Bulletin of the American Physical Society
APS April Meeting 2022
Volume 67, Number 6
Saturday–Tuesday, April 9–12, 2022; New York
Session Z14: Neutrino Observations with IceCubeRecordings Available
|
Hide Abstracts |
Sponsoring Units: DAP Chair: Naoko Kurahashi Neilson, Drexel University Room: Soho |
Tuesday, April 12, 2022 3:45PM - 3:57PM |
Z14.00001: Improved IceCube angular reconstruction Tianlu Yuan The IceCube Neutrino Observatory instruments a cubic-kilometer of South Pole ice with over 5000 photmultiplier tubes (PMT). A primary science driver for IceCube is to discover the sources of high-energy astrophysical neutrinos, sources that are now beginning to come to light. Due to the sparsity of the PMTs, the inhomogenous nature of the ice, and depending on the neutrino interaction channel event reconstruction can be a challenge in IceCube. This talk will highlight recent improvements that allow more accurate directional reconstruction of IceCube events. |
Tuesday, April 12, 2022 3:57PM - 4:09PM |
Z14.00002: A Search for Coincident Neutrino Emission from Fast Radio Bursts with IceCube Mike Kovacevich, Naoko Kurahashi Neilson The IceCube Neutrino Observatory has discovered diffuse astrophysical neutrinos. Despite finding evidence for neutrino emission from sources such as TXS 0506+056, the majority of these astrophysical neutrino sources remain to be identified. Fast Radio Bursts (FRBs) are a rapidly growing class of galactic and extra-galactic astrophysical objects that could help explain the astrophysical neutrino flux. IceCube has previously performed two searches for neutrino emission with events that originate from charged current muon neutrino interactions. In this analysis, we present a search for neutrinos that are spatially and temporally coincident with 22 unique, non-repeating FRBs and one repeating FRB (FRB121102) using events that originate from all-flavor neutral current interactions as well as electron and tau neutrino charged current interactions. This event selection allows us to probe a longer range of afterglow timescales due to the low background rate. Since no statistically significant fluctuation of neutrinos was observed, we set upper limits on the time-integrated neutrino flux emitted by FRBs for a range of afterglow timescales. These are the first limits to be set on neutrino emission from FRBs with this new event selection. |
Tuesday, April 12, 2022 4:09PM - 4:21PM |
Z14.00003: Search for neutrino emission from MeV blazars in the 1FLE catalog with IceCube Michael A Campana The IceCube Neutrino Observatory has detected a diffuse flux of astrophysical neutrinos; however, its origin has yet to be fully accounted for. Recently, the first evidence for a source of astrophysical neutrinos was found from the blazar TXS 0506+056. Blazars are active galactic nuclei with a relativistic jet directed toward Earth, thereby providing ample opportunity for high-energy neutrino production. Previous searches for neutrino emission from populations of gamma-ray blazars detected in GeV and higher energies have not observed any significant neutrino excess. More recent hypotheses suggest lower-energy photons may be better indicators of TeV-PeV neutrino production. In this work, we present a likelihood analysis searching for cumulative neutrino emission from blazars in the first catalog of Fermi-LAT sources below 100 MeV (1FLE) using ten years of IceCube muon-neutrino data. We find the results of this analysis to be consistent with a background-only hypothesis and obtain upper limits on the neutrino flux from this population of blazars. |
Tuesday, April 12, 2022 4:21PM - 4:33PM |
Z14.00004: Probing magnetars as high-energy neutrino emitters with IceCube Ava Ghadimi, Marcos Santander Magnetars are neutron stars with very strong magnetic fields on the orders of 1e13 to 1e15 G. The spin-down of these objects and the power resulting from decay of magnetic fields, which produce ample near-surface photons, are in principle the two main power sources of a magnetar. Assuming both of these energy sources power the magnetar, and the magnetar is young enough, the criterion for hadronic acceleration and interactions is satisfied. These hadronic interactions would also result in the production of high-energy (HE) neutrinos. Giant flares of soft gamma-ray repeaters (a subclass of magnetars) may also produce HE neutrinos and therefore a HE neutrino flux from this class is potentially detectable. Here we present our search for neutrino emission from magnetars using 10 years of muon-neutrino candidate events from the IceCube Neutrino Observatory, a cubic kilometer neutrino detector located at the South Pole. |
Tuesday, April 12, 2022 4:33PM - 4:45PM |
