Refereed papers

  1. Kaplan, J., Willems, B., 2008, Asymptotic approximations of low-frequency gravity modes in stars with a convective core and a radiative envelope, submitted to Monthly Notices of the Royal Astronomical Society

  2. Davis, P., Kolb, U., Willems, B., Gaensicke, B., 2008, How Many CVs are Crossing the Period Gap? A Test for the Disruption of Magnetic Braking, submitted to Monthly Notices of the Royal Astronomical Society

  3. Willems, B., Vecchio, A., Kalogera, V., 2008, Probing white dwarf interiors with LISA: periastron precession in eccentric double white dwarfs, Physical Review Letters, 100, 041102, 4 pages

  4. Sepinsky, J.F., Willems, B., Kalogera, V., Rasio, F., 2007, Interacting binaries with eccentric orbits. I. Secular orbital evolution due to conservative mass transfer, The Astrophysical Journal, 667, p. 1170, 15 pages

  5. Willems, B., Kalogera, V., Vecchio, A., Ivanova, N., Rasio, F.A., Fregeau, J.M., Belczynski, K., 2007, Eccentric double white dwarfs as LISA sources in globular clusters, The Astrophysical Journal Letters, 665, p. L59, 4 pages

  6. Sepinsky, J.F., Willems, B., Kalogera, V., 2007, Equipotential surfaces and Lagrangian points in eccentric binary and planetary systems, The Astrophysical Journal, 660, p. 1624, 12 pages

  7. Willems, B., Taam, R.E., Kolb, U., Dubus, G., Sandquist, E.L., 2007, Theoretical orbital period distributions of cataclysmic variables above the period gap: effects of circumbinary disks, The Astrophysical Journal, 657, p. 465, 17 pages

  8. Willems, B., Kaplan, J., Kalogera, V., Fragos, T., Belczynski, K., 2006, Formation and progenitor of PSR J0737-3039: New constraints on the supernova explosion forming pulsar B, Physical Review D, 74, 043003, 21 pages

  9. Willems, B., Kolb, U., Justham, S., 2006, Eclipsing binaries in extrasolar planet surveys: the case of SuperWASP, Monthly Notices of the Royal Astronomical Society, 367, p. 1103, 10 pages

  10. Willems, B., Kolb, U., Sandquist, E.L., Taam, R.E., Dubus, G., 2005, Angular momentum losses and the orbital period distribution of cataclysmic variables below the period gap: effects of circumbinary disks, The Astrophysical Journal, 635, p. 1263, 18 pages

  11. Willems, B., Henninger, M., Levin, T., Ivanova, N., Kalogera, V., McGhee, K., Timmes, F.X., Fryer, C.L., 2005, Understanding compact object formation and natal kicks I. Calculation methods and the case of GROJ1655-40, The Astrophysical Journal, 625, p. 324, 23 pages

  12. Faber, J.A., Rasio, F.A., Willems, B., 2005, Tidal interactions and disruptions of giant planets on highly eccentric orbits, Icarus, 175, p. 248, 15 pages

  13. Willems, B., Kalogera, V., Henninger, M., 2004, Pulsar kicks and spin tilts in the close double neutron stars PSRJ0737-3039, PSRB1534+12 and PSRB1913+16, The Astrophysical Journal, 616, p. 414, 25 pages

  14. Uytterhoeven, K., Willems, B., Lefever, K., Aerts, C., Telting, J.H., Kolb, U., 2004, Interpretation of the variability of the β Cephei star λ Scorpii I. The multiple character, Astronomy and Astrophysics, 427, p. 581, 14 pages

  15. Uytterhoeven, K., Telting, J.H., Aerts, C., Willems, B., 2004, Interpretation of the variability of the β Cephei star λ Scorpii II. The line-profile diagnostics, Astronomy and Astrophysics, 427, p. 593, 13 pages

  16. Willems, B., Kolb, U., 2004, Detached white dwarf main-sequence star binaries, Astronomy and Astrophysics, 419, p. 1057, 20 pages

  17. Willems, B., Kalogera, V., 2004, Constraints on the formation of PSRJ0737-3039: the most probable isotropic kick magnitude, The Astrophysical Journal Letters, 603, p. L101, 4 pages

  18. Willems, B., 2003, Excitation of oscillation modes by tides in close binaries: constraints on stellar and orbital parameters, Monthly Notices of the Royal Astronomical Society, 346, p. 968, 9 pages

  19. Claret, A., Willems, B., 2003, Rotating stellar models and dynamic tides in close binaries: a first approach, Astronomy and Astrophysics, 410, p. 289, 9 pages

