Seshadri Nadathur Portrait

Dr Seshadri Nadathur

Associate Professor in Cosmology

Seshadri.Nadathur@port.ac.uk

PhD Supervisor

View my research outputs

Summary

I am Associate Professor in Cosmology and an Ernest Rutherford Fellow at the Institute of Cosmology and Gravitation. My research area is observational cosmology – this means I study the properties of dark energy, dark matter and gravity, using the large-scale structure of the Universe and based on galaxy survey data collected by the leading ground-based and space telescopes.

My research is funded by the Science and Technology Facilities Council (STFC) and previously by the European Commission.

Research interests

I study the large-scale structure of the Universe, analysing the statistical patterns in the clustering of millions of galaxies to uncover cosmological information. I work on redshift-space distortions, baryon acoustic oscillations, gravitational lensing and cross-correlations with the cosmic microwave background anisotropies, and I am particularly interested in the use of new cosmological probes beyond two-point clustering statistics, such as cosmic voids or density-split statistics. 

A large fraction of my work involves the Dark Energy Spectroscopic Instrument survey, or DESI. DESI is a 5-year spectroscopic survey programme to map the positions of 40 million galaxies and quasars in order to determine the dark energy equation of state, the neutrino mass scale, and a host of other science results. I have led the Galaxy and Quasar Clustering working group in DESI since 2022.

Another large part of my work is within the Euclid Consortium. Euclid is a space telescope, launched in 2023, which combines spectroscopic measurements of around 30 million galaxies with weak lensing and photometric surveys of over a billion. I am the PI of a UK Space Agency grant at Portsmouth funding our work on the Euclid Science Ground Segment infrastructure development, and lead a group creating the spectroscopic galaxy catalogues and visibility mask for clustering science. I am also coordinator for a Key Project on measuring baryon acoustic oscillations.

In the past I also worked on the extended Baryon Oscillation Spectroscopic Survey (eBOSS) and the Dark Energy Survey (DES).

Research outputs

2026

Euclid Quick Data Release (Q1): XXXVI. Galaxy shapes and alignments in the cosmic web

Collaboration, E., Laigle, C., Gouin, C., Sarron, F., Quilley, L., Pichon, C., Kraljic, K., Durret, F., Chisari, N. E., Kuchner, U., Malavasi, N., Magliocchetti, M., McCracken, H. J., Sorce, J. G., Kang, Y., McPartland, C. J. R., Toft, S., Aghanim, N., Altieri, B., Amara, A., Andreon, S., Auricchio, N., Aussel, H., Baccigalupi, C., Baldi, M., Balestra, A., Bardelli, S., Basset, A., Battaglia, P., Bernardeau, F., Biviano, A., Bonchi, A., Branchini, E., Brescia, M., Brinchmann, J., Camera, S., Cañas-Herrera, G., Capobianco, V., Carbone, C., Carretero, J., Casas, S., Castellano, M., Castignani, G., Cavuoti, S., Percival, W. J., Schewtschenko, J. A., Gaztanaga, E., Joudaki, S., Nadathur, S., Naidoo, K.

1 Jul 2026, In: Astronomy and Astrophysics. 711, 22p., A36

Research output: Article

Euclid Quick Data Release (Q1): XXXV. The role of cosmic connectivity in shaping galaxy clusters

Collaboration, E., Gouin, C., Laigle, C., Sarron, F., Bonnaire, T., Sorce, J. G., Aghanim, N., Magliocchetti, M., Quilley, L., Boldrini, P., Durret, F., Pichon, C., Kuchner, U., Malavasi, N., Kraljic, K., Gavazzi, R., Kang, Y., Stanford, S. A., Awad, P., Altieri, B., Amara, A., Andreon, S., Auricchio, N., Aussel, H., Baccigalupi, C., Baldi, M., Balestra, A., Bardelli, S., Basset, A., Battaglia, P., Bernardeau, F., Biviano, A., Bonchi, A., Branchini, E., Brescia, M., Brinchmann, J., Camera, S., Cañas-Herrera, G., Capobianco, V., Carbone, C., Carretero, J., Castellano, M., Castignani, G., Cavuoti, S., Chambers, K. C., Percival, W. J., Schewtschenko, J. A., Gaztanaga, E., Nadathur, S., Naidoo, K.