Z14.00005: Search for high-energy neutrinos from hard X-ray AGN with IceCube Sreetama Goswami, Marcos Santander, George C Privon The IceCube Neutrino Observatory has detected high-energy astrophysical neutrinos in the TeV-PeV range. These neutrinos have an isotropic distribution on the sky, and therefore, likely originate from extragalactic sources. Active Galactic Nuclei form a class of astronomical objects which are promising neutrino source candidates given their high electromagnetic luminosity and potential ability to accelerate cosmic rays up to energies greater than 1016 eV. Interactions of these cosmic rays within the AGN environment are expected to produce both neutrinos and pionic gamma rays. Some hadronic models of AGN emission suggest that such gamma rays can in turn interact with the dense photon fields of AGN and cascade down to hard X-rays and MeV gamma rays. We perform a search for high-energy neutrinos emitted by i) individual hard X-ray sources selected from the Swift-BAT AGN Spectroscopic Survey (BASS) and, ii) 7 different stacking analyses using different classes of hard X-ray sources sampled from the same catalog. |
Tuesday, April 12, 2022 4:45PM - 4:57PM |
Z14.00006: Searching for Neutrinos From the Galactic Center Region with IceCube Xinyue Kang, Naoko Kurahashi Neilson The IceCube Neutrino Observatory has discovered astrophysical neutrinos. The Galactic Center (GC) has long been subject to intense astrophysics interest and is expected to emit high energy neutrinos. Many interesting phenomena such as high-mass X-ray binaries, supernova remnants, and etc., have been observed in this region. These phenomena are largely affected by a strong radio source at the GC, i.e. the super-massive black hole (Sgr. A*). A large amount of high energy neutrinos are expected to arise from these phenomena. However, the GC region is at a less sensitive part of the sky to the IceCube neutrino detector due to its location. Therefore, a dedicated dataset for the GC region needs to be created to improve data fidelity. This work focuses on event selection methods to build an analysis level dataset of the GC region. A boosted decision tree is used to select well reconstructed events and reduce data rate. Several calculations are developed to measure the stochasticity of the events. The stochasticity variables are used to reduce the high energy muon bundles, which can be mistakenly considered as single neutrino events. Comparing to a previous selection done on the southern sky, the sensitivity at the GC has been improved with this new dataset. |
Tuesday, April 12, 2022 4:57PM - 5:09PM |
Z14.00007: Constraints on neutrino source populations from neutrino searches in the directions of IceCube alerts Alex Pizzuto, Justin Vandenbroucke, Abhishek Desai, Aswathi Balagopal V., Jessica N Thwaites Whenever the IceCube Neutrino Observatory detects a neutrino candidate with a high probability of astrophysical origin, it sends out a public alert. Followups of these alerts have led to major successes in neutrino astronomy, such as with the case of the blazar TXS 0506+056. Here, we show how searching for additional, lower energy, neutrinos in the directions of these neutrino alerts can aid in identifying cosmic neutrino sources. We also discuss how such an analysis provides a handle for understanding populations of astrophysical neutrino sources. After searching for neutrino emission coincident with these alert events on various timescales, we find no significant evidence of additional neutrino emission on time scales from minutes to years in the directions of these alert events. Correspondingly, assuming sources have the same luminosities and number densities that track star-formation rates (with no cosmic evolution), this study shows that a population of neutrino sources must be more numerous than $7\times 10^{-9}$ Mpc$^{-3}$ ($3\times 10^{-7}$ Mpc$^{-3}$) to be responsible for the entire diffuse astrophysical neutrino flux. |
Tuesday, April 12, 2022 5:09PM - 5:21PM |
Z14.00008: Measurement of the Astrophysical Neutrino Flux using Muon Neutrinos in IceCube Manuel Silva, Albrecht Karle
|
Tuesday, April 12, 2022 5:21PM - 5:33PM |
Z14.00009: Multi-Flavor 10PeV+ neutrino search with IceCube Winnie Wang, Emre Yildizci, Lu Lu IceCube, a cubic kilometer neutrino detector located at the South Pole, reported detection of a shower that was indicative of a Glashow resonance initiated by a neutrino with an energy of 6.3 PeV. Observing highly energetic events like this one are critical as they contain crucial information on its originating source. Current literature suggests that a neutrino flux at ~10PeV is key to test a possible common origin of high-energy neutrinos with ultra-high-energy cosmic rays. We present a novel method to efficiently reject cosmic-ray muon background by detecting hit patterns inconsistent with the neutrino hypothesis. A dedicated high-energy partially-contained cascade selection aiming at detection of neutrinos of 10PeV and beyond will be reported. |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2025 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700