Radoslaw Jan Wojtak

Radoslaw Jan Wojtak

Associate Professor

ORCID: 0000-0001-9666-3164

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  1. Published

    A New Measurement of the Hubble Constant and Matter Content of the Universe Using Extragalactic Background Light γ-Ray Attenuation

    Dominguez, A., Wojtak, Radoslaw Jan, Finke, J., Ajello, M., Helgason, K., Prada, F., Desai, A., Paliya, V., Marcotulli, L. & Hartmann, D. H., 10 Nov 2019, In: Astrophysical Journal. 885, 2, 7 p., 137.

    Research output: Contribution to journal › Journal article › Research › peer-review

  2. Published

    A fast-rising tidal disruption event from a candidate intermediate-mass black hole

    Angus, C. R., Baldassare, V. F., Mockler, B., Foley, R. J., Ramirez-Ruiz, E., Raimundo, S., French, K. D., Auchettl, K., Pfister, H., Gall, C., Hjorth, J., Drout, M. R., Alexander, K. D., Dimitriadis, G., Hung, T., Jones, D. O., Rest, A., Siebert, M. R., Taggart, K., Terreran, G. & 19 others, Tinyanont, S., Carroll, C. M., DeMarchi, L., Earl, N., Gagliano, A., Izzo, Luca, Villar, V. A., Zenati, Y., Arendse, N., Cold, C., de Boer, T. J. L., Chambers, K. C., Coulter, D. A., Khetan, Nandita, Lin, C. C., Magnier, E. A., Rojas-Bravo, C., Wainscoat, R. J. & Wojtak, Radoslaw Jan, 10 Nov 2022, In: Nature Astronomy. 6, p. 1452-1463 15 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  3. Published

    A new derivation of the Hubble constant from γ-ray attenuation using improved optical depths for the Fermi and CTA era

    Domínguez, A., Østergaard kirkeberg, P., Wojtak, Radoslaw Jan, Saldana-lopez, A., Desai, A., Primack, J. R., Finke, J., Ajello, M., Pérez-gonzález, P. G., Paliya, V. S. & Hartmann, D., 2 Jan 2024, In: Monthly Notices of the Royal Astronomical Society. 527, 3, p. 4632-4642 11 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  4. Published

    A new measurement of the Hubble constant using Type la supernovae calibrated with surface brightness fluctuations

    Khetan, N., Izzo, Luca, Branchesi, M., Wojtak, Radoslaw Jan, Cantiello, M., Murugeshan, C., Agnello, Adriano, Cappellaro, E., Della Valle, M., Gall, Christa, Hjorth, Jens, Benetti, S., Brocato, E., Burke, J., Hiramatsu, D., Howell, D. A., Tomasella, L. & Valenti, S., 12 Mar 2021, In: Astronomy & Astrophysics. 647, 20 p., A72.

    Research output: Contribution to journal › Journal article › Research › peer-review

  5. Published

    A new method to measure the mass of galaxy clusters

    Falco, M., Hansen, Steen Harle, Wojtak, Radoslaw Jan, Brinckmann, T., Lindholmer, M. & Pandolfi, S., 1 Aug 2014, In: Monthly Notices of the Royal Astronomical Society. 442, 2, p. 1887-1896

    Research output: Contribution to journal › Journal article › Research › peer-review

  6. Published

    AI-driven spatio-temporal engine for finding gravitationally lensed type Ia supernovae

    Kodi Ramanah, D., Arendse, N. & Wojtak, Radoslaw Jan, 14 Apr 2022, In: Monthly Notices of the Royal Astronomical Society. 512, 4, p. 5404-5417 14 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  7. Published

    Anisotropic q-Gaussian 3D velocity distributions in Lambda CDM haloes

    Silva, L. B. E., Mamon, G. A., Duarte, M., Wojtak, Radoslaw Jan, Peirani, S. & Boue, G., 1 Sep 2015, In: Monthly Notices of the Royal Astronomical Society. 452, 1, p. 944-955

    Research output: Contribution to journal › Journal article › Research › peer-review

  8. Published

    Comparing fully general relativistic and Newtonian calculations of structure formation

    East, W. E., Wojtak, Radoslaw Jan & Abel, T., 13 Feb 2018, In: Physical Review D. 97, 4, 15 p., 043509.

