output
19912026
Showing 2023 · astro-ph.HEShow all

36 papers · 2 filters

astro-ph.HE2023★ 2 cited

Estimating Ejecta Mass Ratios in Kepler's SNR: Global X-Ray Spectral Analysis Including Suzaku Systematics and Emitting Volume Uncertainties

Tyler Holland-Ashford, Patrick Slane, Laura A. Lopez +2

The exact origins of many Type Ia supernovae$\unicode{x2013}$progenitor scenarios and explosive mechanisms$\unicode{x2013}$remain uncertain. In this work, we analyze the global Suz…

astro-ph.HE2023

Evidence of a Massive Stellar Disruption in the X-ray Spectrum of ASASSN-14li

J. M. Miller, B. Mockler, E. Ramirez-Ruiz +7

The proximity and duration of the tidal disruption event (TDE) ASASSN-14li led to the discovery of narrow, blue-shifted absorption lines in X-rays and UV. The gas seen in X-ray abs…

astro-ph.HE2023

Probing extreme astrophysical accelerators through neutrino anisotropy

Marco Stein Muzio, Noémie Globus

We present the extent to which anisotropies in the ultrahigh energy neutrino sky can probe the distribution of extreme astrophysical accelerators in the universe. In this talk, we…

astro-ph.HE2023★ 15 cited

Probing the Soft X-ray Properties and Multi-Wavelength Variability of SN2023ixf and its Progenitor

Sonja Panjkov, Katie Auchettl, Benjamin J. Shappee +3

We present a detailed analysis of nearly two decades of optical/UV and X-ray data to study the multi-wavelength pre-explosion properties and post-explosion X-ray properties of near…

astro-ph.HE2023★ 25 cited

Ground-based and JWST Observations of SN 2022pul: II. Evidence from Nebular Spectroscopy for a Violent Merger in a Peculiar Type-Ia Supernova

Lindsey A. Kwok, Matthew R. Siebert, Joel Johansson +78

We present an analysis of ground-based and JWST observations of SN~2022pul, a peculiar "03fg-like" (or "super-Chandrasekhar") Type Ia supernova (SN Ia), in the nebular phase at 338…

astro-ph.HE2023★ 22 cited

Multiwavelength Constraints on the Origin of a Nearby Repeating Fast Radio Burst Source in a Globular Cluster

Aaron B. Pearlman, Paul Scholz, Suryarao Bethapudi +26

The precise origins of fast radio bursts (FRBs) remain unknown. Multiwavelength observations of nearby FRB sources can provide important insights into the enigmatic FRB phenomenon.…

astro-ph.HE2023★ 18 cited

The unseen host galaxy and high dispersion measure of a precisely-localised Fast Radio Burst suggests a high-redshift origin

Lachlan Marnoch, Stuart D. Ryder, Clancy W. James +13

FRB 20210912A is a fast radio burst (FRB), detected and localised to sub-arcsecond precision by the Australian Square Kilometre Array Pathfinder. No host galaxy has been identified…

astro-ph.HE2023★ 9 cited

Multiwavelength observations of PSR J2021+4026 across a mode change reveal a phase shift in its X-ray emission

M. Razzano, A. Fiori, P. M. Saz Parkinson +6

Context. We have investigated the multiwavelength emission of PSR J2021+4026, the only isolated gamma-ray pulsar known to be variable, which in October 2011 underwent a simultaneou…

astro-ph.HE2023★ 169 cited

The Third Fermi Large Area Telescope Catalog of Gamma-ray Pulsars

David A. Smith, Philippe Bruel, Colin J. Clark +156

We present 294 pulsars found in GeV data from the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope. Another 33 millisecond pulsars (MSPs) discovered in deep radio…

astro-ph.HE2023★ 29 cited

A fast radio burst localized at detection to an edge-on galaxy using very-long-baseline interferometry

Tomas Cassanelli, Calvin Leung, Pranav Sanghavi +48

Fast radio bursts (FRBs) are millisecond-duration, luminous radio transients of extragalactic origin. These events have been used to trace the baryonic structure of the Universe us…

astro-ph.HE2023★ 17 cited

Searching for Exploding Black Holes

Xavier Boluna, Stefano Profumo, Juliette Blé +1

The observation of the final stages of the evaporation of a light black hole, which Hawking referred to as ``black hole explosion", would offer critical insights on quantum gravity…

astro-ph.HE2023★ 14 cited

An X-ray Census of Fast Radio Burst Host Galaxies: Constraints on AGN and X-ray Counterparts

T. Eftekhari, W. Fong, A. C. Gordon +16

We present the first X-ray census of fast radio burst (FRB) host galaxies to conduct the deepest search for AGN and X-ray counterparts to date. Our sample includes seven well-local…

astro-ph.HE2023★ 14 cited

Probing pre-supernova mass loss in double-peaked Type Ibc supernovae from the Zwicky Transient Facility

