Publications of Jorrit Leenaarts ordered by citations


A list of publications authored or co-authored by Jorrit Leenaarts, derived from the SAO/NASA Astrophysics Data System (ADS) and ordered by the numbers of citations.

Orcid ID: 0000-0003-4936-4211

Number of papers: 81
No. of citations: 6355

1248 The Interface Region Imaging Spectrograph (IRIS)
De Pontieu, B., Title, A. M., Lemen, J. R., Kushner, G. D., Akin, D. J., Allard, B., Berger, T., Boerner, P., Cheung, M., Chou, C., Drake, J. F., Duncan, D. W., Freeland, S., Heyman, G. F., Hoffman, C., Hurlburt, N. E., Lindgren, R. W., Mathur, D., Rehse, R., Sabolish, D., Seguin, R., Schrijver, C. J., Tarbell, T. D., Wülser, J.-P., Wolfson, C. J., Yanari, C., Mudge, J., Nguyen-Phuc, N., Timmons, R., van Bezooijen, R., Weingrod, I., Brookner, R., Butcher, G., Dougherty, B., Eder, J., Knagenhjelm, V., Larsen, S., Mansir, D., Phan, L., Boyle, P., Cheimets, P. N., DeLuca, E. E., Golub, L., Gates, R., Hertz, E., McKillop, S., Park, S., Perry, T., Podgorski, W. A., Reeves, K., Saar, S., Testa, P., Tian, H., Weber, M., Dunn, C., Eccles, S., Jaeggli, S. A., Kankelborg, C. C., Mashburn, K., Pust, N., Springer, L., Carvalho, R., Kleint, L., Marmie, J., Mazmanian, E., Pereira, T. M. D., Sawyer, S., Strong, J., Worden, S. P., Carlsson, M., Hansteen, V. H., Leenaarts, J., Wiesmann, M., Aloise, J., Chu, K.-C., Bush, R. I., Scherrer, P. H., Brekke, P., Martinez-Sykora, J., Lites, B. W., McIntosh, S. W., Uitenbroek, H., Okamoto, T. J., Gummin, M. A., Auker, G., Jerram, P., Pool, P. & Waltham, N., 2014, Solar Physics, 289, 2733
469 The stellar atmosphere simulation code Bifrost. Code description and validation
Gudiksen, B. V., Carlsson, M., Hansteen, V. H., Hayek, W., Leenaarts, J. & Martínez-Sykora, J., 2011, A&A, 531, A154
261 The Formation of the Hα Line in the Solar Chromosphere
Leenaarts, J., Carlsson, M. & Rouppe van der Voort, L., 2012, ApJ, 749, 136
260 Star cluster disruption by giant molecular clouds
Gieles, M., Portegies Zwart, S. F., Baumgardt, H., Athanassoula, E., Lamers, H. J. G. L. M., Sipior, M. & Leenaarts, J., 2006, MNRAS, 371, 793
232 The Formation of IRIS Diagnostics. II. The Formation of the Mg II h&k Lines in the Solar Atmosphere
Leenaarts, J., Pereira, T. M. D., Carlsson, M., Uitenbroek, H. & De Pontieu, B., 2013, ApJ, 772, 90
198 On-disk Counterparts of Type II Spicules in the Ca II 854.2 nm and Hα Lines
Rouppe van der Voort, L., Leenaarts, J., de Pontieu, B., Carlsson, M. & Vissers, G., 2009, ApJ, 705, 272
197 A publicly available simulation of an enhanced network region of the Sun
Carlsson, Mats, Hansteen, Viggo H., Gudiksen, Boris V., Leenaarts, Jorrit & De Pontieu, Bart, 2016, A&A, 585, A4
194 Approximations for radiative cooling and heating in the solar chromosphere
Carlsson, M. & Leenaarts, J., 2012, A&A, 539, A39
174 The Formation of IRIS Diagnostics. I. A Quintessential Model Atom of Mg II and General Formation Properties of the Mg II h&k Lines
Leenaarts, J., Pereira, T. M. D., Carlsson, M., Uitenbroek, H. & De Pontieu, B., 2013, ApJ, 772, 89
173 Non-equilibrium hydrogen ionization in 2D simulations of the solar atmosphere
Leenaarts, J., Carlsson, M., Hansteen, V. & Rutten, R. J., 2007, A&A, 473, 625
