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Carenza, Pierluca; Mastrototaro, Leonardo; Balaji, Shyam +1 more
The
Three-body exchanges with primordial black holes
Sinha, Kuver; Bhalla, Badal; Lehmann, Benjamin V. +1 more
The abundance of massive primordial black holes has historically been constrained by dynamical probes. Since these objects can participate in hard few-body scattering processes, they can readily transfer energy to stellar systems and, in particular, disrupt wide binaries. However, disruption is not the only possible outcome of such few-body proces…
Precision measurements of the magnetic parameters of LISA Pathfinder test masses
Mendes, L.; Russano, G.; Nofrarias, M. +76 more
A precise characterization of the magnetic properties of LISA Pathfinder free falling test-masses is of special interest for future gravitational wave observatory in space. Magnetic forces have an important impact on the instrument sensitivity in the low frequency regime below the millihertz. In this paper we report on the magnetic injection exper…
X-ray polarimetric features of gamma-ray bursts across varied redshifts and hints for axionlike particles
Wang, Zhongxiang; Fang, Taotao; Huang, Feng +1 more
Polarimetric features during the prompt phase of gamma-ray bursts (GRBs) have been essential for elucidating the debated emission mechanisms and gaining insight into the inner structure of GRBs. However, the potential impact of photon-axionlike particle (ALP) mixing in extragalactic magnetic fields, leading to significant modifications to the init…
Detection and characterization of quasiperiodic oscillations in the Seyfert galaxy NGC 4151
Yongkang, Yan; Peng, Zhang; Zhou, Lu +6 more
This study aims to detect and characterize quasiperiodic oscillations (QPOs) signals in x-ray observations of NGC 4151. We employed the weighted wavelet Z-transform and Lomb-Scargle periodogram methods for our analysis. QPO signals with frequencies of
SPT clusters with DES and HST weak lensing. II. Cosmological constraints from the abundance of massive halos
Sharon, K.; Gladders, M. D.; Ade, P. A. R. +195 more
We present cosmological constraints from the abundance of galaxy clusters selected via the thermal Sunyaev-Zel'dovich (SZ) effect in South Pole Telescope (SPT) data with a simultaneous mass calibration using weak gravitational lensing data from the Dark Energy Survey (DES) and the Hubble Space Telescope (HST). The cluster sample is constructed fro…
White dwarfs as a probe of exceptionally light QCD axions
Balkin, Reuven; Serra, Javi; Springmann, Konstantin +2 more
We study the effects of exceptionally light QCD axions on the stellar configuration of white dwarfs. At finite baryon density, the nonderivative coupling of the axion to nucleons displaces the axion from its in-vacuum minimum, which implies a reduction of the nucleon mass. This dramatically alters the composition of stellar remnants. In particular…
Hubble tension or distance ladder crisis?
Perivolaropoulos, Leandros
We present an up-to-date compilation of published Hubble constant (
Probing orbits of stellar mass objects deep in galactic nuclei with quasiperiodic eruptions
Pan, Zhen; Zhou, Cong; Huang, Lei +2 more
Quasiperiodic eruptions (QPEs) are intense, repeating, soft x-ray bursts with recurrence times of about a few to ten hours from nearby galactic nuclei. The origin of QPEs is still unclear. In this work, we investigate the extreme mass ratio inspiral (EMRI) + accretion disk model, where the disk is formed from a previous tidal disruption event (TDE…
Probing orbits of stellar mass objects deep in galactic nuclei with quasiperiodic eruptions. II. Population analysis
Pan, Zhen; Zhou, Cong; Huang, Lei +2 more
Quasiperiodic eruptions (QPEs) are intense repeating soft x-ray bursts with recurrence times about a few hours to a few weeks from galactic nuclei. Though the debates on the origin of QPEs have not completely settled down, more and more analyses favor the interpretation that QPEs are the result of collisions between a stellar mass object (a stella…