Kaustav K. Das, Mansi M. Kasliwal, Jesper Sollerman +34

Eruptive mass loss of massive stars prior to supernova (SN) explosion is key to understanding their evolution and end fate. An observational signature of pre-SN mass loss is the de…

astro-ph.HE2023★ 6 cited

Observational properties of a bright type Iax SN 2018cni and a faint type Iax SN 2020kyg

Mridweeka Singh, Devendra. K. Sahu, Raya Dastidar +29

We present the optical photometric and spectroscopic analysis of two type Iax SNe 2018cni and 2020kyg. SN 2018cni is a bright type Iax SN (M = 17.810.21 mag) whe…

astro-ph.HE2023★ 9 cited

VERITAS discovery of very high energy gamma-ray emission from S3 1227+25 and multiwavelength observations

Atreya Acharyya, Colin Adams, Avery Archer +68

We report the detection of very high energy gamma-ray emission from the blazar S3 1227+25 (VER J1230+253) with the Very Energetic Radiation Imaging Telescope Array System (VERITAS)…

astro-ph.HE2023★ 45 cited

A radio-emitting outflow produced by the tidal disruption event AT2020vwl

A. J. Goodwin, K. D. Alexander, J. C. A. Miller-Jones +12

A tidal disruption event (TDE) occurs when a star is destroyed by a supermassive black hole. Broadband radio spectral observations of TDEs trace the emission from any outflows or j…

astro-ph.HE2023★ 9 cited

Catching a nova X-ray/UV flash in the visible? Early spectroscopy of the extremely slow Nova Velorum 2022 (Gaia22alz)

E. Aydi, L. Chomiuk, J. Mikołajewska +22

We present early spectral observations of the very slow Galactic nova Gaia22alz, over its gradual rise to peak brightness that lasted 180 days. During the first 50 days, when the n…

astro-ph.HE2023★ 20 cited

Searching For Stochastic Gravitational Waves Below a Nanohertz

William DeRocco, Jeff A. Dror

The stochastic gravitational-wave background is imprinted on the times of arrival of radio pulses from millisecond pulsars. Traditional pulsar timing analyses fit a timing model to…

astro-ph.HE2023★ 19 cited

Multiwavelength observations of the extraordinary accretion event AT2021lwx

P. Wiseman, Y. Wang, S. Hönig +43

We present observations from X-ray to mid-infrared wavelengths of the most energetic non-quasar transient ever observed, AT2021lwx. Our data show a single optical brightening by a…

astro-ph.HE2023★ 25 cited

Chaotic Gas Accretion by Black Holes Embedded in AGN Discs as Cause of Low-spin Signatures in Gravitational Wave Events

Yi-Xian Chen, Douglas N. C. Lin

Accretion discs around super-massive black holes (SMBH) not only power active galactic nuclei (AGNs), but also host single and binary embedded stellar-mass black holes (EBHs) that…

astro-ph.HE2023★ 143 cited

Fermi-GBM Discovery of GRB 221009A: An Extraordinarily Bright GRB from Onset to Afterglow

S. Lesage, P. Veres, M. S. Briggs +136

We report the discovery of GRB 221009A, the highest flux gamma-ray burst ever observed by the Fermi Gamma-ray Burst Monitor (GBM). This GRB has continuous prompt emission lasting m…

astro-ph.HE2023★ 17 cited

Late-time Hubble Space Telescope Observations of AT 2018cow. II. Evolution of a UV bright Underlying Source 2--4 Yr Post-discovery

Yuyang Chen, Maria R. Drout, Anthony L. Piro +4

In this second of a two-paper series, we present a detailed analysis of three HST observations taken 2--4 years post-discovery, examining the evolution of a UV-bright underly…

astro-ph.HE2023★ 9 cited

Late-time Hubble Space Telescope Observations of AT 2018cow. I. Further Constraints on the Fading Prompt Emission and Thermal Properties 50--60 Days Post-discovery

Yuyang Chen, Maria R. Drout, Anthony L. Piro +6

The exact nature of the luminous fast blue optical transient AT 2018cow is still debated. In this first of a two-paper series, we present a detailed analysis of three Hubble Space…

astro-ph.HE2023★ 20 cited

AGN STORM 2. III. A NICER view of the variable X-ray obscurer in Mrk 817

Ethan R. Partington, Edward M. Cackett, Erin Kara +44

The AGN STORM 2 collaboration targeted the Seyfert 1 galaxy Mrk 817 for a year-long multiwavelength, coordinated reverberation mapping campaign including HST, Swift, XMM-Newton, NI…