  20. Willems, B., Kolb, U., 2003, On the detection of pre-low-mass X-ray binaries, Monthly Notices of the Royal Astronomical Society, 343, p. 949, 10 pages

  21. Quaintrell, H., Norton, A.J., Ash, T.D.C., Roche, P., Willems, B., Bedding, T., Baldry, I., Fender, R.P., 2003, The mass of the neutron star in Vela X-1 and tidally induced non-radial oscillations in GPVel, Astronomy and Astrophysics, 401, p. 313, 11 pages

  22. Willems, B., Claret, A., 2003, The effect of stellar compressibility and non-resonant dynamic tides on the apsidal-motion rate in close binaries, Astronomy and Astrophysics, 398, p. 1111, 5 pages

  23. Willems, B., Van Hoolst, T., Smeyers, P., 2003, Nonadiabatic resonant dynamic tides and orbital evolution in close binaries, Astronomy and Astrophysics, 397, p. 973, 13 pages

  24. Willems, B., Kolb, U., 2002, Population synthesis of wide binary millisecond pulsars, Monthly Notices of the Royal Astronomical Society, 337, p. 1004, 13 pages

  25. Claret, A., Willems, B., 2002, New results on the apsidal-motion test to stellar structure and evolution including the effects of dynamic tides, Astronomy and Astrophysics, 388, p. 518, 13 pages

  26. Handler, G., Balona, L.A., Shobbrook, R.R., Koen, C., Bruch, A., Romero-Colmenero, E., Pamyatnykh, A.A., Willems, B., Eyer, L., James, D.J., Maas, T., 2002, Discovery and analysis of p-mode and g-mode oscillations in the A-type primary of the eccentric binary HD 209295, Monthly Notices of the Royal Astronomical Society, 333, p. 262, 17 pages

  27. Willems, B., Aerts, C., 2002, Tidally induced radial-velocity variations in close binaries, Astronomy and Astrophysics, 384, p. 441, 11 pages

  28. Willems, B., Claret, A., 2002, The influence of dynamic tides on the apsidal-motion rate in close binaries with an evolved main-sequence star, Astronomy and Astrophysics, 382, p. 1009, 7 pages

  29. Smeyers, P., Willems, B., 2001, On the apsidal motion in close binaries due to the tidal deformations of the components, Astronomy and Astrophysics, 373, p. 173, 8 pages

  30. Smeyers, P., Willems, B., 1998, The asymptotic representation of dynamic tides in close binaries revisited, Astronomy and Astrophysics, 336, p. 539, 6 pages

  31. Smeyers, P., Willems, B., Van Hoolst, T., 1998, Resonant dynamic tides and apsidal motion in close binaries, Astronomy and Astrophysics, 335, p. 622, 15 pages

  32. Willems, B., Van Hoolst, T., Smeyers, P., 1997, Effects of gravity and density stratification on the asymptotic representation of p-modes in stars, Astronomy and Astrophysics, 326, p. 1055, 11 pages

  33. Willems, B., Van Hoolst, T., Smeyers, P., Waelkens, C., 1997, On the possibility of a tidally excited low-frequency g+-mode in 51 Peg, Astronomy and Astrophysics, 326, p. L37, 4 pages

  34. Willems, B., Van Hoolst, T., Smeyers, P., 1997, Asymptotic representation of nonradial g+-modes in stars with a convective core, Astronomy and Astrophysics, 318, p. 99, 9 pages

Invited book chapters

  1. Kalogera, V., Belczynski, K., Kim, C., O'Shaughnessy, R., Willems, B., 2006, Formation of double compact objects, Physics Reports, 442, p. 75, 34 pages

  2. Claret, A., Willems, B., Giménez, A., 2003, Unveiling the internal constitution of components of close binaries, Recent Research Developments in Astronomy and Astrophysics, 1, p. 375, 31 pages

Conference proceedings papers

  1. Fragos, T., Kalogera, V., Willems, B., Ivanova, N., 2008, Black Hole Formation: Progenitors and Kicks, American Astronomical Society, HEAD Meeting Abstracts, 10, 14.02 (contributed talk presented by T. Fragos)

  2. Willems, B., Andrews, J., Kalogera, V., Belczynski, K., 2007, Polar kicks and the Pspin-e relation in double neutron stars, in 40 Years of Pulsars - Millisecond Pulsars, Magnetars and More, eds. Bassa et al., AIP Conference Proceedings, 983, 464, 5 pages(contributed talk)

  3. Kalogera, V., Valsecchi, F., Willems, B., 2007, Neutron stars: formed, spun and kicked, in 40 Years of Pulsars - Millisecond Pulsars, Magnetars and More, eds. Bassa et al., AIP Conference Proceedings, 983, 433, 9 pages (contributed talk presented by V. Kalogera)

