Md Faisal Alam
A5082843603- Pulsars and Gravitational Waves Research
- Radio Astronomy Observations and Technology
- Atomic and Molecular Physics
- Gamma-ray bursts and supernovae
- Advanced Frequency and Time Standards
- Climate Change, Adaptation, Migration
- Quantum Chromodynamics and Particle Interactions
- Geophysics and Sensor Technology
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Superconducting and THz Device Technology
- Migration and Labor Dynamics
- Particle Accelerators and Free-Electron Lasers
- Mathematical functions and polynomials
Franklin & Marshall College
2018-2023
Urbana University
2023
Bangladesh University
2023
Meta (United States)
2019
Northeastern University
2019
University of Illinois Urbana-Champaign
2019
Pennsylvania State University
2019
Menlo School
2019
Abstract We present observations and timing analyses of 68 millisecond pulsars (MSPs) comprising the 15 yr data set North American Nanohertz Observatory for Gravitational Waves (NANOGrav). NANOGrav is a pulsar array (PTA) experiment that sensitive to low-frequency gravitational waves (GWs). This NANOGrav’s fifth public release, including both “narrowband” “wideband” time-of-arrival (TOA) measurements corresponding models. have added 21 MSPs extended our baselines by 3 yr, now spanning nearly...
We present time-of-arrival (TOA) measurements and timing models of 47 millisecond pulsars (MSPs) observed from 2004 to 2017 at the Arecibo Observatory Green Bank Telescope by North American Nanohertz for Gravitational Waves (NANOGrav). The observing cadence was three four weeks most over this time span, with weekly observations six sources. These data were collected use in low-frequency gravitational wave searches other astrophysical purposes. detail our observational methods a set TOA...
We present a newly implemented single-pulse pipeline for the PALFA survey to efficiently identify single radio pulses from pulsars, Rotating Radio Transients (RRATs) and Fast Bursts (FRBs). have conducted sensitivity analysis of this new in which multiple with wide range parameters were injected into data sets run through pipeline. Based on recovered pulses, we find that pulse widths $\rm < 5\ ms$ is at most factor \sim 2$ less sensitive than our theoretical predictions. For > 10\ ms$, as...
We present a new analysis of the profile data from 47 millisecond pulsars comprising 12.5-year set North American Nanohertz Observatory for Gravitational Waves (NANOGrav), which is presented in parallel paper (Alam et al. 2021a; NG12.5). Our reprocessing performed using "wideband" timing methods, use frequency-dependent template profiles, simultaneous time-of-arrival (TOA) and dispersion measure (DM) measurements broadband observations, novel techniques. In particular, wideband DM are used...
Abstract We report on the latest results of a Parkes multibeam survey for pulsars and dispersed radio bursts in Large Magellanic Cloud (LMC). conducted both periodicity single-pulse searches at much larger range trial dispersion measures (DMs) than previously searched. detected 229 single pulses with signal-to-noise ratio (S/N) > 7 that were classified by deep-learning network FETCH as being real (with >90% likelihood), which nine from known giant-pulse-emitting pulsar PSR B0540−69....
We explore the quantum Coulomb problem for two-body bound states, in $D=3$ and $D=3\ensuremath{-}2\ensuremath{\epsilon}$ dimensions, detail, give an extensive list of expectation values that arise evaluation QED corrections to bound-state energies. describe techniques used obtain these general formulas integrals involving associated Laguerre polynomials. In addition, we subtracted polynomials, those with low powers variable off, when evaluating divergent values. present perturbative results...
We report on progress in the calculation of corrections to positronium energy levels order $m \alpha^7$. Corrections at this level will be needed for interpretation results upcoming measurements. A procedure high has been developed based Bethe-Salpeter equation dimensionally regularized NRQED and method regions. demonstrate effectiveness approach by using it obtain all pure recoil energies $O(m \alpha^6)$ a unified manner.
A mixed-methods strategy is utilized in this study to analyze climate-induced migration Khulna, Bangladesh.Climate-induced displace 7.1 million Bangladeshi migrants 2022, with a projected increase 13.3 by 2050 when social and economic vulnerabilities are driving migration, particularly affecting marginalized groups.In article, 300 individuals surveyed Khulna's urban slums where the results reveal that 52% lack educational qualifications, leading conflicts unsustainable wages.Vocational...