Conveners
Particle and Nuclear Astrophysics: Parallel 1 — Neutrino Astrophysics
- Wick Haxton
- Barry Davids (TRIUMF)
Particle and Nuclear Astrophysics: Parallel 3 — Nuclear Astrophysics
- Wick Haxton
- Barry Davids (TRIUMF)
Particle and Nuclear Astrophysics: Parallel 6 — Particle Astrophysics
- Barry Davids (TRIUMF)
- Wick Haxton
Particle and Nuclear Astrophysics: Parallel 8 — Neutron Stars
- Barry Davids (TRIUMF)
- Wick Haxton
Spencer Klein
29/05/2018, 14:00
PNA
Parallel
In this talk, I will present the latest results on astrophysical neutrinos from IceCube, including our non-detection of GW170817. I will also briefly present two IceCube results on the cross-section and inelasticity distributions for high-energy ($E> 1$ TeV) neutrino interactions.
Dr
Cosmin Deaconu
(UChicago / KICP)
29/05/2018, 14:20
PNA
Parallel
The ANtarctic Impulsive Transient Antenna (ANITA) long-duration balloon payload searches for Askaryan radio emission from ultra-high-energy ($>10^{18}$ eV) neutrinos interacting in Antarctic ice. ANITA is also sensitive to geomagnetic radio emission from extensive air showers. After a brief overview of the experiment, this talk will detail recently released results from the third flight of...
Dr
Mark Paris
(Los Alamos National Laboratory)
29/05/2018, 14:40
PNA
Parallel
Astronomical observations of high precision $(N_\mathrm{eff}, Y_P, \omega_b, D/H_P, \Sigma m_\nu)$ may soon over determine the cosmological standard model. An effort to constrain physics beyond the standard model with these observations is faced with the challenge of the interrelated problems of neutrino transport (via the quantum kinetic equations) and a stiff nuclear reaction network. We...
Dr
Kelly Patton
(University of Washington/Institute for Nuclear Theory)
29/05/2018, 15:00
PNA
Parallel
We present calculations of the neutrino emissivities and energy spectra from massive stars in the lead up to their explosion as supernovae (presupernovae). Results from the stellar evolution code MESA are used to calculate the neutrino emissivity due to thermal and beta processes. In particular, the beta processes are modeled in detail using a network of 204 isotopes. We show that the...
Dr
Alexey Vlasenko
(North Carolina State University)
29/05/2018, 15:20
PNA
Parallel
Neutrino flavor transformation in compact object mergers can be dominated by matter-neutrino resonances (MNRs). By efficiently converting electron neutrinos to other species, MNRs can affect nucleosynthesis and the dynamics of the merger. Prior to our work, calulations of MNR have used the single-angle approximation, only following flavor evolution along a single neutrino trajectory. ...
Prof.
Greg Christian
(Texas A&M University)
30/05/2018, 14:00
PNA
Parallel
Stellar explosions such as novae, supernovae, X-ray bursts, and neutron star mergers are responsible for the synthesis of a large fraction of the terrestrial elements. Nucleosynthesis in explosive environments is driven by rapid successions of nuclear reactions and decays. In order to understand the dynamics and isotopic yields of stellar explosions, it is essential that the rates of the...
Prof.
Frank Strieder
(South Dakota School of Mines & Technology)
30/05/2018, 14:20
PNA
Parallel
Even 60 years after the groundbreaking publication by Burbidge, Burbidge, Fowler, and Hoyle, Nuclear Astrophysics is still a thriving research field at the interface of nuclear physics, astrophysics, and particle physics. An important topic is associated with the evolution of stars and its impact on the production of heavy elements. The study of the key reactions has been a major goal by the...
Dr
Kenneth Nollett
(San Diego State University)
30/05/2018, 14:40
PNA
Parallel
Nuclear and particle astrophysics has long relied on relatively crude models of nuclear reaction rates, because computational methods are lacking for systems of more than two particles and because empirical constraints on simplified models are scarce. $\textit{Ab initio}$ methods, which model nuclei using a quantitatively accurate nucleon-nucleon interaction and reasonably complete model...
Dan Bardayan
(University of Notre Dame)
30/05/2018, 15:00
PNA
Parallel
The nucleosynthesis occurring in astrophysical explosions can be very different than that which occurs in main sequence stars such as our sun. In fact, many of the properties of explosive astrophysical events are determined by the nuclear physics of the radioactive nuclei that power the explosion. At the University of Notre Dame TwinSol radioactive beam separator, exotic nuclei of...
Roy Holt
(California Institute of Technology and Argonne National Laboratory)
30/05/2018, 15:20
PNA
Parallel
The $^{12}$C($\alpha,\gamma$)$^{16}$O reaction has a key role in nuclear astrophysics. A multilevel R-matrix analysis was used to make extrapolations of the astrophysical S factor for this reaction to the stellar energy of 300 keV. The statistical precision of the S-factor extrapolation was determined by performing multiple fits to randomized (according to the experimental errors) existing E1...