  4. Sepinsky, J.F., Willems, B., Kalogera, V., Rasio, F.A., 2007, American Astronomical Society Meeting Abstracts, 211, 151.07 (contributed talk presented by J. Sepinsky)

  5. Fragos, T., Willems, B., Kalogera, V., 2007, Understanding black hole formation and natal kicks: The case of XTE J1118+480, in The Multicoloured Landscape of Compact Objects and their Explosive Progenitors: Theory vs Observations, eds. Di Salvo et al., AIP Conference Proceedings, 924, p. 673, 6 pages (contributed talk presented by T. Fragos)

  6. Kaplan, J., Willems, B., Kalogera, V., 2007, American Astronomical Society Meeting Abstracts, 210, 45.06 (contributed talk presented by J. Kaplan)

  7. Willems, B., 2007, Dynamic tides in close binaries, in Active OB-Stars: Laboratories for Stellar and Circumstellar Physics, eds. S. Stefl, S. Owocki and A. Okazaki, Astronomical Society of the Pacific Conference Series, 361, p. 124, 12 pages (invited review)

  8. Sepinsky, J.F., Willems, B. Kalogera, V., 2006, American Astronomical Society Meeting Abstracts, 209, 230.01 (contributed talk presented by J. Sepinsky)

  9. Willems, B., Kalogera, V., Vecchio, A., Ivanova, N., Deloye, C., Hansen, B., 2006, American Astronomical Society Meeting Abstracts, 209, 74.12 (poster)

  10. Willems, B., Fragos, T., Kalogera, V., 2006, American Astronomical Society Meeting Abstracts, 209, 36.03 (contributed talk)

  11. Kalogera, V., Willems, B., Henninger, M., Levin, T., Ivanova, N., 2005, Black hole formation in X-ray binaries: the case of GRO J1655-40, in Interacting binaries: accretion, evolution and outcomes, eds. L. Burderi, L. A. Antonelli, F. D'Antona, T. Di Salvo, G. Luca Israel, A. Tornambè, and O. Straniero, AIP Conference Proceedings, 797, p. 241, 8 pages (invited talk presented by V. Kalogera)

  12. Willems, B., Claret, A., 2005, Dynamic tides and the evolution of stars in close binaries, in Third Granada Workshop on Stellar Structure: Tidal Evolution and Oscillations in Binary Stars, eds. A. Claret, A. Giménez, and J.-P. Zahn, ASP Conference Series, 333, p. 52, 10 pages (invited talk)

  13. Kolb, U., Willems, B., 2005, Thermal-timescale mass transfer and evolved donor stars in CVs, in The Astrophysics of Cataclysmic Variables and Related Objects, eds. J.-M. Hameury and J.-P. Lasota, Astronomical Society of the Pacific Conference Series, 330, p. 17, 10 pages (invited talk presented by U. Kolb)

  14. Willems, B., Kalogera, V., Henninger, M., 2005, The formation of the most relativistic pulsar PSRJ0737-3039, in Binary Radio Pulsars, proceedings of an Aspen Winter Conference, eds. F. Rasio and I. Stairs, Astronomical Society of the Pacific Conference Series, 328, p. 123, 6 pages (invited talk)

  15. Willems, B., Kolb, U., 2005, The orbital period distribution of wide binary millisecond pulsars, in Binary Radio Pulsars, proceedings of an Aspen Winter Conference, eds. F. Rasio and I. Stairs, Astronomical Society of the Pacific Conference Series, 328, p. 255, 5 pages (invited talk)

  16. Kolb, U., Willems, B., 2004, Population synthesis studies of white dwarf binaries, in IAU Colloquium 194, Compact Binaries in the Galaxy and Beyond, eds. G. Tovmassian and E. Sion, Revista Mexicana de Astronomia y Astrofisica Conference Series, 20, p. 101, 3 pages (invited talk presented by U. Kolb)

  17. Fontaine, G., Brassard, P., Charpinet, S., Green, E.M., Willems, B., 2003, On the potential of tidal excitation of gravity modes in hot B subdwarfs, in Asteroseismology Across the HR Diagram, eds. M.J. Thompson, M.S. Cunha, and M.J.P.F.G. Monteiro, 4 pages (poster)

  18. Willems, B., Kolb, U., 2003, The Population of Wide Binary Millisecond Pulsars, in X-ray Surveys in the light of the new observatories, Astronomische Nachrichten, 324, p. 169, 1 page (poster)

