All Outputs (23)

Wavelength dependences of the optical/UV and X-ray luminosity correlations of quasars (2023)
Journal Article
Ward, M., Done, C., Jin, C., Lusso, E., & Middei, R. (2024). Wavelength dependences of the optical/UV and X-ray luminosity correlations of quasars. Monthly Notices of the Royal Astronomical Society, 527(1), 356–373. https://doi.org/10.1093/mnras/stad3193

The interband correlations between optical/ultraviolet (UV) and X-ray luminosities of active galactic nuclei (AGNs) are important for understanding the disc–coronal connection, as well as using AGN as standard candles for cosmology. It is convention... Read More about Wavelength dependences of the optical/UV and X-ray luminosity correlations of quasars.

The SOUX AGN sample: optical/UV/X-ray SEDs and the nature of the disc (2023)
Journal Article
Mitchell, J. A. J., Done, C., Ward, M. J., Kynoch, D., Hagen, S., Lusso, E., & Landt, H. (2023). The SOUX AGN sample: optical/UV/X-ray SEDs and the nature of the disc. Monthly Notices of the Royal Astronomical Society, 524(2), 1796-1825. https://doi.org/10.1093/mnras/stad1830

We use the SOUX sample of ∼700 active galactic nucleus (AGN) to form average optical-ultraviolet (UV)-X-rays spectral energy distributions (SEDs) on a two-dimensional (2D) grid of MBH and L2500. We compare these with the predictions of a new AGN SED... Read More about The SOUX AGN sample: optical/UV/X-ray SEDs and the nature of the disc.

Fundamental differences in the radio properties of red and blue quasars: enhanced compact AGN emission in red quasars (2020)
Journal Article
Fawcett, V., Alexander, D., Rosario, D., Klindt, L., Fotopoulou, S., Lusso, E., …Calistro Rivera, G. (2020). Fundamental differences in the radio properties of red and blue quasars: enhanced compact AGN emission in red quasars. Monthly Notices of the Royal Astronomical Society, 494(4), 4802-4818. https://doi.org/10.1093/mnras/staa954

We have recently used the Faint Images of the Radio Sky at Twenty-centimeters (FIRST) survey to show that red quasars have fundamentally different radio properties to typical blue quasars: a significant (factor ≈3) enhancement in the radio-detection... Read More about Fundamental differences in the radio properties of red and blue quasars: enhanced compact AGN emission in red quasars.

The Quest for Dual and Binary Supermassive Black Holes: A Multi-Messenger View (2019)
Journal Article
Rosa, A. D., Vignali, C., Bogdanović, T., Capelo, P. R., Charisi, M., Dotti, M., …Volonteri, M. (2019). The Quest for Dual and Binary Supermassive Black Holes: A Multi-Messenger View. New Astronomy Reviews, 86, Article 101525. https://doi.org/10.1016/j.newar.2020.101525

The quest for binary and dual supermassive black holes (SMBHs) at the dawn of the multi-messenger era is compelling. Detecting dual active galactic nuclei (AGN) – active SMBHs at projected separations larger than several parsecs – and binary AGN – pr... Read More about The Quest for Dual and Binary Supermassive Black Holes: A Multi-Messenger View.

Quasars as standard candles II (2019)
Journal Article
Salvestrini, F., Risaliti, G., Bisogni, S., Lusso, E., & Vignali, C. (2019). Quasars as standard candles II. Astronomy & Astrophysics, 631, Article A120. https://doi.org/10.1051/0004-6361/201935491

A tight non-linear relation between the X-ray and the optical-ultraviolet (UV) emission has been observed in active galactic nuclei (AGN) over a wide range of redshift and several orders of magnitude in luminosity, suggesting the existence of an ubiq... Read More about Quasars as standard candles II.

