The evolution of obscured AGN across cosmic time -- A large quasar survey for the 2040s

Tanya Urrutia; Darshan Kakkad; Paula Sánchez-Sáez; Mojtaba Raouf; Swayamtrupta Panda; Sarah E. I. Bosman; Francisco Pozo Nunez; Annagrazia Puglisi; Sophia Flury; Dragana Ilic; Andjelka B. Kovacevic; Mamta Pandey-Pommier; Giustina Vietri; Sarath Satheesh-Sheeba; Francesco Salvestrini; Susanna Bisogni; Eduardo Bañados; Ana Monreal Ibero; Sabine Thater; Pratika Dayal; Filippo D'Ammando; José Afonso; Paramita Barai; Valentin Ivanov

The evolution of obscured AGN across cosmic time -- A large quasar survey for the 2040s

Tanya Urrutia
, Darshan Kakkad
, Paula Sánchez-Sáez
, Mojtaba Raouf
, Swayamtrupta Panda
, Sarah E. I. Bosman
, Francisco Pozo Nunez
, Annagrazia Puglisi
, Sophia Flury
, Dragana Ilic
, Andjelka B. Kovacevic
, Mamta Pandey-Pommier
, Giustina Vietri
, Sarath Satheesh-Sheeba
, Francesco Salvestrini
, Susanna Bisogni
, Eduardo Bañados
, Ana Monreal Ibero
, Sabine Thater
, Pratika Dayal

Filippo D'Ammando, José Afonso, Paramita Barai, Valentin Ivanov

Research output: Other contribution

Abstract

We propose a large quasar demographic optical multi-object spectroscopic (MOS) survey targeting over 50 million AGN candidates up to the highest redshifts possible in the optical (z~6.5), with repeat visits, using a variety of selection criteria available by 2040. A large MOS survey combining all AGN selection methods is the only way to unify a diverse range of different obscured AGN populations within a single, variability- and spectroscopy-based framework, rather than as disjoint classes selected by different methods.

Original language	Undefined/Unknown
Publication status	Published - 20 Dec 2025

Keywords

astro-ph.GA

Access to Document

2512.18421v1

Cite this

Urrutia, T., Kakkad, D., Sánchez-Sáez, P., Raouf, M., Panda, S., Bosman, S. E. I., Nunez, F. P., Puglisi, A., Flury, S., Ilic, D., Kovacevic, A. B., Pandey-Pommier, M., Vietri, G., Satheesh-Sheeba, S., Salvestrini, F., Bisogni, S., Bañados, E., Ibero, A. M., Thater, S., ... Ivanov, V. (2025, Dec 20). The evolution of obscured AGN across cosmic time -- A large quasar survey for the 2040s.

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title = "The evolution of obscured AGN across cosmic time -- A large quasar survey for the 2040s",

abstract = "We propose a large quasar demographic optical multi-object spectroscopic (MOS) survey targeting over 50 million AGN candidates up to the highest redshifts possible in the optical (z\textasciitilde{}6.5), with repeat visits, using a variety of selection criteria available by 2040. A large MOS survey combining all AGN selection methods is the only way to unify a diverse range of different obscured AGN populations within a single, variability- and spectroscopy-based framework, rather than as disjoint classes selected by different methods.",

keywords = "astro-ph.GA",

author = "Tanya Urrutia and Darshan Kakkad and Paula S{\'a}nchez-S{\'a}ez and Mojtaba Raouf and Swayamtrupta Panda and Bosman, \{Sarah E. I.\} and Nunez, \{Francisco Pozo\} and Annagrazia Puglisi and Sophia Flury and Dragana Ilic and Kovacevic, \{Andjelka B.\} and Mamta Pandey-Pommier and Giustina Vietri and Sarath Satheesh-Sheeba and Francesco Salvestrini and Susanna Bisogni and Eduardo Ba{\~n}ados and Ibero, \{Ana Monreal\} and Sabine Thater and Pratika Dayal and Filippo D'Ammando and Jos{\'e} Afonso and Paramita Barai and Valentin Ivanov",

note = "White paper in response to ESO's {"}Expanding Horizons{"} call",

year = "2025",

month = dec,

day = "20",

language = "Undefined/Unknown",

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Urrutia, T, Kakkad, D, Sánchez-Sáez, P, Raouf, M, Panda, S, Bosman, SEI, Nunez, FP, Puglisi, A, Flury, S, Ilic, D, Kovacevic, AB, Pandey-Pommier, M, Vietri, G, Satheesh-Sheeba, S, Salvestrini, F, Bisogni, S, Bañados, E, Ibero, AM, Thater, S, Dayal, P, D'Ammando, F, Afonso, J, Barai, P & Ivanov, V 2025, The evolution of obscured AGN across cosmic time -- A large quasar survey for the 2040s.

TY - GEN

T1 - The evolution of obscured AGN across cosmic time -- A large quasar survey for the 2040s

AU - Urrutia, Tanya

AU - Kakkad, Darshan

AU - Sánchez-Sáez, Paula

AU - Raouf, Mojtaba

AU - Panda, Swayamtrupta

AU - Bosman, Sarah E. I.

AU - Nunez, Francisco Pozo

AU - Puglisi, Annagrazia

AU - Flury, Sophia

AU - Ilic, Dragana

AU - Kovacevic, Andjelka B.

AU - Pandey-Pommier, Mamta

AU - Vietri, Giustina

AU - Satheesh-Sheeba, Sarath

AU - Salvestrini, Francesco

AU - Bisogni, Susanna

AU - Bañados, Eduardo

AU - Ibero, Ana Monreal

AU - Thater, Sabine

AU - Dayal, Pratika

AU - D'Ammando, Filippo

AU - Afonso, José

AU - Barai, Paramita

AU - Ivanov, Valentin

N1 - White paper in response to ESO's "Expanding Horizons" call

PY - 2025/12/20

Y1 - 2025/12/20

N2 - We propose a large quasar demographic optical multi-object spectroscopic (MOS) survey targeting over 50 million AGN candidates up to the highest redshifts possible in the optical (z~6.5), with repeat visits, using a variety of selection criteria available by 2040. A large MOS survey combining all AGN selection methods is the only way to unify a diverse range of different obscured AGN populations within a single, variability- and spectroscopy-based framework, rather than as disjoint classes selected by different methods.

AB - We propose a large quasar demographic optical multi-object spectroscopic (MOS) survey targeting over 50 million AGN candidates up to the highest redshifts possible in the optical (z~6.5), with repeat visits, using a variety of selection criteria available by 2040. A large MOS survey combining all AGN selection methods is the only way to unify a diverse range of different obscured AGN populations within a single, variability- and spectroscopy-based framework, rather than as disjoint classes selected by different methods.

KW - astro-ph.GA

M3 - Other contribution

ER -