Radoslaw Jan Wojtak
Associate Professor
DARK
Jagtvej 155A
2200 København N
- 2024
- 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
- 2023
- Published
The Young Supernova Experiment Data Release 1 (YSE DR1): Light Curves and Photometric Classification of 1975 Supernovae
Aleo, P. D., Malanchev, K., Sharief, S., Jones, D. O., Narayan, G., Foley, R. J., Villar, V. A., Angus, C. R., Baldassare, V. F., Bustamante-Rosell, M. J., Chatterjee, D., Cold, C., Coulter, D. A., Davis, K. W., Dhawan, S., Drout, M. R., Engel, A., French, K. D., Gagliano, A., Gall, C. & 67 others, , 1 May 2023, In: Astrophysical Journal, Supplement Series. 266, 1, 46 p., 9.Research output: Contribution to journal › Journal article › Research › peer-review
- 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, , 15 May 2023, In: Astrophysical Journal. 948, 2, 23 p., 115.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Measuring the Hubble constant with kilonovae using the expanding photosphere method
Sneppen, Albert Bjerregård, Watson, Darach Jafar, Poznanski, D., Just, O., Bauswein, A. & Wojtak, Radoslaw Jan, 2 Oct 2023, In: Astronomy & Astrophysics. 678, 13 p., A14.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Relative Intrinsic Scatter in Hierarchical Type Ia Supernova Sibling Analyses: Application to SNe 2021hpr, 1997bq, and 2008fv in NGC 3147
Ward, S. M., Thorp, S., Mandel, K. S., Dhawan, S., Jones, D. O., Taggart, K., Foley, R. J., Narayan, G., Chambers, K. C., Coulter, D. A., Davis, K. W., De Boer, T., De Soto, K., Earl, N., Gagliano, A., Gao, H., Hjorth, J., Huber, M. E., Izzo, L., Langeroodi, D. & 5 others, , 13 Oct 2023, In: Astrophysical Journal. 956, 2, 17 p., 111.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Two-population Bayesian hierarchical model of Type Ia supernovae
Wojtak, Radoslaw Jan, Hjorth, Jens & Hjortlund, Jacob Osman, 11 Sep 2023, In: Monthly Notices of the Royal Astronomical Society. 525, 4, p. 5187-5203 17 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 2022
- 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, , 10 Nov 2022, In: Nature Astronomy. 6, p. 1452-1463 15 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 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
- 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
- 2021
- Published
The Young Supernova Experiment: Survey Goals, Overview, and Operations
Jones, D. O., Foley, R. J., Narayan, G., Hjorth, J., Huber, M. E., Aleo, P. D., Alexander, K. D., Angus, C. R., Auchettl, K., Baldassare, V. F., Bruun, S. H., Chambers, K. C., Chatterjee, D., Coppejans, D. L., Coulter, D. A., DeMarchi, L., Dimitriadis, G., Drout, M. R., Engel, A., French, K. D. & 51 others, , Feb 2021, In: Astrophysical Journal. 908, 2, 24 p., 143.Research output: Contribution to journal › Journal article › Research › peer-review
- 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
- Published
Simulation-based inference of dynamical galaxy cluster masses with 3D convolutional neural networks
Ramanah, D. K., Wojtak, Radoslaw Jan & Arendse, N., 1 Mar 2021, In: Monthly Notices of the Royal Astronomical Society. 501, 3, p. 4080-4091 12 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 2020
- 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
- Published
Pan-STARRS1 Transient Discovery Report for 2020-01-08
Jones, D. O., French, K. D., Agnello, A., Angus, C. R., Ansari, Z., Arendse, N., Gall, C., Grillo, C., Bruun, S. H., Hede, C., Hjorth, J., Izzo, L., Korhonen, H., Raimundo, S., Ramanah, D. K., Sarangi, A., Wojtak, R., Chambers, K. C., Huber, M. E., Magnier, E. A. & 31 others, , 1 Jan 2020, In: Transient Name Server Discovery Report, No. 2020-76. 76Research output: Contribution to journal › Journal article › Research › peer-review
- Published
YSE/Pan-STARRS1 Transient Discovery Report for 2020-01-31
Jones, D. O., French, K. D., Agnello, A., Angus, C. R., Ansari, Z., Arendse, N., Gall, C., Grillo, C., Bruun, S. H., Hede, C., Hjorth, J., Izzo, L., Korhonen, H., Raimundo, S., Ramanah, D. K., Sarangi, A., Wojtak, R., Chambers, K. C., Huber, M. E., Magnier, E. A. & 31 others, , 1 Jan 2020, In: Transient Name Server Discovery Report, No. 2020-76. 341Research output: Contribution to journal › Journal article › Research › peer-review
- 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
- Published
The Lowest of the Low: Discovery of SN 2019gsc and the Nature of Faint Iax Supernovae
Srivastav, S., Smartt, S. J., Leloudas, G., Huber, M. E., Chambers, K., Malesani, D. B., Hjorth, Jens, Gillanders, J. H., Schultz, A., Sim, S. A., Auchettl, K., Fynbo, Johan Peter Uldall, Gall, Christa, McBrien, O. R., Rest, A., Smith, K. W., Wojtak, Radoslaw Jan & Young, D. R., 1 Apr 2020, In: Astrophysical Journal Letters. 892, 2, 8 p., L24.Research output: Contribution to journal › Letter › Research › peer-review
- 2019
- 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
- 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
- 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
- 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
- Published
The Hubble-Lemaitre constant and sound horizon from low-redshift probes
Wojtak, Radoslaw Jan & Agnello, Adriano, 4 Jul 2019, In: Monthly Notices of the Royal Astronomical Society. 486, 4, p. 5046-5051 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 2018
- 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
- 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. 853-866Research output: Contribution to journal › Journal article › Research › peer-review