Fundamental differences in the radio properties of red and blue quasars: evolution strongly favoured over orientation (2019)
Journal Article
Klindt, L., Alexander, D., Rosario, D., Lusso, E., & Fotopoulou, S. (2019). Fundamental differences in the radio properties of red and blue quasars: evolution strongly favoured over orientation. Monthly Notices of the Royal Astronomical Society, 488(3), 3109-3128. https://doi.org/10.1093/mnras/stz1771

A minority of the optically selected quasar population are red at optical wavelengths due to the presence of dust along the line of sight. A key focus of many red quasar studies is to understand their relationship with the overall quasar population:... Read More about Fundamental differences in the radio properties of red and blue quasars: evolution strongly favoured over orientation.

The Composite Nature of Dust-obscured Galaxies (DOGs) at z ∼ 2–3 in the COSMOS Field. II. The AGN Fraction (2019)
Journal Article
Riguccini, L. A., Treister, E., Menéndez-Delmestre, K., Cardamone, C., Civano, F., Gonçalves, T. S., …Suh, H. (2019). The Composite Nature of Dust-obscured Galaxies (DOGs) at z ∼ 2–3 in the COSMOS Field. II. The AGN Fraction. Astronomical Journal, 157(6), Article 233. https://doi.org/10.3847/1538-3881/ab16cd

We present the X-ray properties of 108 Dust-Obscured Galaxies (DOGs; F 24 μm/F R > 1000) in the COSMOS field, all of which are detected in at least three far-infrared bands with the Herschel Observatory. Out of the entire sample, 22 are individually... Read More about The Composite Nature of Dust-obscured Galaxies (DOGs) at z ∼ 2–3 in the COSMOS Field. II. The AGN Fraction.

Multi-wavelength Properties of Type 1 and Type 2 AGN Host Galaxies in the Chandra-COSMOS Legacy Survey (2019)
Journal Article
Suh, H., Civano, F., Hasinger, G., Lusso, E., Marchesi, S., Schulze, A., …Sanders, D. B. (2019). Multi-wavelength Properties of Type 1 and Type 2 AGN Host Galaxies in the Chandra-COSMOS Legacy Survey. Astrophysical Journal, 872(2), Article 168. https://doi.org/10.3847/1538-4357/ab01fb

We investigate the multi-wavelength properties of host galaxies of 3701 X-ray-selected active galactic nuclei (AGNs) out to z ~ 5 in the Chandra-COSMOS Legacy Survey. Thanks to the extensive multi-wavelength photometry available in the COSMOS field,... Read More about Multi-wavelength Properties of Type 1 and Type 2 AGN Host Galaxies in the Chandra-COSMOS Legacy Survey.

Orientation effects on the near-infrared broad-band emission of quasars (2019)
Journal Article
Bisogni, S., Lusso, E., Marconi, A., & Risaliti, G. (2019). Orientation effects on the near-infrared broad-band emission of quasars. Monthly Notices of the Royal Astronomical Society, 485(1), 1405-1411. https://doi.org/10.1093/mnras/stz495

We recently proposed the equivalent width (EW) of the narrow [O III]5007 Å emission line as an orientation indicator for active galactic nuclei. We tested this method on about 12 300 optically selected broad-line quasars from the SDSS seventh Data Re... Read More about Orientation effects on the near-infrared broad-band emission of quasars.

Molecular gas content in obscured AGN at z > 1 (2018)
Journal Article
Perna, M., Sargent, M., Brusa, M., Daddi, E., Feruglio, C., Cresci, G., …Vignali, C. (2018). Molecular gas content in obscured AGN at z > 1. Astronomy & Astrophysics, 619, Article A90. https://doi.org/10.1051/0004-6361/201833040

Aims. The standard active galactic nuclei (AGN)-galaxy co-evolutionary scenario predicts a phase of deeply “buried” supermassive black hole growth coexisting with a starburst (SB) before feedback phenomena deplete the cold molecular gas reservoir of... Read More about Molecular gas content in obscured AGN at z > 1.

