Seshadri Nadathur

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

2025

Euclid. I. Overview of the Euclid mission

Achúcarro, A., Adam, R., Adamek, J., Addison, G. E., Aghanim, N., Aguena, M., Ajani, V., Akrami, Y., Al-Bahlawan, A., Alavi, A., Albuquerque, I. S., Alestas, G., Alguero, G., Allaoui, A., Allevato, V., Alonso-Tetilla, A. V., Altieri, B., Alvarez-Candal, A., Amara, A., Avila, S., Bacon, D., Barroso, J. A. A., Beutler, F., Bose, B., Collaboration, E., Collett, T. E., Fiorini, B., Fonseca De La Bella, L., Fonseca, J., Gaztanaga, E., Joudaki, S., Koyama, K., Leclercq, F., Manera, M., Maraston, C., Markovic, K., Mellier, Y., Nadathur, S., Nichol, R. C., Noller, J., Pace, F., Pattison, C., Percival, W. J., Pollack, J. E., Pourtsidou, A., Raccanelli, A., Schewtschenko, J. A., Whalen, D. J., Winther, H. -., Youles, S.

1 May 2025, In: Astronomy and Astrophysics. 697, 94p., A1

Euclid. II. The VIS Instrument

Al-Bahlawan, A., Amara, A., Amiaux, J., Awan, S., Azzollini, R., Benson, K., Berthe, M., Boucher, J., Bozzo, E., Brockley-Blatt, C., Candini, G. P., Cara, C., Chaudery, R. A., Collaboration, E., Cropper, M., Danto, P., Denniston, J., Dryer, B., Dubois, J. -., Endicott, J., Farina, M., Galli, E., Gaztanaga, E., Genolet, L., Giorgio, A. M. D., Gow, J. P. D., Guttridge, P., Hailey, M., Holland, A. D., Horeau, B., Hu, D., Joudaki, S., Khalil, A., Larcheveque, C., Lawrenson, A., Liebing, P., Martignac, J., McCracken, H. J., Murray, N., Nadathur, S., Nakajima, R., Nichol, R. C., Niemi, S. -., Paltani, S., Pendem, A., Percival, W. J., Plana, C., Pool, P., Pourtsidou, A., Schewtschenko, J. A.

1 May 2025, In: Astronomy and Astrophysics. 697, 33p., A2

Euclid. III. The NISP Instrument

Amara, A., Auricchio, N., Balestra, A., Barbier, R., Barriere, J. -., Battaglia, P., Bender, R., Berthe, M., Bodendorf, C., Boenke, T., Bon, W., Bonnefoi, A., Bonoli, C., Caillat, A., Capobianco, V., Carle, M., Casas, R., Castander, F. J., Cho, H., Collaboration, E., Corcione, L., Costille, A., Ducret, F., Dusini, S., Ealet, A., Ferriol, S., Franceschi, E., Garilli, B., Gaztanaga, E., Grupp, F., Hormuth, F., Jahnke, K., Joudaki, S., Ligori, S., Lilje, P. B., Maciaszek, T., Markovic, K., Morgante, G., Nadathur, S., Nichol, R. C., Padilla, C., Percival, W. J., Pourtsidou, A., Prieto, E., Rix, H. -., Schewtschenko, J. A., Schirmer, M., Toledo-Moreo, R., Trifoglio, M., Valenziano, L.

1 May 2025, In: Astronomy and Astrophysics. 697, 31p., A3

Euclid. IV. The NISP Calibration Unit

Amara, A., Andreon, S., Auricchio, N., Baldi, M., Balestra, A., Barbier, R., Bardelli, S., Battaglia, P., Bender, R., Bodendorf, C., Bonino, D., Branchini, E., Brescia, M., Brinchmann, J., Camera, S., Capobianco, V., Carbone, C., Cardone, V. F., Carretero, J., Collaboration, E., Ferriol, S., Gaztanaga, E., Grupp, F., Gutierrez, C. M., Holmes, W., Hormuth, F., Jahnke, K., Joudaki, S., Kubik, B., Laurent, M., Macias-Perez, J., Markovic, K., Marpaud, J., Marton, M., Medinaceli, E., Morgante, G., Nadathur, S., Nichol, R. C., Percival, W. J., Rix, H., Schewtschenko, J. A., Schirmer, M., Scott, T., Secroun, A., Seiffert, M., Stassi, P., Toledo-Moreo, R., Trifoglio, M., Vescovi, C., Wachter, S.

