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

2024

Euclid preparation. LIII. LensMC, weak lensing cosmic shear measurement with forward modelling and Markov Chain Monte Carlo sampling

Aghanim, N., Amara, A., Andreon, S., Auricchio, N., Baldi, M., Bardelli, S., Bender, R., Bodendorf, C., Bonino, D., Branchini, E., Brescia, M., Brinchmann, J., Camera, S., Capobianco, V., Carbone, C., Cardone, V. F., Carretero, J., Casas, S., Castander, F. J., Castellano, M., Cavuoti, S., Cimatti, A., Collaboration, E., Congedo, G., Conselice, C. J., Conversi, L., Copin, Y., Courbin, F., Courtois, H. M., Cropper, M., Cross, N., Degaudenzi, H., Dinis, J., Dubath, F., Dupac, X., Gaztanaga, E., Giorgio, A. M. D., Joudaki, S., Kitching, T., Markovic, K., Martinet, N., Matthew, S., Miller, L., Nadathur, S., Percival, W. J., Schewtschenko, J. A., Schrabback, T., Silva, A. D., Tewes, M., Welikala, N.

25 Nov 2024, In: Astronomy and Astrophysics. 691, 28p., A319

Euclid preparation: L. Calibration of the linear halo bias in Λ(ν)CDM cosmologies

Aghanim, N., Amendola, L., Andreon, S., Angulo, R. E., Baccigalupi, C., Baldi, M., Bocquet, S., Bodendorf, C., Bonino, D., Borgani, S., Branchini, E., Brescia, M., Caillat, A., Camera, S., Capobianco, V., Carbone, C., Carretero, J., Casas, S., Castellano, M., Castignani, G., Castro, T., Cavuoti, S., Cimatti, A., Collaboration, E., Colodro-Conde, C., Congedo, G., Conselice, C. J., Conversi, L., Copin, Y., Costanzi, M., Costille, A., Courbin, F., Courtois, H. M., Dakin, J., Degaudenzi, H., Dolag, K., Douspis, M., Dupac, X., Dusini, S., Fumagalli, A., Gaztanaga, E., Giorgio, A. M. D., Lucia, G. D., Markovic, K., Monaco, P., Nadathur, S., Percival, W. J., Saro, A., Sefusatti, E., Silva, A. D.

1 Nov 2024, In: Astronomy and Astrophysics. 691, 20p., A62

Alcock-Paczyński effect on void-finding: Implications for void-galaxy cross-correlation modelling

Fraser, T. S., Massara, E., Nadathur, S., Paillas, E., Percival, W. J., Radinović, S., Winther, H. A., Woodfinden, A.

29 Oct 2024, In: Astronomy and Astrophysics. 691, 19p., A39

Euclid preparation. XLIX. Selecting active galactic nuclei using observed colours

Aghanim, N., Allevato, V., Amara, A., Andreon, S., Auricchio, N., Baldi, M., Bardelli, S., Battaglia, P., Bender, R., Bisigello, L., Bolzonella, M., Bonino, D., Branchini, E., Brau-Nogue, S., Brescia, M., Camera, S., Capobianco, V., Carbone, C., Carretero, J., Casas, S., Charlot, S., Collaboration, E., Cunha, P. A. C., Feltre, A., Fotopoulou, S., Franca, F. L., Gabarra, L., Gruppioni, C., Humphrey, A., Landt, H., Mannucci, F., Markovic, K., Massimo, M., Nadathur, S., Percival, W. J., Pozzetti, L., Prandoni, I., Radovich, M., Ricci, F., Rodighiero, G., Salvato, M., Serjeant, S., Shankar, F., Spinoglio, L., Stern, D., Tortora, C., Vergani, D., Vignali, C., Yung, L. Y. A., Zamorani, G.

25 Oct 2024, In: Astronomy and Astrophysics. 691, 24p.

DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations

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., Bahr-Kalus, B., Baltay, C., Bault, A., Behera, J., BenZvi, S., Bera, A., 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., Chen, S., Chen, X., Claybaugh, T., Cole, S., Collaboration, D., Findlay, N. T. B., Gaztanaga, E., Gonzalez-Perez, V., Gsponer, R., Mueller, E., Nadathur, S., Percival, W. J., Pieri, M., Rosell, A. C., Ruggeri, R., Samushia, L., Wang, M. S.

18 Oct 2024, In: Journal of Cosmology and Astroparticle Physics

Euclid preparation: sensitivity to neutrino parameters

Amara, A., Andreon, S., Archidiacono, M., Auricchio, N., Baldi, M., Bardelli, S., Bodendorf, C., Bonino, D., Branchini, E., Brescia, M., Brinchmann, J., Camera, S., Capobianco, V., Carbone, C., Cardone, V. F., Carretero, J., Casas, S., Castellano, M., Cavuoti, S., Cimatti, A., Clesse, S., Collaboration, E., Congedo, G., Conselice, C. J., Conversi, L., Copin, Y., Costanzi, M., Courbin, F., Courtois, H. M., Degaudenzi, H., Douspis, M., Dubath, F., Frusciante, N., Fumagalli, A., Gaztanaga, E., Lesgourgues, J., Markovic, K., Monaco, P., Nadathur, S., Pace, F., Pamuk, S., Parimbelli, G., Percival, W. J., Peters, F. H., Sabarish, V. M., Sakr, Z., Schneider, A., Schöneberg, N., Silva, A. D., Viel, M.