Towards an informed quest for accretion disc winds in quasars: the intriguing case of Ton 28 (2018)
Journal Article
Nardini, E., Lusso, E., & Bisogni, S. (2019). Towards an informed quest for accretion disc winds in quasars: the intriguing case of Ton 28. Monthly Notices of the Royal Astronomical Society: Letters, 482(1), L134-L138. https://doi.org/10.1093/mnrasl/sly204

We report on the detection of a blueshifted Fe K absorption feature in two consecutive XMM–Newton  observations of the luminous blue quasar Ton 28, at the 4σ cumulative significance. The rest energy of 9.2 keV implies the presence of an accretion dis... Read More about Towards an informed quest for accretion disc winds in quasars: the intriguing case of Ton 28.

QSO MUSEUM I: a sample of 61 extended Ly α-emission nebulae surrounding z ∼ 3 quasars (2018)
Journal Article
Arrigoni Battaia, F., Hennawi, J. F., Prochaska, J. X., Oñorbe, J., Farina, E. P., Cantalupo, S., & Lusso, E. (2019). QSO MUSEUM I: a sample of 61 extended Ly α-emission nebulae surrounding z ∼ 3 quasars. Monthly Notices of the Royal Astronomical Society, 482(3), 3162-3205. https://doi.org/10.1093/mnras/sty2827

Motivated by the discovery of rare enormous Lyman α nebulae (ELAN) around z ∼ 2 quasars, we initiated a long-term campaign with the MUSE/VLT instrument to directly uncover the astrophysics of the gas around quasars. We present here the first 61 targe... Read More about QSO MUSEUM I: a sample of 61 extended Ly α-emission nebulae surrounding z ∼ 3 quasars.

The Spectral and Environment Properties of z ∼ 2.0–2.5 Quasar Pairs (2018)
Journal Article
Lusso, E., Fumagalli, M., Rafelski, M., Neeleman, M., Prochaska, J. X., Hennawi, J. F., …Theuns, T. (2018). The Spectral and Environment Properties of z ∼ 2.0–2.5 Quasar Pairs. Astrophysical Journal, 860(1), Article 41. https://doi.org/10.3847/1538-4357/aac514

We present the first results from our survey of intervening and proximate Lyman limit systems (LLSs) at z ~ 2.0–2.5 using the Wide Field Camera 3 on board the Hubble Space Telescope. The quasars in our sample are projected pairs with proper transvers... Read More about The Spectral and Environment Properties of z ∼ 2.0–2.5 Quasar Pairs.

X-Ray Properties of AGN in Brightest Cluster Galaxies. I. A Systematic Study of the Chandra Archive in the 0.2 < z < 0.3 and 0.55 < z < 0.75 Redshift Range (2018)
Journal Article
Yang, L., Tozzi, P., Yu, H., Lusso, E., Gaspari, M., Gilli, R., …Risaliti, G. (2018). X-Ray Properties of AGN in Brightest Cluster Galaxies. I. A Systematic Study of the Chandra Archive in the 0.2 < z < 0.3 and 0.55 < z < 0.75 Redshift Range. Astrophysical Journal, 859(1), Article 65. https://doi.org/10.3847/1538-4357/aabfd7

We present a search for nuclear X-ray emission in the brightest cluster galaxies (BCGs) of a sample of groups and clusters of galaxies extracted from the Chandra archive. The exquisite angular resolution of Chandra allows us to obtain robust photomet... Read More about X-Ray Properties of AGN in Brightest Cluster Galaxies. I. A Systematic Study of the Chandra Archive in the 0.2 < z < 0.3 and 0.55 < z < 0.75 Redshift Range.