1 May 2025, In: Astronomy and Astrophysics. 697, 21p., A4

Euclid. V. The Flagship galaxy mock catalogue: a comprehensive simulation for the Euclid mission

Amara, A., Aussel, H., Avila, S., Baghkhani, Z., Biviano, A., Blot, L., Bolzonella, M., Breton, M. -., Carretero, J., Castander, F. J., Collaboration, E., Congedo, G., Crocce, M., Fosalba, P., Gaztanaga, E., Gonzalez, E. J., Gonzalez-Perez, V., Guzzo, L., Hirschmann, M., Hoekstra, H., Hoffmann, K., Huertas-Company, M., Joudaki, S., Kitching, T., Linke, L., Lucia, G. D., Mamon, G. A., Manera, M., Markovic, K., Mellier, Y., Miller, L., Monaco, P., Nadathur, S., Neissner, C., Nichol, R. C., Pardede, K., Percival, W. J., Pezzotta, A., Potter, D., Pourtsidou, A., Pozzetti, L., Scarlata, C., Schewtschenko, J. A., Stadel, J., Tallada-Crespí, P., Teyssier, R., Tutusaus, I., Viglione, C., Zhai, Z.

1 May 2025, In: Astronomy and Astrophysics. 697, 47p., A5

Analytical and EZmock covariance validation for the DESI 2024 results

Ahlen, S., Alves, O., Andrade, U., Bianchi, D., Brooks, D., Burtin, E., Chaussidon, E., Chen, X., Claybaugh, T., Cole, S., Ding, Z., Forero-Sánchez, D., Garcia-Quintero, C., Gaztañaga, E., Gil-Marín, H., Guillou, L. L., Gutierrez, G., Honscheid, K., Howlett, C., Kisner, T., Landriau, M., Levi, M., Macorra, A. d. l., Magana, M. V., Mattia, A. d., Mena-Fernández, J., Miquel, R., Moustakas, J., Nadathur, S., Palanque-Delabrouille, N., Percival, W., Pérez-Ràfols, I., Rashkovetskyi, M., Ross, A. J., Rossi, G., Sanchez, E., Schlegel, D., Schubnell, M., Seo, H., Sprayberry, D., Tarlé, G., Vargas, M. E., Weaver, B. A., Yu, J., Zarrouk, P., Zou, H.

17 Apr 2025, In: Journal of Cosmology and Astroparticle Physics, 27p., 055

DESI 2024 III: Baryon Acoustic Oscillations from Galaxies and Quasars

Adame, A. G., Aguilar, J., Ahlen, S., Alam, S., Alexander, D. M., Alvarez, M., Alves, O., Anand, A., Andrade, U., Armengaud, E., Avila, S., Aviles, A., Awan, H., Baltay, C., Bault, A., Behera, J., BenZvi, S., Beutler, F., Bianchi, D., Blake, C., Blum, R., Brieden, S., Brodzeller, A., Brooks, D., Buckley-Geer, E., Burtin, E., Calderon, R., Canning, R., Cereskaite, R., Cervantes-Cota, J. L., Chabanier, S., Chaussidon, E., Chaves-Montero, J., Collaboration, D., Findlay, N., Gaztañaga, E., Gil-Marín, H., Gonzalez-Perez, V., Gsponer, R., Howlett, C., Manera, M., Mueller, E., Nadathur, S., Percival, W. J., Pieri, M., Rosell, A. C., Ross, A. J., Ruggeri, R., Samushia, L., Wang, M. S.