156 STiC: A multiatom non-LTE PRD inversion code for full-Stokes solar observations
de la Cruz Rodríguez, J., Leenaarts, J., Danilovic, S. & Uitenbroek, H., 2019, A&A, 623, A74
140 Radiative transfer with scattering for domain-decomposed 3D MHD simulations of cool stellar atmospheres. Numerical methods and application to the quiet, non-magnetic, surface of a solar-type star
Hayek, W., Asplund, M., Carlsson, M., Trampedach, R., Collet, R., Gudiksen, B. V., Hansteen, V. H. & Leenaarts, J., 2010, A&A, 517, A49
119 The Formation of IRIS Diagnostics. III. Near-ultraviolet Spectra and Images
Pereira, T. M. D., Leenaarts, J., De Pontieu, B., Carlsson, M. & Uitenbroek, H., 2013, ApJ, 778, 143
112 Non-LTE oxygen line formation in 3D hydrodynamic model stellar atmospheres
Amarsi, A. M., Asplund, M., Collet, R. & Leenaarts, J., 2016, MNRAS, 455, 3735
105 Three-Dimensional Non-LTE Radiative Transfer Computation of the CA 8542 Infrared Line From a Radiation-MHD Simulation
Leenaarts, J., Carlsson, M., Hansteen, V. & Rouppe van der Voort, L., 2009, ApJ, 694, L128
101 How realistic are solar model atmospheres?
Pereira, T. M. D., Asplund, M., Collet, R., Thaler, I., Trampedach, R. & Leenaarts, J., 2013, A&A, 554, A118
94 Non-LTE Inversions of the Mg II h & k and UV Triplet Lines
de la Cruz Rodríguez, Jaime, Leenaarts, Jorrit & Asensio Ramos, Andrés, 2016, ApJ, 830, L30
93 3D NLTE analysis of the most iron-deficient star, SMSS0313-6708
Nordlander, T., Amarsi, A. M., Lind, K., Asplund, M., Barklem, P. S., Casey, A. R., Collet, R. & Leenaarts, J., 2017, A&A, 597, A6
93 Non-local thermodynamic equilibrium inversions from a 3D magnetohydrodynamic chromospheric model
de la Cruz Rodríguez, J., Socas-Navarro, H., Carlsson, M. & Leenaarts, J., 2012, A&A, 543, A34
76 What Do IRIS Observations of Mg II k Tell Us about the Solar Plage Chromosphere?
Carlsson, Mats, Leenaarts, Jorrit & De Pontieu, Bart, 2015, ApJ, 809, L30
72 Fast approximation of angle-dependent partial redistribution in moving atmospheres
Leenaarts, J., Pereira, T. & Uitenbroek, H., 2012, A&A, 543, A109
72 On Fibrils and Field Lines: the Nature of Hα Fibrils in the Solar Chromosphere
Leenaarts, Jorrit, Carlsson, Mats & Rouppe van der Voort, Luc, 2015, ApJ, 802, 136
66 Detailed and Simplified Nonequilibrium Helium Ionization in the Solar Atmosphere
Golding, Thomas Peter, Carlsson, Mats & Leenaarts, Jorrit, 2014, ApJ, 784, 30
66 DOT tomography of the solar atmosphere. VI. Magnetic elements as bright points in the blue wing of Hα
Leenaarts, J., Rutten, R. J., Sütterlin, P., Carlsson, M. & Uitenbroek, H., 2006, A&A, 449, 1209
65 Ion-neutral Interactions and Nonequilibrium Ionization in the Solar Chromosphere
Martínez-Sykora, Juan, Leenaarts, Jorrit, De Pontieu, Bart, Nóbrega-Siverio, Daniel, Hansteen, Viggo H., Carlsson, Mats & Szydlarski, Mikolaj, 2020, ApJ, 889, 95
63 Mapping solar magnetic fields from the photosphere to the base of the corona