Dr
francesca giovacchini
(ciemat)
31/05/2018, 16:10
PNA
Parallel
The Alpha Magnetic Spectrometer (AMS) is a multi-purpose high-energy particle physics detector in space. It was installed on the International Space Station (ISS) in May 2011 to conduct a unique long-duration mission of fundamental physics research in space. In seven years AMS has collected more than 115 billion charged cosmic rays with energies up to TeV region performing the most precise...
Glennys Farrar
(NYU)
31/05/2018, 16:40
PNA
Parallel
This talk will have two components. The main part will survey the state-of-knowledge about UHECRs, emphasizing recent results from the Pierre Auger Observatory on anisotropies and possible source correlations. A short second part will report on multi-messenger constraints combining Auger, Fermi-LAT and IceCube data, on pure-proton and mixed-composition source models.
Andrea Albert
(SLAC)
31/05/2018, 17:10
PNA
Parallel
The High Altitude Water Cherenkov (HAWC) Observatory has been surveying the TeV sky for over 3 years. HAWC surveys 2/3rd of the sky each day with a wide field-of-view, high duty-cycle, and wide energy range. HAWC is a powerful instrument to study key aspects of particle astrophysics, including the production, propagation, and interaction of cosmic rays, searches for dark matter, and locating...
Ms
Feifei Huang
(The Pennsylvania State University)
31/05/2018, 17:30
PNA
Parallel
The IceCube Neutrino Observatory at the South Pole can measure atmospheric neutrinos at energies up to the TeV scale. DeepCore is the low-energy subarray that provides sensitivity in the neutrino energy range from roughly 10 GeV to 100 GeV, where Earth-crossing neutrinos are subject to flavor-oscillation phenomena. These neutrinos are muon and electron neutrinos produced in Earth's atmosphere...
Dr
Qian Yue
(Tsinghua University)
31/05/2018, 17:50
PNA
Parallel
China Jinping Underground Laboratory (CJPL) is the deepest laboratory and an ideal site for rare-event experiments such as dark matter, neutrinoless double beta decay, solar neutrino experiment, and so on. It is located in the Jinping Mountain, Sichuan Province, southwest China, with an overburden of about 2,400 m. The laboratory is operated by Tsinghua University and Yalong River Hydropower...
Dr
Murray Brightman
(Caltech)
31/05/2018, 18:10
PNA
Parallel
The Nuclear Spectroscopic Telescope Array (NuSTAR) is the first focusing X-ray telescope at hard energies in space. Since its launch in 2012, NuSTAR has opened up a sensitive new view on many energetic astrophysical phenomena, such as supernova explosions, black hole spin measurements and cosmic supermassive black hole accretion history. One of NuSTAR's main discoveries is that some bright...
Chris Fryer
(Los Alamos National Laboratory)
01/06/2018, 16:10
PNA
Parallel
Many of the heavy elements in the universe are produced through the rapid capture of neutrons onto iron peak elements, the so-called r-process. Sites for this crucial heavy element production are necessarily extreme and leading proposals invoke conditions at the heart of the engines behind supernovae and gamma-ray bursts. These models include neutrino-driven winds, magnetically-contained...
Dr
Benjamin Lackey
(Max Planck Institute for Gravitational Physics)
01/06/2018, 16:40
PNA
Parallel
Observations of binary neutron star mergers such as GW170817 by the LIGO and Virgo gravitational-wave detectors provide unique ways of constraining the equation of state through tidal interactions and potential observations of a post-merger signal. In this work we improve initial estimates of the parameters of GW170817 using the known source location, improved waveform modeling, additional...
Prof.
Francois Foucart
(University of New Hampshire)
01/06/2018, 17:10
PNA
Parallel
The observation of gravitational waves and electromagnetic signals powered by the merger of two neutron stars has already provided us with a wealth of information about compact objects, high-energy astrophysics, and nuclear astrophysics. To extract as much information as possible from such observations, however, a deeper understanding of the highly non-linear merger events is necessary....
Dr
Christian Drischler
(University of California, Berkeley and Lawrence Berkeley National Laboratory)
01/06/2018, 17:30
PNA
Parallel
The equation of state of (isospin-)asymmetric nuclear matter is a key quantity for nuclear astrophysics. In this talk, we discuss recent progress of microscopic calculations based on nuclear forces derived within chiral effective field theory and many-body perturbation theory. We focus in particular on applications of our improved normal-ordering method which enables the treatment of general...
Dr
Nicole Vassh
(University of Notre Dame)
01/06/2018, 17:50
PNA
Parallel
The recent observations of the GW170817 electromagnetic counterpart suggest lanthanides were produced in this neutron star merger event. Lanthanide production in heavy element nucleosynthesis is subject to large uncertainties from nuclear physics and astrophysics unknowns. Specifically, the rare-earth abundance peak, a feature of enhanced lanthanide production at $A\sim164$ seen in the solar...
Alfredo Estrade
(Central Michigan University)
01/06/2018, 18:10
PNA
Parallel
The measurement of elemental abundances in ultra-metal poor stars over the last decade, and the recent observation of a neutron-star merger event, are crucial steps towards solving one of the outstanding questions in nuclear astrophysics: the synthesis of the heaviest elements during the rapid neutron-capture process (r-process). However, and in spite of steady progress in the experimental and...
