Frederick Lamb

· Research Professor

University of Illinois Urbana-Champaign · Arms Control & Domestic and International Security

Active 1972–2024

h-index47

Citations9.0k

Papers2738 last 5y

Funding$777k

Academic metrics are sourced from OpenAlex and public funding records; values may differ from Google Scholar.

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About

Frederick Lamb is a Research Professor affiliated with The Program in Arms Control & Domestic and International Security at the Illinois Global Institute. His contact information includes an office at 1110 W. Green M/C 704 Urbana, IL 61801, and an email address at fkl@illinois.edu. He is involved in research related to arms control and security studies, contributing to the academic and policy-oriented work within the program. His role supports the mission of the program and the broader goals of the Illinois Global Institute, focusing on domestic and international security issues.

Research topics

Physics
Nuclear physics
Astrophysics

Selected publications

Constraining the Equation of State of High-density Cold Matter Using Nuclear and Astronomical Measurements
The Astrophysical Journal · 2019-12-27 · 124 citations
articleOpen accessSenior author
Abstract The increasing richness of data related to cold dense matter, from laboratory experiments to neutron-star observations, requires a framework for constraining the properties of such matter that makes use of all relevant information. Here, we present a rigorous but practical Bayesian approach that can include diverse evidence, such as nuclear data and the inferred masses, radii, tidal deformabilities, moments of inertia, and gravitational binding energies of neutron stars. We emphasize th…
Publisher OA PDF DOI
A More Precise Measurement of the Radius of PSR J0740+6620 Using Updated NICER Data
The Astrophysical Journal · 2024-10-01 · 100 citations
articleOpen access
Abstract PSR J0740+6620 is the neutron star with the highest precisely determined mass, inferred from radio observations to be 2.08 ± 0.07 M ⊙ . Measurements of its radius therefore hold promise to constrain the properties of the cold, catalyzed, high-density matter in neutron star cores. Previously, Miller et al. and Riley et al. reported measurements of the radius of PSR J0740+6620 based on Neutron Star Interior Composition Explorer (NICER) observations accumulated through 2020 April 17, and a…
Publisher DOI
NICER Observes the Effects of an X-Ray Burst on the Accretion Environment in Aql X-1
The Astrophysical Journal Letters · 2018-02-28 · 49 citations
articleOpen access
Abstract Accretion disks around neutron stars regularly undergo sudden strong irradiation by Type-I X-ray bursts powered by unstable thermonuclear burning on the stellar surface. We investigate the impact on the disk during one of the first X-ray burst observations with the Neutron Star Interior Composition Explorer ( NICER ) on the International Space Station. The burst is seen from Aql X-1 during the hard spectral state. In addition to thermal emission from the neutron star, the burst spectrum…
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NICER Detection of Strong Photospheric Expansion during a Thermonuclear X-Ray Burst from 4U 1820–30
The Astrophysical Journal Letters · 2018-04-01 · 35 citations
articleOpen access
Abstract The Neutron Star Interior Composition Explorer ( NICER ) on the International Space Station (ISS) observed strong photospheric expansion of the neutron star in 4U 1820–30 during a Type I X-ray burst. A thermonuclear helium flash in the star’s envelope powered a burst that reached the Eddington limit. Radiation pressure pushed the photosphere out to ∼200 km, while the blackbody temperature dropped to 0.45 keV. Previous observations of similar bursts were performed with instruments that a…
Publisher OA PDF DOI
The Radius of PSR J0740+6620 from NICER and XMM-Newton Data
2021 · 33 citations
Abstract PSR J0740+6620 has a gravitational mass of 2.08 ± 0.07 M ⊙ , which is the highest reliably determined mass of any neutron star. As a result, a measurement of its radius will provide unique insight into the properties of neutron star core matter at high densities. Here we report a radius measurement based on fits of rotating hot spot patterns to Neutron Star Interior Composition Explorer (NICER) and X-ray Multi-Mirror (XMM-Newton) X-ray observations. We find that the equatorial circumfer…
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Recent grants

Studies in Relativistic Physics and Astrophysics
NSF · $394k · 2001–2007
Studies in Relativistic Physics and Astrophysics
NSF · $383k · 2007–2010

Frequent coauthors

M. Coleman Miller
University of Maryland, College Park
130 shared
Sebastien Guillot
Institut de Recherche en Astrophysique et Planétologie
66 shared
Dimitrios Psaltis
49 shared
M. van der Klis
The Netherlands Cancer Institute
40 shared
Stratos Boutloukos
National Institute for Astrophysics
37 shared
Keith C. Gendreau
34 shared
Paul S. Ray
United States Naval Research Laboratory
33 shared
Zaven Arzoumanian
31 shared

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