1 Jul 2026, In: Astronomy and Astrophysics. 711, 17p., A35

Research output: Article

Euclid Quick Data Release (Q1): XXXI. LEMON – LEns MOdelling with Neural networks. Automated and fast modelling of Euclid gravitational lenses with singular isothermal ellipsoid mass profile

Collaboration, E., Busillo, V., Tortora, C., Metcalf, R. B., Nightingale, J. W., Meneghetti, M., Gentile, F., Gavazzi, R., Zhong, F., Li, R., Clément, B., Covone, G., Napolitano, N. R., Courbin, F., Walmsley, M., Jullo, E., Pearson, J., Brun, A. M. C. L., Leuzzi, L., Aghanim, N., Altieri, B., Amara, A., Andreon, S., Aussel, H., Baccigalupi, C., Baldi, M., Bardelli, S., Battaglia, P., Biviano, A., Branchini, E., Brescia, M., Brinchmann, J., Camera, S., Cañas-Herrera, G., Capobianco, V., Carbone, C., Cardone, V. F., Carretero, J., Casas, S., Castellano, M., Castignani, G., Cavuoti, S., Chambers, K. C., Cimatti, A., Colodro-Conde, C., Markovic, K., Schewtschenko, J. A., Gaztanaga, E., Nadathur, S., Naidoo, K.

1 Jul 2026, In: Astronomy and Astrophysics. 711, 27p., A31

Research output: Article

Euclid Quick Data Release (Q1): XXVIII. The Strong Lensing Discovery Engine C - Finding lenses with machine learning

Collaboration, E., Lines, N. E. P., Collett, T. E., Walmsley, M., Rojas, K., Li, T., Leuzzi, L., Manjón-García, A., Vincken, S. H., Wilde, J., Holloway, P., Verma, A., Metcalf, R. B., Andika, I. T., Melo, A., Melchior, M., Sánchez, H. D., Díaz-Sánchez, A., Barroso, J. A. A., Clément, B., Krawczyk, C., Pearce-Casey, R., Serjeant, S., Courbin, F., Despali, G., Gavazzi, R., Schuldt, S., Degaudenzi, H., Ecker, L. R., Enzi, W. J. R., Finner, K., Galan, A., Giocoli, C., Hogg, N. B., Jahnke, K., Kruk, S., Mahler, G., More, A., Nagam, B. C., Pearson, J., de Murieta, A. S., Weisenbach, L., Amara, A., Casas, S., Nichol, R. C., Percival, W. J., Schewtschenko, J. A., Gaztanaga, E., Nadathur, S., Naidoo, K.

1 Jul 2026, In: Astronomy and Astrophysics. 711, 24p., A28

Research output: Article

Euclid Quick Data Release (Q1): XXVII. The strong-lensing discovery engine B. Early strong-lens candidates from the visual inspection of galaxies with a high-velocity dispersion

Collaboration, E., Rojas, K., Collett, T. E., Barroso, J. A. A., Nightingale, J. W., Stern, D., Moustakas, L. A., Schuldt, S., Despali, G., Melo, A., Walmsley, M., Ballard, D. J., Enzi, W. J. R., Li, T., de Murieta, A. S., Andika, I. T., Clément, B., Courbin, F., Ecker, L. R., Gavazzi, R., Jackson, N., Kovács, A., Matavulj, P., Meneghetti, M., Serjeant, S., Sluse, D., Tortora, C., Verma, A., Marchetti, L., O'Riordan, C. M., McCarthy, K., Suyu, S. H., Metcalf, R. B., Aghanim, N., Altieri, B., Amara, A., Andreon, S., Auricchio, N., Aussel, H., Baccigalupi, C., Baldi, M., Balestra, A., Bardelli, S., Casas, S., Nichol, R. C., Percival, W. J., Schewtschenko, J. A., Gaztanaga, E., Nadathur, S., Naidoo, K.

1 Jul 2026, In: Astronomy and Astrophysics. 711, 20p., A27

Research output: Article

Euclid Quick Data Release (Q1): XXVI. The Strong Lensing Discovery Engine A – System overview and first lens sample

Collaboration, E., Walmsley, M., Holloway, P., Lines, N. E. P., Rojas, K., Collett, T. E., Verma, A., Li, T., Nightingale, J. W., Despali, G., Schuldt, S., Gavazzi, R., Melo, A., Metcalf, R. B., Andika, I. T., Leuzzi, L., Manjón-García, A., Pearce-Casey, R., Vincken, S. H., Wilde, J., Busillo, V., Tortora, C., Barroso, J. A. A., Dole, H., Ecker, L. R., Pearson, J., Marshall, P. J., More, A., Saifollahi, T., Gracia-Carpio, J., Baeten, E., Cornen, C., Macmillan, C., Kruk, S., Remmelgas, K. A., Clément, B., Degaudenzi, H., Courbin, F., Bovy, J., Casas, S., Dannerbauer, H., Hogg, N. B., Weisenbach, L., Amara, A., Nichol, R. C., Percival, W. J., Schewtschenko, J. A., Gaztanaga, E., Nadathur, S., Naidoo, K.