Ishikawa, Ryohko, Trujillo Bueno, Javier, del Pino Alemán, Tanausú, Okamoto, Takenori J., McKenzie, David E., Auchère, Frédéric, Kano, Ryouhei, Song, Donguk, Yoshida, Masaki, Rachmeler, Laurel A., Kobayashi, Ken, Hara, Hirohisa, Kubo, Masahito, Narukage, Noriyuki, Sakao, Taro, Shimizu, Toshifumi, Suematsu, Yoshinori, Bethge, Christian, De Pontieu, Bart, Sainz Dalda, Alberto, Vigil, Genevieve D., Winebarger, Amy, Alsina Ballester, Ernest, Belluzzi, Luca, Štěpán, Jiří, Ramos, Andrés Asensio, Carlsson, Mats & Leenaarts, Jorrit, 2021, Science Advances, 7, eabe8406
60 Partial redistribution in 3D non-LTE radiative transfer in solar-atmosphere models
Sukhorukov, Andrii V. & Leenaarts, Jorrit, 2017, A&A, 597, A46
59 Fan-shaped jets above the light bridge of a sunspot driven by reconnection
Robustini, Carolina, Leenaarts, Jorrit, de la Cruz Rodriguez, Jaime & Rouppe van der Voort, Luc, 2016, A&A, 590, A57
59 On the minimum temperature of the quiet solar chromosphere
Leenaarts, J., Carlsson, M., Hansteen, V. & Gudiksen, B. V., 2011, A&A, 530, A124
57 The Quiet Solar Atmosphere Observed and Simulated in Na I D1
Leenaarts, J., Rutten, R. J., Reardon, K., Carlsson, M. & Hansteen, V., 2010, ApJ, 709, 1362
56 The Formation of IRIS Diagnostics. VI. The Diagnostic Potential of the C II Lines at 133.5 nm in the Solar Atmosphere
Rathore, Bhavna, Carlsson, Mats, Leenaarts, Jorrit & De Pontieu, Bart, 2015, ApJ, 811, 81
56 Observational constraints on the origin of the elements. II. 3D non-LTE formation of Ba II lines in the solar atmosphere
Gallagher, A. J., Bergemann, M., Collet, R., Plez, B., Leenaarts, J., Carlsson, M., Yakovleva, S. A. & Belyaev, A. K., 2020, A&A, 634, A55
52 Three-dimensional Radiative Transfer Simulations of the Scattering Polarization of the Hydrogen Lyα Line in a Magnetohydrodynamic Model of the Chromosphere-Corona Transition Region
Štěpán, J., Trujillo Bueno, J., Leenaarts, J. & Carlsson, M., 2015, ApJ, 803, 65
50 Time-dependent hydrogen ionisation in 3D simulations of the solar chromosphere. Methods and first results
Leenaarts, J. & Wedemeyer-Böhm, S., 2006, A&A, 460, 301
48 Non-equilibrium Helium Ionization in an MHD Simulation of the Solar Atmosphere
Golding, Thomas Peter, Leenaarts, Jorrit & Carlsson, Mats, 2016, ApJ, 817, 125
46 DOT tomography of the solar atmosphere. III. Observations and simulations of reversed granulation
Leenaarts, J. & Wedemeyer-Böhm, S., 2005, A&A, 431, 687
44 Inter-network regions of the Sun at millimetre wavelengths
Wedemeyer-Böhm, S., Ludwig, H. G., Steffen, M., Leenaarts, J. & Freytag, B., 2007, A&A, 471, 977
43 The multi-thermal chromosphere. Inversions of ALMA and IRIS data
da Silva Santos, J. M., de la Cruz Rodríguez, J., Leenaarts, J., Chintzoglou, G., De Pontieu, B., Wedemeyer, S. & Szydlarski, M., 2020, A&A, 634, A56
41 An observationally constrained model of strong magnetic reconnection in the solar chromosphere. Atmospheric stratification and estimates of heating rates
Díaz Baso, C. J., de la Cruz Rodríguez, J. & Leenaarts, J., 2021, A&A, 647, A188
41 Chromospheric heating during flux emergence in the solar atmosphere
Leenaarts, Jorrit, de la Cruz Rodríguez, Jaime, Danilovic, Sanja, Scharmer, Göran & Carlsson, Mats, 2018, A&A, 612, A28
39 Temperature constraints from inversions of synthetic solar optical, UV, and radio spectra
da Silva Santos, J. M., de la Cruz Rodríguez, J. & Leenaarts, J., 2018, A&A, 620, A124
39 A comparison of solar proxy-magnetometry diagnostics