    Research output: Contribution to journal › Journal article › Research › peer-review

  9. Published

    Cosmic dissonance: are new physics or systematics behind a short sound horizon?

    Arendse, N., Wojtak, Radoslaw Jan, Agnello, Adriano, Chen, G. C., Fassnacht, C. D., Sluse, D., Hilbert, S., Millon, M., Bonvin, V., Wong, K. C., Courbin, F., Suyu, S. H., Birrer, S., Treu, T. & Koopmans, L. V. E., 7 Jul 2020, In: Astronomy & Astrophysics. 639, 13 p., A57.

    Research output: Contribution to journal › Journal article › Research › peer-review

  10. Published

    Cosmic variance of the local Hubble flow in large-scale cosmological simulations

    Wojtak, Radoslaw Jan, Knebe, A., Watson, W. A., Iliev, I. T., Hess, S., Rapetti, D., Yepes, G. & Gottloeber, S., 1 Feb 2014, In: Monthly Notices of the Royal Astronomical Society. 438, 2, p. 1805-1812

    Research output: Contribution to journal › Journal article › Research › peer-review

  11. Published

    Cosmological Parameters from Supernovae Associated with Gamma-Ray Bursts

    Li, X., Hjorth, Jens & Wojtak, Radoslaw Jan, 20 Nov 2014, In: Astrophysics Journal Letters. 796, 1, 4 p., L4.

    Research output: Contribution to journal › Journal article › Research › peer-review

  12. Published

    Dynamical mass inference of galaxy clusters with neural flows

    Ramanah, D. K., Wojtak, Radoslaw Jan, Ansari, Z., Gall, Christa & Hjorth, Jens, 21 Sep 2020, In: Monthly Notices of the Royal Astronomical Society. 499, 2, p. 1985-1997 13 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  13. Published

    Dynamical signatures of infall around galaxy clusters: a generalized Jeans equation

    Falco, M., Mamon, G. A., Wojtak, Radoslaw Jan, Hansen, Steen Harle & Gottloeber, S., 1 Dec 2013, In: Monthly Notices of the Royal Astronomical Society. 436, 3, p. 2639-2649

    Research output: Contribution to journal › Journal article › Research › peer-review

  14. Published

    Effect of asphericity in caustic mass estimates of galaxy clusters

    Svensmark, Jacob, Wojtak, Radoslaw Jan & Hansen, Steen Harle, 1 Apr 2015, In: Monthly Notices of the Royal Astronomical Society. 448, 2, p. 1644-1659

    Research output: Contribution to journal › Journal article › Research › peer-review

  15. Published

    Einstein-Vlasov calculations of structure formation

    East, W. E., Wojtak, Radoslaw Jan & Pretorius, F., 27 Nov 2019, In: Physical Review D. 100, 10, 10 p., 103533.

    Research output: Contribution to journal › Journal article › Research › peer-review

  16. Published

    Erratum: Anisotropic q-Gaussian 3D velocity distributions in ACDM haloes

    Beraldo e Silva, L., Mamon, G. A., Duarte, M., Wojtak, Radoslaw Jan, Peirani, S. & Boue, G., 1 Feb 2017, In: Monthly Notices of the Royal Astronomical Society. 467, 2, p. 2445-2445

    Research output: Contribution to journal › Journal article › Research › peer-review

  17. Published

    Galaxy Cluste Mass Reconstruction Project - III. The impact of dynamical substructure on cluster mass estimates

    Old, L., Wojtak, Radoslaw Jan, Pearce, F. R., Gray, M. E., Mamon, G. A., Sifon, C., Tempel, E., Biviano, A., Yee, H. K. C., de Carvalho, R., Mueller, V., Sepp, T., Skibba, R. A., Croton, D., Bamford, S. P., Power, C., von der Linden, A. & Saro, A., 21 Mar 2018, In: Monthly Notices of the Royal Astronomical Society. 475, 1, p. 853-866

    Research output: Contribution to journal › Journal article › Research › peer-review

  18. Published

    Galaxy Cluster Mass Reconstruction Project - II. Quantifying scatter and bias using contrasting mock catalogues

