Fundamental differences in the radio properties of red and blue quasars: evolution strongly favoured over orientation

Klindt, L; Alexander, DM; Rosario, DJ; Lusso, E; Fotopoulou, S

doi:10.1093/mnras/stz1771

All Outputs (9)

The NuSTAR Serendipitous Survey: The 80 Month Catalog and Source Properties of the High-energy Emitting Active Galactic Nucleus and Quasar Population (2024)
Journal Article
Klindt, L., Lansbury, G. B., Rosario, D. J., Alexander, D. M., Aird, J., Stern, D., Forster, K., Koss, M. J., Greenwell, C. L., Bauer, F. E., Ricci, C., Tomsick, J., Brandt, W. N., Connor, T., Boorman, P. G., Annuar, A., Ballantyne, D. R., Chen, C.-T., Civano, F., Comastri, A., …van Soelen, B. (2024). The NuSTAR Serendipitous Survey: The 80 Month Catalog and Source Properties of the High-energy Emitting Active Galactic Nucleus and Quasar Population. Astrophysical Journal Supplement, 273(2), Article 20. https://doi.org/10.3847/1538-4365/ad4a71

We present a catalog of hard X-ray serendipitous sources detected in the first 80 months of observations by the Nuclear Spectroscopic Telescope Array (NuSTAR). The NuSTAR serendipitous survey 80 month (NSS80) catalog has an unprecedented ∼62 Ms of ef... Read More about The NuSTAR Serendipitous Survey: The 80 Month Catalog and Source Properties of the High-energy Emitting Active Galactic Nucleus and Quasar Population.

Fundamental differences in the properties of red and blue quasars: measuring the reddening and accretion properties with X-shooter (2022)
Journal Article
Fawcett, V., Alexander, D., Rosario, D., Klindt, L., Lusso, E., Morabito, L., & Calistro Rivera, G. (2022). Fundamental differences in the properties of red and blue quasars: measuring the reddening and accretion properties with X-shooter. Monthly Notices of the Royal Astronomical Society, 513(1), 1254-1274. https://doi.org/10.1093/mnras/stac945

We have recently found fundamental differences in the radio properties of red quasars when compared to typical blue quasars. In this paper, we use data from the X-shooter spectrograph on the Very Large Telescope, providing spectral coverage from ∼300... Read More about Fundamental differences in the properties of red and blue quasars: measuring the reddening and accretion properties with X-shooter.

Host Dark Matter Halos of SDSS Red and Blue Quasars: No Significant Difference in Large-scale Environment (2022)
Journal Article
Petter, G. C., Hickox, R. C., Alexander, D. M., Geach, J. E., Myers, A. D., Rosario, D. J., Fawcett, V. A., Klindt, L., & Whalen, K. E. (2022). Host Dark Matter Halos of SDSS Red and Blue Quasars: No Significant Difference in Large-scale Environment. Astrophysical Journal, 927(1), Article 16. https://doi.org/10.3847/1538-4357/ac4d31

The observed optical colors of quasars are generally interpreted in one of two frameworks: unified models that attribute the color to the random orientation of the accretion disk along the line of sight, and evolutionary models that invoke connection... Read More about Host Dark Matter Halos of SDSS Red and Blue Quasars: No Significant Difference in Large-scale Environment.

How Are Red and Blue Quasars Different? The Radio Properties (2021)
Journal Article
Fawcett, V. A., Alexander, D. M., Rosario, D. J., & Klindt, L. (2021). How Are Red and Blue Quasars Different? The Radio Properties. Galaxies, 9(4), Article 107. https://doi.org/10.3390/galaxies9040107

A non-negligible fraction of quasars are red at optical wavelengths, indicating (in the majority of cases) that the accretion disc is obscured by a column of dust which extinguishes the shorter-wavelength blue emission. In this paper, we summarize re... Read More about How Are Red and Blue Quasars Different? The Radio Properties.

Fundamental differences in the radio properties of red and blue quasars: kiloparsec-scale structures revealed by e-MERLIN (2021)
Journal Article
Rosario, D., Alexander, D., Moldon, J., Klindt, L., Thomson, A., Morabito, L., Fawcett, V., & Harrison, C. (2021). Fundamental differences in the radio properties of red and blue quasars: kiloparsec-scale structures revealed by e-MERLIN. Monthly Notices of the Royal Astronomical Society, 505(4), 5283-5300. https://doi.org/10.1093/mnras/stab1653

Red quasi-stellar objects (QSOs) are a subset of the quasar population with colours consistent with reddening due to intervening dust. Recent work has demonstrated that red QSOs show special radio properties that fundamentally distinguish them from n... Read More about Fundamental differences in the radio properties of red and blue quasars: kiloparsec-scale structures revealed by e-MERLIN.

The multiwavelength properties of red QSOs -- Evidence for dusty winds as the origin of QSO reddening (2021)
Journal Article
Calistro Rivera, G., Alexander, D., Rosario, D., Harrison, C., Stalevski, M., Rakshit, S., Fawcett, V., Morabito, L., Klindt, L., Best, P., Bonato, M., Bowler, R., Costa, T., & Kondapally, R. (2021). The multiwavelength properties of red QSOs -- Evidence for dusty winds as the origin of QSO reddening. Astronomy & Astrophysics, 649, Article A102. https://doi.org/10.1051/0004-6361/202040214

Fundamental differences in the radio properties of red quasars (QSOs), as compared to blue QSOs, have been recently discovered, positioning them as a potential key population in the evolution of galaxies and black holes across cosmic time. To elucida... Read More about The multiwavelength properties of red QSOs -- Evidence for dusty winds as the origin of QSO reddening.

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., Morabito, L., & 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.

Fundamental differences in the radio properties of red and blue quasars: Insight from the LOFAR Two-metre Sky Survey (LoTSS) (2020)
Journal Article
Rosario, D., Fawcett, V., Klindt, L., Alexander, D., Morabito, L., Fotopoulou, S., Lusso, E., & Rivera, G. C. (2020). Fundamental differences in the radio properties of red and blue quasars: Insight from the LOFAR Two-metre Sky Survey (LoTSS). Monthly Notices of the Royal Astronomical Society, 494(3), 3061-3079. https://doi.org/10.1093/mnras/staa866

Red quasi-stellar objects (QSOs) are a subset of the luminous end of the cosmic population of active galactic nuclei (AGN), most of which are reddened by intervening dust along the line-of-sight towards their central engines. In recent work from our... Read More about Fundamental differences in the radio properties of red and blue quasars: Insight from the LOFAR Two-metre Sky Survey (LoTSS).

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.