Leenaarts, J., Rutten, R. J., Carlsson, M. & Uitenbroek, H., 2006, A&A, 452, L15
38 Observed Variability of the Solar Mg II h Spectral Line
Schmit, D., Bryans, P., De Pontieu, B., McIntosh, S., Leenaarts, J. & Carlsson, M., 2015, ApJ, 811, 127
38 The Effect of Isotopic Splitting on the Bisector and Inversions of the Solar Ca II 854.2 nm Line
Leenaarts, Jorrit, de la Cruz Rodríguez, Jaime, Kochukhov, Oleg & Carlsson, Mats, 2014, ApJ, 784, L17
36 The cause of spatial structure in solar He I 1083 nm multiplet images
Leenaarts, Jorrit, Golding, Thomas, Carlsson, Mats, Libbrecht, Tine & Joshi, Jayant, 2016, A&A, 594, A104
36 A First Comparison of Millimeter Continuum and Mg II Ultraviolet Line Emission from the Solar Chromosphere
Bastian, T. S., Chintzoglou, G., De Pontieu, B., Shimojo, M., Schmit, D., Leenaarts, J. & Loukitcheva, M., 2017, ApJ, 845, L19
36 Observations of Ellerman bomb emission features in He I D3 and He I 10 830 Å
Libbrecht, Tine, Joshi, Jayant, de la Cruz Rodríguez, Jaime, Leenaarts, Jorrit & Ramos, Andrés Asensio, 2017, A&A, 598, A33
33 A Detailed Comparison between the Observed and Synthesized Properties of a Simulated Type II Spicule
Martínez-Sykora, Juan, De Pontieu, Bart, Leenaarts, Jorrit, Pereira, Tiago M. D., Carlsson, Mats, Hansteen, Viggo, Stern, Julie V., Tian, Hui, McIntosh, Scott W. & Rouppe van der Voort, Luc, 2013, ApJ, 771, 66
32 Spatio-temporal analysis of chromospheric heating in a plage region
Morosin, R., de la Cruz Rodríguez, J., Díaz Baso, C. J. & Leenaarts, J., 2022, A&A, 664, A8
32 Formation of the helium extreme-UV resonance lines
Golding, T. P., Leenaarts, J. & Carlsson, M., 2017, A&A, 597, A102
31 Radiation hydrodynamics in simulations of the solar atmosphere
Leenaarts, Jorrit, 2020, Living Reviews in Solar Physics, 17, 3
29 Quiet-Sun imaging asymmetries in Na I D1 compared with other strong Fraunhofer lines
Rutten, R. J., Leenaarts, J., Rouppe van der Voort, L. H. M., de Wijn, A. G., Carlsson, M. & Hansteen, V., 2011, A&A, 531, A17
28 Quiet Sun Center to Limb Variation of the Linear Polarization Observed by CLASP2 Across the Mg II h and k Lines
Rachmeler, L. A., Trujillo Bueno, J., McKenzie, D. E., Ishikawa, R., Auchère, F., Kobayashi, K., Kano, R., Okamoto, T. J., Bethge, C. W., Song, D., Alsina Ballester, E., Belluzzi, L., del Pino Alemán, T., Asensio Ramos, A. Asensio, Yoshida, M., Shimizu, T., Winebarger, A., Kobelski, A. R., Vigil, G. D., De Pontieu, B., Narukage, N., Kubo, M., Sakao, T., Hara, H., Suematsu, Y., Štěpán, J., Carlsson, M. & Leenaarts, J., 2022, ApJ, 936, 67
26 Physical properties of bright Ca II K fibrils in the solar chromosphere
Kianfar, Sepideh, Leenaarts, Jorrit, Danilovic, Sanja, de la Cruz Rodríguez, Jaime & Díaz Baso, Carlos José, 2020, A&A, 637, A1
24 Active region chromospheric magnetic fields. Observational inference versus magnetohydrostatic modelling
Vissers, G. J. M., Danilovic, S., Zhu, X., Leenaarts, J., Díaz Baso, C. J., da Silva Santos, J. M., de la Cruz Rodríguez, J. & Wiegelmann, T., 2022, A&A, 662, A88
22 The Hanle Effect of Lyα in a Magnetohydrodynamic Model of the Solar Transition Region
Štěpán, J., Trujillo Bueno, J., Carlsson, M. & Leenaarts, J., 2012, ApJ, 758, L43