1 Jul 2026, In: Astronomy and Astrophysics. 711, 21p., A26

Research output: Article

Euclid Quick Data Release (Q1): XIX. First study of red quasars selection

Collaboration, E., Tarsitano, F., Fotopoulou, S., Banerji, M., Petley, J., Faisst, A. L., Tucci, M., Tacchella, S., Toba, Y., Landt, H., Fu, Y., Cunha, P. A. C., Duncan, K., Roster, W., Salvato, M., Laloux, B., Dayal, P., Ricci, F., Aghanim, N., Altieri, B., Amara, A., Andreon, S., Auricchio, N., Aussel, H., Baccigalupi, C., Baldi, M., Balestra, A., Bardelli, S., Battaglia, P., Biviano, A., Bonchi, A., Branchini, E., Brescia, M., Brinchmann, J., Camera, S., Cañas-Herrera, G., Capobianco, V., Carbone, C., Carretero, J., Casas, S., Castellano, M., Castignani, G., Cavuoti, S., Chambers, K. C., Cimatti, A., Percival, W. J., Schewtschenko, J. A., Gaztanaga, E., Nadathur, S., Naidoo, K.

1 Jul 2026, In: Astronomy and Astrophysics. 711, 18p., A19

Research output: Article

Euclid Quick Data Release (Q1): IX. First visual morphology catalogue

Collaboration, E., Walmsley, M., Huertas-Company, M., Quilley, L., Masters, K. L., Kruk, S., Remmelgas, K. A., Popp, J. J., Romelli, E., O'Ryan, D., Dickinson, H. J., Lintott, C. J., Serjeant, S., Smethurst, R. J., Simmons, B., Makechemu, J. S., Garland, I. L., Roberts, H., Mantha, K., Fortson, L. F., Géron, T., Keel, W., Baeten, E. M., Macmillan, C., Bovy, J., Casas, S., Leo, C. D., Sánchez, H. D., Katona, J., Kovács, A., Aghanim, N., Altieri, B., Amara, A., Andreon, S., Auricchio, N., Aussel, H., Baccigalupi, C., Baldi, M., Balestra, A., Bardelli, S., Basset, A., Battaglia, P., Bender, R., Biviano, A., Nichol, R. C., Percival, W. J., Schewtschenko, J. A., Gaztanaga, E., Nadathur, S., Naidoo, K.

1 Jul 2026, In: Astronomy and Astrophysics. 711, 19p., A9

Research output: Article

Euclid Quick Data Release (Q1): I. Data release overview

Collaboration, E., Aussel, H., Tereno, I., Schirmer, M., Alguero, G., Altieri, B., Balbinot, E., de Boer, T., Casenove, P., Corcho-Caballero, P., Furusawa, H., Furusawa, J., Hudson, M. J., Jahnke, K., Libet, G., Macias-Perez, J., Masoumzadeh, N., Mohr, J. J., Odier, J., Vassallo, T., Kleijn, G. V., Zacchei, A., Aghanim, N., Amara, A., Andreon, S., Auricchio, N., Awan, S., Azzollini, R., Baccigalupi, C., Baldi, M., Balestra, A., Bardelli, S., Basset, A., Battaglia, P., Belikov, A. N., Bender, R., Biviano, A., Bonchi, A., Bonino, D., Casas, S., Markovic, K., Nichol, R. C., Percival, W. J., Pollack, J. E., Schewtschenko, J. A., Avila, S., Gaztanaga, E., Joudaki, S., Nadathur, S., Naidoo, K.

1 Jul 2026, In: Astronomy and Astrophysics. 711, 25p., A1

Research output: Article

Euclid Quick Data Release (Q1): IV. From images to multiwavelength catalogues: the Euclid MERge Processing Function

Collaboration, E., Romelli, E., Kümmel, M., Dole, H., Gracia-Carpio, J., Merlin, E., Galeotta, S., Castellano, M., Caro, F., Soubrie, E., Maurin, L., Cabanac, R., Dimauro, P., Huertas-Company, M., Lepinzan, M. D., Vassallo, T., Walmsley, M., Zinchenko, I. A., Boucaud, A., Calabro, A., Roscani, V., Tramacere, A., Douspis, M., Fontana, A., Aghanim, N., Altieri, B., Amara, A., Andreon, S., Auricchio, N., Aussel, H., Baccigalupi, C., Baldi, M., Balestra, A., Bardelli, S., Basset, A., Battaglia, P., Belikov, A. N., Biviano, A., Bonchi, A., Bonino, D., Branchini, E., Brescia, M., Brinchmann, J., Casas, S., Nichol, R. C., Percival, W. J., Schewtschenko, J. A., Gaztanaga, E., Nadathur, S., Naidoo, K.

1 Jul 2026, In: Astronomy and Astrophysics. 711, 23p., A4

Research output: Article

View all my research outputs