Dr. Alexander Y. Potekhin
'%3e%3cpath%20d='M22.1642%2019.0924C21.7317%2018.068%2021.1041%2017.1375%2020.3163%2016.3527C19.5309%2015.5656%2018.6006%2014.9381%2017.5766%2014.5048C17.5674%2014.5002%2017.5582%2014.4979%2017.5491%2014.4933C18.9774%2013.4616%2019.9059%2011.7811%2019.9059%209.88504C19.9059%206.74408%2017.3611%204.19922%2014.2201%204.19922C11.0792%204.19922%208.53429%206.74408%208.53429%209.88504C8.53429%2011.7811%209.46282%2013.4616%2010.8912%2014.4956C10.882%2014.5002%2010.8728%2014.5025%2010.8636%2014.5071C9.83652%2014.9404%208.91487%2015.5617%208.1239%2016.355C7.33685%2017.1404%206.70933%2018.0707%206.276%2019.0947C5.85031%2020.0972%205.62072%2021.172%205.59967%2022.2609C5.59905%2022.2853%205.60335%2022.3097%205.61229%2022.3325C5.62123%2022.3553%205.63465%2022.376%205.65174%2022.3935C5.66883%2022.4111%205.68926%2022.425%205.71182%2022.4345C5.73437%2022.444%205.7586%2022.4489%205.78308%2022.4489H7.15868C7.25956%2022.4489%207.3398%2022.3686%207.3421%2022.2701C7.38795%2020.5001%208.09868%2018.8425%209.35506%2017.5861C10.655%2016.2862%2012.3814%2015.5709%2014.2201%2015.5709C16.0588%2015.5709%2017.7852%2016.2862%2019.0852%2017.5861C20.3415%2018.8425%2021.0523%2020.5001%2021.0981%2022.2701C21.1004%2022.3709%2021.1807%2022.4489%2021.2815%2022.4489H22.6571C22.6816%2022.4489%2022.7058%2022.444%2022.7284%2022.4345C22.751%2022.425%2022.7714%2022.4111%2022.7885%2022.3935C22.8056%2022.376%2022.819%2022.3553%2022.8279%2022.3325C22.8369%2022.3097%2022.8412%2022.2853%2022.8406%2022.2609C22.8176%2021.165%2022.5907%2020.0989%2022.1642%2019.0924ZM14.2201%2013.8284C13.1678%2013.8284%2012.1773%2013.418%2011.4322%2012.6729C10.6871%2011.9278%2010.2767%2010.9374%2010.2767%209.88504C10.2767%208.83271%2010.6871%207.84227%2011.4322%207.09715C12.1773%206.35204%2013.1678%205.94165%2014.2201%205.94165C15.2724%205.94165%2016.2629%206.35204%2017.008%207.09715C17.7531%207.84227%2018.1635%208.83271%2018.1635%209.88504C18.1635%2010.9374%2017.7531%2011.9278%2017.008%2012.6729C16.2629%2013.418%2015.2724%2013.8284%2014.2201%2013.8284Z'%20fill='%238590A2'/%3e%3c/g%3e%3c/svg%3e)
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Academic Career Length
40Years (1987-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
View All Publications1 June 2007 in The Astrophysical Journal
Journal Article
SCS. Cassisi
S. CassisiAlexander Y. PotekhinAPA. Pietrinferni
A. PietrinferniMCM. Catelan
M. CatelanMSM. Salaris
M. SalarisWe review the theory of electron-conduction opacity, a fundamental ingredient in the computation of low-mass stellar models; shortcomings and limitations of the existing calculations used in stellar evolution are discussed. We then present new determinations of the electron-conduction opacity in stellar conditions for an arbitrary chemical composition, that improve over previous works and, most importantly, cover the whole parameter space relevant to stellar evolution models (i.e., both the regime of partial and high electron degeneracy). A detailed comparison with the currently used tabulations is also performed. The impact of our new opacities on the evolution of low-mass stars is assessed by computing stellar models along both the H- and He-burning evolutionary phases, as well as Main Sequence models of very low-mass stars and white dwarf cooling tracks.Comment: 11 pages, 6 figures, ApJ in pres
18 July 2015 in Space Science Reviews
Journal Article
3 December 2013 in Astronomy & Astrophysics
Journal Article
Alexander Y. PotekhinAFA. F. Fantina
A. F. Fantina
Nicolas ChamelJPJ. M. Pearson
J. M. Pearson
SGS. Goriely
S. Goriely
Astronomy & Astrophysics (A&A) is an international journal which publishes papers on all aspects of astronomy and astrophysics
28 January 2010 in Contributions to Plasma Physics
Journal Article
Alexander Y. PotekhinGCG. Chabrier
G. Chabrier
4 September 2018 in Monthly Notices of the Royal Astronomical Society
Journal Article
JPJ M Pearson
J M Pearson
Nicolas ChamelAlexander Y. PotekhinAFA F Fantina
A F FantinaCDC Ducoin
C Ducoin
SGS Goriely
S Goriely
+1
The theory of the nuclear energy-density functional is used to provide a unified and thermodynamically consistent treatment of all regions of cold non-accreting neutron stars. In order to assess the impact of our lack of complete knowledge of the density dependence of the symmetry energy on the constitution and the global structure of neutron stars, we employ four different functionals. All of them were precision fitted to essentially all the nuclear mass data with the Hartree–Fock–Bogoliubov method and two different neutron-matter equations of state based on realistic nuclear forces. For each functional, we calculate the composition, the pressure–density relation, and the chemical potentials throughout the star. We show that uncertainties in the symmetry energy can significantly affect the theoretical results for the composition and global structure of neutron stars. To facilitate astrophysical applications, we construct analytic fits to our numerical results.
21 June 2001 in Monthly Notices of the Royal Astronomical Society
Journal Article
OGOleg Y. Gnedin
Oleg Y. GnedinDYDmitry G. Yakovlev
Dmitry G. Yakovlev
Alexander Y. PotekhinThe internal properties of the neutron star crust can be probed by observing the epoch of thermal relaxation. After the supernova explosion, powerful
About Me
Born on November 5, 1961 in Leningrad (now Saint Petersburg), Russia. Graduated in 1985 from the Leningrad State University (Faculty of Physics, Department of The Theory of Nucleus and Elementary Particles). In 1985-1992 worked at the S.I.Vaviov State Optical institute in Leningrad on the theory of radiative transfer in stochastic media (PhD in 1991). The principal affiliation since 1992 - Ioffe Institute in Saint Petersburg. The main field of activity since 1991 - studies of neutron stars and properties of their matter, including: atomic structure and radiative transitions in strong magnetic fields; equation of state and kinetic properties of dense, strongly coupled plasmas (with or without strong magnetic fields); equation of state, transport properties, thermal spectra and thermal evolution of compact stars. Over 200 scientific publications, which have got over eight thousand citations (h=50), and participation in 40+ scientific conferences on neutron star physics, optics, atomic and statistical physics, plasma physics and cosmology. Coauthor (with P. Haensel and D.G. Yakovlev) of the monograph: Neutron Stars 1: Equation of State and Structure (New York: Springer, 2007).