22 Heating of the solar chromosphere through current dissipation
da Silva Santos, J. M., Danilovic, S., Leenaarts, J., de la Cruz Rodríguez, J., Zhu, X., White, S. M., Vissers, G. J. M. & Rempel, M., 2022, A&A, 661, A59
21 ALMA observations of transient heating in a solar active region
da Silva Santos, J. M., de la Cruz Rodríguez, J., White, S. M., Leenaarts, J., Vissers, G. J. M. & Hansteen, V. H., 2020, A&A, 643, A41
21 Chromospheric LAyer SpectroPolarimeter (CLASP2)
Narukage, Noriyuki, McKenzie, David E., Ishikawa, Ryoko, Trujillo-Bueno, Javier, De Pontieu, Bart, Kubo, Masahito, Ishikawa, Shin-nosuke, Kano, Ryouhei, Suematsu, Yoshinori, Yoshida, Masaki, Rachmeler, Laurel A., Kobayashi, Ken, Cirtain, Jonathan W., Winebarger, Amy R., Asensio Ramos, Andres, del Pino Aleman, Tanausu, Štępán, Jiri, Belluzzi, Luca, Larruquert, Juan Ignacio, Auchère, Frédéric, Leenaarts, Jorrit & Carlsson, Mattias J. L., 2016, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray (Editors: den Herder, Jan-Willem A., Takahashi, Tadayuki & Bautz, Marshall), Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series, 9905, p. 990508
16 Mg II h&k spectra of an enhanced network region simulated with the MURaM-ChE code: Results using 1.5D synthesis
Ondratschek, P., Przybylski, D., Smitha, H. N., Cameron, R., Solanki, S. K. & Leenaarts, J., 2024, A&A, 692, A6
16 New Light on an Old Problem of the Cores of Solar Resonance Lines
Judge, Philip G., Kleint, Lucia, Leenaarts, Jorrit, Sukhorukov, Andrii V. & Vial, Jean-Claude, 2020, ApJ, 901, 32
15 The Formation of IRIS Diagnostics. IX. The Formation of the C I 135.58 NM Line in the Solar Atmosphere
Lin, Hsiao-Hsuan, Carlsson, Mats & Leenaarts, Jorrit, 2017, ApJ, 846, 40
14 Numerical non-LTE 3D radiative transfer using a multigrid method
Bjørgen, Johan P. & Leenaarts, Jorrit, 2017, A&A, 599, A118
9 The Dutch Open Telescope on La Palma
Rutten, R. J., Bettonvil, F. C. M., Hammerschlag, R. H., Jägers, A. P. L., Leenaarts, J., Snik, F., Sütterlin, P., Tziotziou, K. & de Wijn, A. G., 2004, Multi-Wavelength Investigations of Solar Activity (Editors: Stepanov, Alexander V., Benevolenskaya, Elena E. & Kosovichev, Alexander G.), IAU Symposium, 223, p. 597
9 High flow speeds and transition-region-like temperatures in the solar chromosphere during flux emergence: Evidence from imaging spectropolarimetry in He I 1083 nm and numerical simulations
Leenaarts, J., van Noort, M., de la Cruz Rodríguez, J., Danilovic, S., Díaz Baso, C. J., Hillberg, T., Sütterlin, P., Kiselman, D., Scharmer, G. & Solanki, S. K., 2025, A&A, 696, A3
9 Formation and heating of chromospheric fibrils in a radiation-MHD simulation
Druett, M. K., Leenaarts, J., Carlsson, M. & Szydlarski, M., 2022, A&A, 665, A6
9 Shape-based clustering of synthetic Stokes profiles using k-means and k-Shape
Moe, Thore E., Pereira, Tiago M. D., Calvo, Flavio & Leenaarts, Jorrit, 2023, A&A, 675, A130
8 Polarization Accuracy Verification of the Chromospheric LAyer SpectroPolarimeter
