "params" file. The frequencies used in the common red noise models are listed in the "crn_frequencies" file. Additional information is provided in a README file. Each row of the chain file is one sample from the model posterior. The first samples at the beginning of the MCMC are the "burn-in" phase, before the chain has converged to the posterior. We recommend discarding the first ~25% of samples before using them to make inferences. |
Type Of Material | Database/Collection of data |
Year Produced | 2022 |
Provided To Others? | Yes |
URL | https://zenodo.org/record/5787556 |