14 Oct 2024, In: Astronomy and Astrophysics

Euclid preparation: XLVIII. The pre-launch Science Ground Segment simulation framework

Aghanim, N., Altieri, B., Amara, A., Andreon, S., Auphan, T., Auricchio, N., Aussel, H., Benielli, D., Boucaud, A., Bretonniere, H., Carretero, J., Casas, R., Casenove, P., Castander, F. J., Clement, B., Collaboration, E., Ealet, A., Fahed, R., Fourmanoit, N., Gaztanaga, E., George, K., Hudelot, P., Huot, S., Jullo, E., Kara, A., Keihanen, E., Kermiche, S., Kiiveri, K., Kummel, M., Kurki-Suonio, H., Laugier, D., Mainetti, G., Markovic, K., Mohr, J. J., Montoro, A., Nadathur, S., Neissner, C., Okumura, K., Percival, W. J., Pollack, J. E., Schirmer, M., Seidel, G., Serrano, S., Tallada-Crespi, P., Tonello, N., Torradeflot, F., Venhola, A., Verderi, A., Zacchei, A., Zoubian, J.

3 Oct 2024, In: Astronomy and Astrophysics. 690, 38p., A103

Euclid preparation. XLVII. Improving cosmological constraints using a new multi-tracer method with the spectroscopic and photometric samples

Amara, A., Andreon, S., Auricchio, N., Aussel, H., Baldi, M., Bardelli, S., Blanchard, A., Bodendorf, C., Bonino, D., Branchini, E., Brau-Nogue, S., Brescia, M., Brinchmann, J., Camera, S., Capobianco, V., Carretero, J., Casas, S., Castellano, M., Cavuoti, S., Cimatti, A., Collaboration, E., Congedo, G., Conselice, C. J., Conversi, L., Copin, Y., Courbin, F., Courtois, H. M., Degaudenzi, H., Dinis, J., Dournac, F., Douspis, M., Dubath, F., Dupac, X., Dusini, S., Ealet, A., Farina, M., Farrens, S., Ferriol, S., Frailis, M., Franceschi, E., Gaztanaga, E., Giorgio, A. M. D., Ilić, S., Lamine, B., Markovic, K., Nadathur, S., Percival, W. J., Schewtschenko, J. A., Silva, A. D., Tutusaus, I.

1 Oct 2024, In: Astronomy and Astrophysics. 690, 16p., A30

Euclid preparation. LII. Forecast impact of super-sample covariance on 3x2pt analysis with Euclid

Aghanim, N., Amara, A., Andreon, S., Aubert, M., Auricchio, N., Baldi, M., Baratta, P., Bardelli, S., Barreira, A., Beauchamps, S. G., Bonici, M., Bonino, D., Branchini, E., Brescia, M., Brinchmann, J., Camera, S., Capobianco, V., Carbone, C., Cardone, V. F., Carretero, J., Casas, S., Castander, F. J., Castellano, M., Cavuoti, S., Cimatti, A., Cledassou, R., Collaboration, E., Congedo, G., Conselice, C. J., Conversi, L., Copin, Y., Corcione, L., Courbin, F., Courtois, H. M., Escoffier, S., Gaztanaga, E., Gorce, A., Ilić, S., Lacasa, F., Maoli, R., Markovic, K., Martinelli, M., Nadathur, S., Pourtsidou, A., Sakr, Z., Scaramella, R., Schneider, A., Sciotti, D., Tutusaus, I., Upham, R. E.

27 Sep 2024, In: Astronomy and Astrophysics

Euclid preparation. XLIV. Modelling spectroscopic clustering on mildly nonlinear scales in beyond-ΛCDM models

Aghanim, N., Amara, A., Andreon, S., Auricchio, N., Baldi, M., Bardelli, S., Bella, L. F. d. l., Bodendorf, C., Bonino, D., Bose, B., Branchini, E., Brescia, M., Brinchmann, J., Camera, S., Capobianco, V., Carbone, C., Cardone, V. F., Carella, E., Carretero, J., Carrilho, P., Casas, S., Castellano, M., Cavuoti, S., Cimatti, A., Collaboration, E., Congedo, G., Conselice, C. J., Conversi, L., Copin, Y., Costille, A., Courbin, F., Courtois, H. M., D'Amico, G., Fiorini, B., Frusciante, N., Giocoli, C., Joudaki, S., Koyama, K., Lombriser, L., Marinucci, M., Markovic, K., Moretti, C., Nadathur, S., Pace, F., Percival, W. J., Pietroni, M., Piga, L., Pourtsidou, A., Silva, A. D., Vernizzi, F.

24 Sep 2024, In: Astronomy and Astrophysics. 689, 29p., A275

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Dr Seshadri Nadathur

Summary

Research interests

Research outputs

2024