Kavli Affiliate: Vahe Petrosian | Summary:Gamma-ray bursts (GRBs) are classified as long (LGRBs) and short (SGRBs), with collapsars and compact-object mergers (NS-NS or NS-Black Holes) as progenitors, respectively. LGRBs are expected to follow the cosmic star formation rate (SFR), while SGRBs follow a delayed version of the SFR. However, this division has come under question, […]
Kavli Affiliate: Vahe Petrosian | Summary:Gamma Ray Bursts (GRBs) are classified as long (LGRBs) and short (SGRBs) with collapsars and compact object mergers (neutron star (NS)-NS or NS-Black hole) as progenitors, respectively. The former are expected to follow the cosmic star formation rate (SFR), while the latter follows a delayed version of the SFR. However, […]
Kavli Affiliate: Eric Miller| First 5 Authors: Mansi M. Kasliwal, Mansi M. Kasliwal, , , | Summary:On August 18, 2025, the LIGO-Virgo-KAGRA collaboration reported gravitational waves from a sub-threshold binary neutron star merger. If astrophysical, this event would have a surprisingly low chirp mass, suggesting that at least one neutron star was below a solar […]
Kavli Affiliate: Andrew Vanderburg | Summary:Young stars host only a small fraction of the known exoplanet population because their photometric variability, magnetic activity, and frequent placement in dense, poorly-resolved regions hamper exoplanet detections. Yet, measuring planets at these ages is crucial since these phases are when dynamical processes that drive planetary migration are most active. […]
Kavli Affiliate: Debora Sijacki | Summary:We present a suite of high-resolution simulations to study how different stellar feedback channels regulate the growth of central intermediate-mass black holes (IMBHs) in dwarf galaxies hosting nuclear star clusters (NSCs). We employ a super-Lagrangian refinement scheme to resolve the self-gravity radius of the $α$-accretion disc ($<0.01$~pc) and follow the […]
Kavli Affiliate: Debora Sijacki | Summary:We present a suite of high-resolution simulations to study how different stellar feedback channels regulate the growth of central intermediate-mass black holes (IMBHs) in dwarf galaxies hosting nuclear star clusters (NSCs). We employ a super-Lagrangian refinement scheme to resolve the self-gravity radius of the $α$-accretion disc ($<0.01$~pc) and follow the […]
Kavli Affiliate: Gregory Herczeg | Summary:We present the results of the first high-sensitivity NUV (1800 to 3200 Å) survey of FU Ori objects, using the textitHubble Space Telescope (HST) STIS spectrograph. We compare new low resolution spectra for 6 sources with predictions from accretion disk models and find that all show emission in excess of […]
Kavli Affiliate: Gregory J. Herczeg | First 5 Authors: Adolfo S. Carvalho, Adolfo S. Carvalho, , , | Summary: We present the results of the first high-sensitivity NUV (1800 to 3200 AA) survey of FU Ori objects, using the textitHubble Space Telescope (HST) STIS spectrograph. We compare new low resolution spectra for 6 sources with […]
Kavli Affiliate: Nicola Omodei | Summary:Magnetar giant flares (MGFs) are rare, extremely bright bursts of gamma-rays from highly magnetized neutron stars. These events are challenging to identify because, at extragalactic distances, they can appear similar to other astrophysical phenomena. Only a handful have been confidently identified to date, limiting our understanding of their origin and […]
Kavli Affiliate: Long Zhang | First 5 Authors: Long Zhang, Long Zhang, , , | Summary: Emerging altermagnets offer a promising avenue for spintronics, yet their integration into magnetic tunnel junctions has been hindered by reliance on ferromagnetic electrodes (introducing stray fields) or limited functionality (non-tunable magnetoresistance without spin filtering). Here, we propose an all-altermagnetic […]