    Old, L., Wojtak, R., Mamon, G. A., Skibba, R. A., Pearce, F. R., Croton, D., Bamford, S., Behroozi, P., de Carvalho, R., Munoz-Cuartas, J. C., Gifford, D., Gray, M. E., von der Linden, A., Merrifield, M. R., Muldrew, S. I., Mueller, V., Pearson, R. J., Ponman, T. J., Rozo, E., Rykoff, E. & 4 others, Saro, A., Sepp, T., Sifon, C. & Tempel, E., 11 May 2015, In: Monthly Notices of the Royal Astronomical Society. 449, 2, p. 1897-1920

    Research output: Contribution to journal › Journal article › Research › peer-review

  19. Published

    Galaxy Cluster Mass Reconstruction Project - IV. Understanding the effects of imperfect membership on cluster mass estimation

    Wojtak, Radoslaw Jan, Old, L., Mamon, G. A., Pearce, F. R., de Carvalho, R., Sifon, C., Gray, M. E., Skibba, R. A., Croton, D., Bamford, S., Gifford, D., von der Linden, A., Munoz-Cuartas, J. C., Mueller, V., Pearson, R. J., Rozo, E., Rykoff, E., Saro, A., Sepp, T. & Tempel, E., 2 Nov 2018, In: Monthly Notices of the Royal Astronomical Society. 481, 1, p. 324-340 17 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  20. Published

    Galaxy cluster mass reconstruction project - I. Methods and first results on galaxy-based techniques

    Old, L., Skibba, R. A., Pearce, F. R., Croton, D., Muldrew, S. I., Munoz-Cuartas, J. C., Gifford, D., Gray, M. E., von der Linden, A., Mamon, G. A., Merrifield, M. R., Mueller, V., Pearson, R. J., Ponman, T. J., Saro, A., Sepp, T., Sifon, C., Tempel, E., Tundo, E., Wang, Y. O. & 1 others, Wojtak, Radoslaw Jan, Jun 2014, In: Monthly Notices of the Royal Astronomical Society. 441, 2, p. 1513-1536

    Research output: Contribution to journal › Journal article › Research › peer-review

  21. Published

    Intrinsic tension in the supernova sector of the local Hubble constant measurement and its implications

    Wojtak, Radoslaw Jan & Hjorth, Jens, 2 Aug 2022, In: Monthly Notices of the Royal Astronomical Society. 515, 2, p. 2790-2799 10 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  22. Published

    LensWatch. I. Resolved HST Observations and Constraints on the Strongly Lensed Type Ia Supernova 2022qmx (“SN Zwicky”)

    Pierel, J. D. R., Arendse, N., Ertl, S., Huang, X., Moustakas, L. A., Schuldt, S., Shajib, A. J., Shu, Y., Birrer, S., Bronikowski, M., Hjorth, J., Suyu, S. H., Agarwal, S., Agnello, A., Bolton, A. S., Chakrabarti, S., Cold, C., Courbin, F., Della Costa, J. M., Dhawan, S. & 25 others, Engesser, M., Fox, O. D., Gall, Christa, Gomez, S., Goobar, A., Jha, S. W., Jimenez, C., Johansson, J., Larison, C., Li, G., Marques-chaves, R., Mao, S., Mazzali, P. A., Perez-fournon, I., Petrushevska, T., Poidevin, F., Rest, A., Sheu, W., Shirley, R., Silver, E., Storfer, C., Strolger, L. G., Treu, T., Wojtak, Radoslaw Jan & Zenati, Y., 15 May 2023, In: Astrophysical Journal. 948, 2, 23 p., 115.

    Research output: Contribution to journal › Journal article › Research › peer-review

  23. Published

    Local gravitational redshifts can bias cosmological measurements

    Wojtak, Radoslaw Jan, Davis, T. M. & Wiis, J. N., 1 Jul 2015, In: Journal of Cosmology and Astroparticle Physics. 2015, 7, 025.

    Research output: Contribution to journal › Journal article › Research › peer-review

  24. Published

    Low-redshift measurement of the sound horizon through gravitational time-delays

    Arendse, N., Agnello, Adriano & Wojtak, Radoslaw Jan, 9 Dec 2019, In: Astronomy & Astrophysics. 632, 6 p., A91.

    Research output: Contribution to journal › Journal article › Research › peer-review

  25. Published

    Magnified or multiply imaged? - Search strategies for gravitationally lensed supernovae in wide-field surveys

    Wojtak, Radoslaw Jan, Hjorth, Jens & Gall, Christa, 1 Aug 2019, In: Monthly Notice of the Royal Astronomical Society. 487, 3, p. 3342-3355 13 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

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