Molecular outflow and feedback in the obscured quasar XID2028 revealed by ALMA (2018)
Journal Article
Brusa, M., Cresci, G., Daddi, E., Paladino, R., Perna, M., Bongiorno, A., …Bonaglia, M. (2018). Molecular outflow and feedback in the obscured quasar XID2028 revealed by ALMA. Astronomy & Astrophysics, 612, Article A29. https://doi.org/10.1051/0004-6361/201731641

We imaged, with ALMA and ARGOS/LUCI, the molecular gas and dust and stellar continuum in XID2028, which is an obscured quasi-stellar object (QSO) at z = 1.593, where the presence of a massive outflow in the ionised gas component traced by the [OIII]5... Read More about Molecular outflow and feedback in the obscured quasar XID2028 revealed by ALMA.

A Hubble Diagram for Quasars (2018)
Journal Article
Bisogni, S., Risaliti, G., & Lusso, E. (2018). A Hubble Diagram for Quasars. Frontiers in Astronomy and Space Sciences, 4, Article 68. https://doi.org/10.3389/fspas.2017.00068

The cosmological model is at present not tested between the redshift of the farthest observed supernovae (z ~ 1.4) and that of the Cosmic Microwave Background (z ~ 1,100). Here we introduce a new method to measure the cosmological parameters: we show... Read More about A Hubble Diagram for Quasars.

The Physical Relation between Disc and Coronal Emission in Quasars (2018)
Journal Article
Lusso, E., & Risaliti, G. (2018). The Physical Relation between Disc and Coronal Emission in Quasars. Frontiers in Astronomy and Space Sciences, 4, Article 66. https://doi.org/10.3389/fspas.2017.00066

We propose a modified version of the observed non-linear relation between the X-ray (2 keV) and the ultraviolet (2,500 Å) emission in quasars (i.e., LX∝LγUV) which involves the full width at half-maximum, FWHM, of the broad emission line, i.e., LX∝Lγ... Read More about The Physical Relation between Disc and Coronal Emission in Quasars.

EW[OIII] as an Orientation Indicator for Quasars: Implications for the Torus (2017)
Journal Article
Bisogni, S., Marconi, A., Risaliti, G., & Lusso, E. (2017). EW[OIII] as an Orientation Indicator for Quasars: Implications for the Torus. Frontiers in Astronomy and Space Sciences, 4, Article 48. https://doi.org/10.3389/fspas.2017.00048

We present an analysis of the average spectral properties of 12,000 SDSS quasars as a function of accretion disc inclination, as measured from the equivalent width of the [OIII] 5007Å line. The use of this indicator on a large sample of quasars from... Read More about EW[OIII] as an Orientation Indicator for Quasars: Implications for the Torus.

Quasars as standard candles (2017)
Journal Article
Lusso, E., & Risaliti, G. (2017). Quasars as standard candles. Astronomy & Astrophysics, 602, Article A79. https://doi.org/10.1051/0004-6361/201630079

Context. A tight non-linear relation exists between the X-ray and UV emission in quasars (i.e. LX ∝LUVγ), with a dispersion of ~0.2 dex over approximately three orders of magnitude in luminosity. Such observational evidence has two relevant consequen... Read More about Quasars as standard candles.

Type 2 AGN Host Galaxies in the Chandra-COSMOS Legacy Survey: No Evidence of AGN-driven Quenching (2017)
Journal Article
Suh, H., Civano, F., Hasinger, G., Lusso, E., Lanzuisi, G., Marchesi, S., …Vignali, C. (2017). Type 2 AGN Host Galaxies in the Chandra-COSMOS Legacy Survey: No Evidence of AGN-driven Quenching. Astrophysical Journal, 841(2), Article 102. https://doi.org/10.3847/1538-4357/aa725c

We investigate the star formation properties of a large sample of ~2300 X-ray-selected Type 2 Active Galactic Nuclei (AGNs) host galaxies out to $z\sim 3$ in the Chandra COSMOS Legacy Survey in order to understand the connection between the star form... Read More about Type 2 AGN Host Galaxies in the Chandra-COSMOS Legacy Survey: No Evidence of AGN-driven Quenching.