- 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
- 2017
- 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. 2445-2445Research output: Contribution to journal › Journal article › Research › peer-review
- Published
The Distance to NGC 4993: The Host Galaxy of the Gravitational-wave Event GW170817
Hjorth, Jens, Levan, A. J., Tanvir, N. R., Lyman, J. D., Wojtak, Radoslaw Jan, Schroder, S. L., Mandel, I., Gall, Christa & Bruun, S. H., 20 Oct 2017, In: Astrophysics Journal Letters. 848, 2, L31.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Redshift remapping and cosmic acceleration in dark-matter-dominated cosmological models
Wojtak, Radoslaw Jan & Prada, F., 10 Jun 2017, In: Monthly Notices of the Royal Astronomical Society. 470, 4, p. 4493-4511Research output: Contribution to journal › Journal article › Research › peer-review
- 2016
- Published
Testing the mapping between redshift and cosmic scale factor
Wojtak, Radoslaw Jan & Prada, F., 21 May 2016, In: Monthly Notices of the Royal Astronomical Society. 458, 3, p. 3331-3340Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Voids in cosmological simulations over cosmic time
Wojtak, Radoslaw Jan, Powell, D. & Abel, T., 1 Jun 2016, In: Monthly Notices of the Royal Astronomical Society. 458, 4, p. 4431-4442Research output: Contribution to journal › Journal article › Research › peer-review
- 2015
- Published
Radial orbit instability in dwarf dark matter haloes
Gajda, G., Lokas, E. L. & Wojtak, Radoslaw Jan, 11 Feb 2015, In: Monthly Notices of the Royal Astronomical Society. 447, 1, p. 97-109Research output: Contribution to journal › Journal article › Research › peer-review
- Published
NON-UNIVERSALITY OF DARK-MATTER HALOS: CUSPS, CORES, AND THE CENTRAL POTENTIAL
Hjorth, Jens, Williams, L. L. R., Wojtak, Radoslaw Jan & McLaughlin, M., 20 Sep 2015, In: Astrophysical Journal. 811, 1, 2.Research output: Contribution to journal › Journal article › Research › peer-review
- 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, , 11 May 2015, In: Monthly Notices of the Royal Astronomical Society. 449, 2, p. 1897-1920Research output: Contribution to journal › Journal article › Research › peer-review
- 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. 944-955Research output: Contribution to journal › Journal article › Research › peer-review
- 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. 1644-1659Research output: Contribution to journal › Journal article › Research › peer-review
- 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
- 2014
- 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. 1887-1896Research output: Contribution to journal › Journal article › Research › peer-review
- 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
- 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, , Jun 2014, In: Monthly Notices of the Royal Astronomical Society. 441, 2, p. 1513-1536Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Statistical Mechanics of Collisionless Orbits. IV. Distribution of Angular Momentum
Williams, L. L. R., Hjorth, Jens & Wojtak, Radoslaw Jan, 1 Mar 2014, In: Astrophysical Journal. 783, 1, 10 p., 13.Research output: Contribution to journal › Journal article › Research › peer-review
- 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. 1805-1812Research output: Contribution to journal › Journal article › Research › peer-review
- 2013
- 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. 2639-2649Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Ursa Major II - reproducing the observed properties through tidal disruption
Smith, R., Felhauer, M., Candlish, G. N., Wojtak, Radoslaw Jan, Farias, J. P. & Blana, M., 1 Aug 2013, In: Monthly Notices of the Royal Astronomical Society. 433, 3, p. 2529-2544Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Phase-space shapes of clusters and rich groups of galaxies
Wojtak, Radoslaw Jan, 2 Nov 2013, In: Astronomy & Astrophysics. 559, UNSP A89.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Orbital anisotropy in cosmological haloes revisited
Wojtak, Radoslaw Jan, Gottloeber, S. & Klypin, A., 1 Sep 2013, In: Monthly Notices of the Royal Astronomical Society. 434, 2, p. 1576-1585Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Physical properties underlying observed kinematics of satellite galaxies
Wojtak, Radoslaw Jan & Mamon, G. A., 1 Jan 2013, In: Monthly Notices of the Royal Astronomical Society. 428, 3, p. 2407-2417Research output: Contribution to journal › Journal article › Research › peer-review
- 2012
- Published
Spatial Anisotropy of Galaxy Kinematics in Sloan Digital Sky Survey Galaxy Clusters
Skielboe, A., Wojtak, Radoslaw Jan, Pedersen, K., Rozo, E. & Rykoff, E. S., 10 Oct 2012, In: Astrophysics Journal Letters. 758, 1, p. L16Research output: Contribution to journal › Journal article › Research › peer-review
ID: 40108628
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The Distance to NGC 4993: The Host Galaxy of the Gravitational-wave Event GW170817
Research output: Contribution to journal › Journal article › Research › peer-review
Published -
70
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Cosmic dissonance: are new physics or systematics behind a short sound horizon?
Research output: Contribution to journal › Journal article › Research › peer-review
Published -
57
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Low-redshift measurement of the sound horizon through gravitational time-delays
Research output: Contribution to journal › Journal article › Research › peer-review
Published