Song, Donguk, Ishikawa, Ryohko, Kano, Ryouhei, McKenzie, David E., Trujillo Bueno, Javier, Auchère, Frédéric, Rachmeler, Laurel A., Okamoto, Takenori J., Yoshida, Masaki, Kobayashi, Ken, Bethge, Christian, Hara, Hirohisa, Shinoda, Kazuya, Shimizu, Toshifumi, Suematsu, Yoshinori, De Pontieu, Bart, Winebarger, Amy, Narukage, Noriyuki, Kubo, Masahito, Sakao, Taro, Asensio Ramos, Andrés, Belluzzi, Luca, Štěpán, Jiří, Carlsson, Mats, del Pino Alemán, Tanausú, Alsina Ballester, Ernest, Vigil, Genevieve D. & Leenaarts, Jorrit, 2022, Solar Physics, 297, 135
8 Comparison of Solar Fine Structure Observed Simultaneously in Lyα and Mg II h
Schmit, D., Sukhorukov, A. V., De Pontieu, B., Leenaarts, J., Bethge, C., Winebarger, A., Auchère, F., Bando, T., Ishikawa, R., Kano, R., Kobayashi, K., Narukage, N. & Trujillo Bueno, J., 2017, ApJ, 847, 141
7 Structure and dynamics of the internetwork solar chromosphere: Results of a small-scale dynamo simulation
Przybylski, D., Cameron, R., Solanki, S. K., Rempel, M., Danilovic, S. & Leenaarts, J., 2025, A&A, 703, A148
7 Comparative clustering analysis of Ca II 854.2 nm spectral profiles from simulations and observations
Moe, Thore E., Pereira, Tiago M. D., Rouppe van der Voort, Luc, Carlsson, Mats, Hansteen, Viggo, Calvo, Flavio & Leenaarts, Jorrit, 2024, A&A, 682, A11
6 Improved reconstruction of solar magnetic fields from imaging spectropolarimetry through spatio-temporal regularisation
de la Cruz Rodríguez, J. & Leenaarts, J., 2024, A&A, 685, A85
5 Designing wavelength sampling for Fabry-Pérot observations. Information-based spectral sampling
Díaz Baso, C. J., Rouppe van der Voort, L., de la Cruz Rodríguez, J. & Leenaarts, J., 2023, A&A, 673, A35
5 Rapid blue- and redshifted excursions in Hα line profiles synthesized from realistic 3D magnetohydrodynamic simulations
Danilovic, S., Bjørgen, J. P., Leenaarts, J. & Rempel, M., 2023, A&A, 670, A50
4 Solar Atmospheric Heating Due to Small-scale Events in an Emerging Flux Region
Yadav, Rahul, Kazachenko, Maria D., Afanasyev, Andrey N., de la Cruz Rodríguez, Jaime & Leenaarts, Jorrit, 2023, ApJ, 958, 54
4 The making of robust and highly performing imaging spectropolarimeters for large solar telescopes
Scharmer, G. B., de la Cruz Rodríguez, J., Leenaarts, J., Lindberg, B., Sütterlin, P., Hillberg, T., Pietraszewski, C., de Wijn, A. G., Foster, M. & Storey, J., 2026, A&A, 705, A55
4 Tracing the evolution of radiation-MHD simulations of solar and stellar atmospheres in the Lagrangian frame
Leenaarts, Jorrit, 2018, A&A, 616, A136
3 Jacobian-free Newton-Krylov method for multilevel nonlocal thermal equilibrium radiative transfer problems
Arramy, D., de la Cruz Rodríguez, J. & Leenaarts, J., 2024, A&A, 690, A12
3 Transverse oscillations in 3D along Ca II K bright fibrils in the solar chromosphere
Kianfar, Sepideh, Leenaarts, Jorrit, Esteban Pozuelo, Sara, da Silva Santos, João M., de la Cruz Rodríguez, Jaime & Danilovic, Sanja, 2025, A&A, 698, A124
0 The magnetic sensitivity of the Ca II H and K lines
Kriginsky, M., Leenaarts, J., de la Cruz Rodríguez, J., Danilovic, S. & Andriienko, O., 2026, A&A, 708, A282
0 Solar carbon abundance from 3D non-LTE modelling of the diagnostic lines of the CH molecule
Hoppe, Richard, Bergemann, Maria, Eitner, Philipp, Ellwarth, Momo, Nordlund, Åke, Leenaarts, Jorrit, Plez, Bertrand & Serenelli, Aldo, 2026, MNRAS, 546, staf2085


Created on Mon Jun 8 04:28:31 2026.