  19. Willems, B., Mundin, R.P., Kolb, U., 2002, BiSEPS: A new Binary Population Synthesis Code, in The Physics of Cataclysmic Variables and Related Objects, eds. B.T. Gänsicke, K. Beuermann, and K. Reinsch, ASP Conference Series, 261, p. 303, 2 pages (poster)

  20. Willems, B., Aerts, C., 2002, Tidally induced oscillations in close binaries, in IAU Colloquium 185, Radial and Nonradial Pulsations as Probes of Stellar Physics, eds. C. Aerts, T.R. Bedding, and J. Christensen-Dalsgaard, ASP Conference Series, 259, p. 76, 4 pages (contributed talk)

  21. Handler, G., Balona, L.A., Shobbrook, R.R., Koen, C., Bruch, A., Romero-Colmenero, E., Pamyatnykh, A.A., Willems, B., Eyer, L., James, D.J., Maas, T., Crause, L.A., 2002, Asteroseismology and forced oscillations of HD 209295, the first member of two classes of pulsating star, in IAU Colloquium 185, Radial and Nonradial Pulsations as Probes of Stellar Physics, eds. C. Aerts, T.R. Bedding, and J. Christensen-Dalsgaard, ASP Conference Series, 259, p. 90, 4 pages (contributed talk presented by G. Handler)

  22. Willems, B., 2001, Resonant tides in close binaries, in The influence of binaries on stellar population studies, ed. D. Vanbeveren, Astrophysics and Space Science Library, Volume 264, p. 565, 2 pages (poster)

  23. Willems, B., Van Hoolst, T., Smeyers, P., 1998, Asymptotic theory of p-modes modified for effects of gravity, in IAU Symposium No. 181, Sounding Solar and Stellar Interiors, Poster Volume, eds. J. Provost and F.X. Schmider, p. 137, 2 pages (poster)

  24. Van Hoolst, T., Willems, B., Smeyers, P., 1998, The asymptotic representation of p-modes modified for the effects of gravity and density stratification, in A Half Century of Stellar Pulsation Interpretations: A Tribute to Arthur N. Cox, eds. Paul A. Bradley and Joyce A. Guzik, ASP Conference Series, 135, p. 87, 2 pages (poster)

  25. Smeyers, P., Willems, B., Van Hoolst, T., 1998, Resonant dynamic tides and apsidal motion in close binaries, 53rd Dutch Astronomer's Conference (poster, only available as abstract)

Dissertations

  1. Willems, B., 2000, Contribution to the linear theory of dynamic tides and orbital evolution in close binaries, Ph.D. Thesis, Katholieke Universiteit Leuven, Belgium

  2. Willems, B., 1995, Asymptotic representation of g+-modes in stars (in Dutch), Licentiate's Thesis, Katholieke Universiteit Leuven, Belgium

Unpublished talks and seminars

  1. The Past, Present, and Future of Recycled Pulsar Binaries, Invited Talk, Neutron Star Populations Workshop at Green Bank Observatory, May 21, 2007

  2. The Formation and Progenitor of the Double Pulsar PSR J0737-3039, Institute for Theory and Computation Colloquium Colloquium, Harvard-Smithsonian Center for Astrophysics, February 22, 2007

  3. Black Hole X-Ray Binary Forensics, Research talk for undergraduate and graduate students at Lehigh University, February 16, 2007

  4. Cataclysmic Binaries with Circumbinary Disks, Physics and Astronomy Colloquium at Lehigh University, February 15, 2007

  5. Cataclysmic Binaries with Circumbinary Disks, Physics and Astronomy Colloquium at San Francisco State University, February 12, 2007

  6. Tidal Effects in Close Double White Dwarfs, Contributed Talk, Aspen Summer Workshop on LISA Data: Analysis, Sources and Science, June 15, 2005

  7. Pulsar Kicks and Spin Tilts in Close Double Neutron Stars, Physics & Astronomy Colloquium, The Open University, May 18, 2004

  8. PSRJ0737-3039: An Extraordinary Double Neutron Star System, Physics and Astronomy Bag Lunch seminar, Northwestern University, April 14, 2004

  9. Wide binary millisecond pulsars, Theoretical Astrophysics Group Meeting, Northwestern University, October 23, 2003

  10. Modelling of wide binary millisecond pulsars, Postdoc Interview, Catholic University of Leuven, October 14, 2002

  11. Stellar oscillations, part I-VI, Postgraduate Training Seminar Series, The Open University, June/July 2002

  12. Forced oscillations in close binaries, Invited Seminar, University College London, January 21, 2002

  13. Tidal effects in close binaries, Lunchtime Talk, The Open University, October 5, 2001

  14. Resonant dynamic tides and orbital evolution in close binaries, Postdoc Interview, The Open University, May 19, 2000