149 citations · 1.6k across the 58 of their papers we have counts for
58 papers
Evaluating NL2SQL via SQL2NL
Mohammadtaher Safarzadeh, Afshin Oroojlooyjadid, Dan Roth
Robust evaluation in the presence of linguistic variation is key to understanding the generalization capabilities of Natural Language to SQL (NL2SQL) models, yet existing benchmark…
A new approach to constrain the Hubble expansion rate at high redshifts by gravitational waves
Mohammadtaher Safarzadeh, Karan Jani, Nianyi Chen +2
Detection of massive binary black hole (BBH) mergers at high redshifts is a target for LISA space mission. While the individual masses of a BBH merger are redshifted, the mass rati…
Interpreting a Machine Learning Model for Detecting Gravitational Waves
Mohammadtaher Safarzadeh, Asad Khan, E. A. Huerta +1
We describe a case study of translational research, applying interpretability techniques developed for computer vision to machine learning models used to search for and find gravit…
Modeling Photoionized Turbulent Material in the Circumgalactic Medium III: Effects of Co-rotation and Magnetic Fields
Edward Buie, Evan Scannapieco, G. Mark Voit
Absorption-line measurements of the circumgalactic medium (CGM) display a highly non-uniform distribution of lower ionization state species accompanied by more widespread higher io…
A Statistical Detection of Wide Binary Systems in the Ultra-Faint Dwarf Galaxy Reticulum II
Mohammadtaher Safarzadeh, Joshua D. Simon, Abraham Loeb
Binary stars can inflate the observed velocity dispersion of stars in dark matter dominated systems such as ultra-faint dwarf galaxies (UFDs). However, the population of binaries i…
A New Challenge for Dark Matter Models
Mohammadtaher Safarzadeh, Abraham Loeb
Cold dark matter (CDM) has faced a number of challenges mainly at small scales, such as the too-big-to-fail problem, and core-cusp density profile of dwarf galaxies. Such problems…
Explaining the LIGO black hole mass function with field binaries: Revisiting Stellar Evolution at low Metallicity or Invoking Growth via gas accretion?
Mohammadtaher Safarzadeh, Enrico Ramirez-Ruiz
Our understanding of the formation and evolution of binary black holes (BBHs) is significantly impacted by the recent discoveries made by the LIGO/Virgo collaboration. Of utmost im…
The Challenge to MOND from ultra faint dwarf galaxies
Mohammadtaher Safarzadeh, Abraham Loeb
Modified Newtonian Dynamics (MOND) at low acceleration has been astonishingly powerful at explaining the flat rotation curve of galaxies and the relation between the baryonic conte…
How can LISA probe a population of GW190425-like binary neutron stars in the Milky Way?
Valeriya Korol, Mohammadtaher Safarzadeh
The nature of GW190425, a presumed binary neutron star (BNS) merger detected by the LIGO/Virgo Scientific Collaboration (LVC) with a total mass of M,…
Radiogenic Heating and its Influence on Rocky Planet Dynamos and Habitability
Francis Nimmo, Joel Primack, Sandra M. Faber +2
The thermal evolution of rocky planets on geological timescales (Gyr) depends on the heat input from the long-lived radiogenic elements potassium, thorium, and uranium. Concentrati…
A Common Origin for Low Mass Ratio Events Observed by LIGO and Virgo in the First Half of the Third Observing Run
Mohammadtaher Safarzadeh, Daniel Wysocki
In its third observing run, the LIGO/Virgo collaboration has announced a potential neutron star-black hole (NSBH) merger candidate, GW190426_152155. Together with GW190814, these t…
Formation of GW190521 via gas accretion onto Population III stellar black hole remnants born in high-redshift minihalos
Mohammadtaher Safarzadeh, Zoltán Haiman
The recent gravitational wave merger event, GW190521, has challenged our understanding of the stellar-mass black hole (BH) formation. The primary and secondary BH are both inferred…
Confronting the Magnetar Interpretation of Fast Radio Bursts Through Their Host Galaxy Demographics
Mohammadtaher Safarzadeh, J. Xavier Prochaska, Kasper E. Heintz +1
We explore the prompt magnetar progenitor scenario in the context of fast radio burst (FRB) host galaxies demographics and offset distributions. Magnetars are neutron stars with st…
Numerical Relativity Simulations of the Neutron Star Merger GW170817: Long-Term Remnant Evolutions, Winds, Remnant Disks, and Nucleosynthesis
Vsevolod Nedora, Sebastiano Bernuzzi, David Radice +7
We present a systematic numerical-relativity study of the dynamical ejecta, winds and nucleosynthesis in neutron star merger remnants. Binaries with the chirp mass compatible with…
Formation of mass gap objects in highly asymmetric mergers
Mohammadtaher Safarzadeh, Abraham Loeb
The LIGO/Virgo Collaboration (LVC) recently reported the detection of GW190814, a merger of a primary black hole (BH), and a $2.6^{+0.08}_{-0.08}~M_{\o…
Black Hole Formation in the Lower Mass Gap through Mergers and Accretion in AGN Disks
Y. Yang, V. Gayathri, I. Bartos +3
The heaviest neutron stars and lightest black holes expected to be produced by stellar evolution leave the mass-range M M largely unpop…
The nearest discovered black hole is likely not in a triple configuration
Mohammadtaher Safarzadeh, Silvia Toonen, Abraham Loeb
HR 6819 was recently claimed to be a hierarchical triple system of a Be star in a wide orbit around an inner binary system of a black hole (BH) and a B III type star. We argue that…
Was GW190412 born from a hierarchical 3+1 quadruple configuration?
Adrian S. Hamers, Mohammadtaher Safarzadeh
The gravitational wave source GW190412 is a binary black hole (BBH) merger with three unique properties: i) its mass ratio is about 0.28, the lowest found so far, ii) it has a rela…
Modeling Photoionized Turbulent Material in the Circumgalactic Medium II: Effect of Turbulence within a Stratified Medium
Edward Buie, William J. Gray, Evan Scannapieco +1
The circumgalactic medium (CGM) of nearby star-forming galaxies shows clear indications of OVI absorption accompanied by little to no detectable NV absorption. This unusual spectra…
Being Careful with the Field Formation Interpretation of GW190412
Mohammadtaher Safarzadeh, Kenta Hotokezaka
The LIGO/Virgo Scientific Collaboration recently announced the detection of a compact object binary merger, GW190412, as the first asymmetric binary black hole (BBH) merger with ma…
Constraining the delay time distribution of compact binary objects from the stochastic gravitational wave background searches
Mohammadtaher Safarzadeh, Sylvia Biscoveanu, Abraham Loeb
The initial separation of massive star binaries sets the timescale over which their compact remnants merge through the emission of gravitational waves. We show that the delay time…
The branching ratio of LIGO binary black holes
Mohammadtaher Safarzadeh
Formation of binary black holes (BBHs) detected by gravitational-wave (GW) observations could be broadly divided into two categories: those formed through field binary evolution an…
A trend in the effective spin distribution of LIGO binary black holes with mass
Mohammadtaher Safarzadeh, Will M. Farr, Enrico Ramirez-Ruiz
Binary black holes (BBHs) detected by gravitational wave (GW) observations could be broadly divided into two formation channels: those formed through field binary evolution and tho…
Does GW190425 require an alternative formation pathway than a fast-merging channel?
Mohammadtaher Safarzadeh, Enrico Ramirez-Ruiz, Edo Berger
The LIGO/Virgo Scientific Collaboration (LVC) recently announced the detection of a compact object binary merger, GW190425, with a total mass of M, an…