7 Apr 2025, In: Journal of Cosmology and Astroparticle Physics. 04, April, 72p., 012

Euclid preparation: LXV. Determining the weak lensing mass accuracy and precision for galaxy clusters

Altieri, B., Amara, A., Andreon, S., Auricchio, N., Baccigalupi, C., Baldi, M., Bardelli, S., Baumont, L., Bellagamba, F., Bender, R., Bernardeau, F., Biviano, A., Bonino, D., Branchini, E., Brescia, M., Brinchmann, J., Camera, S., Capobianco, V., Carbone, C., Carretero, J., Casas, S., Castellano, M., Castignani, G., Cavuoti, S., Cimatti, A., Collaboration, E., Colodro-Conde, C., Congedo, G., Conselice, C. J., Conversi, L., Copin, Y., Courbin, F., Covone, G., Despali, G., Farrens, S., Gaztanaga, E., Giocoli, C., Ingoglia, L., Lesci, G. F., Markovic, K., Maturi, M., Maurogordato, S., Meneghetti, M., Moscardini, L., Murray, C., Nadathur, S., Percival, W. J., Radovich, M., Sereno, M., Vannier, M.

2 Apr 2025, In: Astronomy and Astrophysics. 695, 24p., A280

Euclid preparation: LXIII. Simulations and non-linearities beyond Lambda cold dark matter. 2. Results from non-standard simulations

Adame, A. G., Adamek, J., Aghanim, N., Altamura, E., Andreon, S., Avila, S., Baccigalupi, C., Baldi, M., Breton, M. -., Brun, A. M. C. L., Carbone, C., Carella, E., Casas, S., Collaboration, E., Corasaniti, P. -., Despali, G., Fiorini, B., García-Bellido, J., Gayoux, T., Gaztanaga, E., Giocoli, C., Gonzalez-Perez, V., Hamaus, N., Hassani, F., Hernández-Aguayo, C., Kiessling, A., Koyama, K., Kunz, M., Li, B., Marinucci, M., Markovic, K., Moretti, C., Mota, D. F., Nadathur, S., Pardede, K., Percival, W. J., Piga, L., Pisani, A., Pizzuti, L., Pourtsidou, A., Ragagnin, A., Rasera, Y., Rácz, G., Sakr, Z., Szapudi, I., Tallada-Crespí, P., Vernizzi, F., Verza, G., Winther, H. -., Yepes, G.

27 Mar 2025, In: Astronomy and Astrophysics. 695, 22p., A232

Euclid preparation: LXII. Simulations and non-linearities beyond Lambda cold dark matter. 1. Numerical methods and validation

Adamek, J., Altamura, E., Amara, A., Andreon, S., Auricchio, N., Baccigalupi, C., Baldi, M., Bardelli, S., Battaglia, P., Bonino, D., Branchini, E., Brando, G., Brescia, M., Breton, M. -., Brinchmann, J., Brun, A. M. C. L., Caillat, A., Camera, S., Capobianco, V., Carbone, C., Cardone, V. F., Carretero, J., Casalino, A., Casas, S., Castander, F. J., Castellano, M., Castignani, G., Cavuoti, S., Cimatti, A., Collaboration, E., Colodro-Conde, C., Congedo, G., Fiorini, B., Gaztanaga, E., Giocoli, C., Hassani, F., Hernández-Aguayo, C., Joudaki, S., Koyama, K., Li, B., Markovic, K., Mota, D. F., Nadathur, S., Percival, W. J., Potter, D., Pourtsidou, A., Rácz, G., Sakr, Z., Vernizzi, F., Winther, H. -.

26 Mar 2025, In: Astronomy and Astrophysics. 695, 21p., A230

View all my research outputs

Dr Seshadri Nadathur

Summary

Research interests

Research outputs

2025