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Professor Leah Morabito's Outputs (108)

Monster Radio Jet (>66 kpc) Observed in Quasar at z ∼​​​​​ 5 (2025)
Journal Article
Gloudemans, A. J., Sweijen, F., Morabito, L. K., Farina, E. P., Duncan, K. J., Harikane, Y., Röttgering, H. J. A., Saxena, A., & Schindler, J.-T. (2025). Monster Radio Jet (>66 kpc) Observed in Quasar at z ∼​​​​​ 5. Astrophysical Journal Letters, 980(1), Article L8. https://doi.org/10.3847/2041-8213/ad9609

We present the discovery of a large extended radio jet associated with the extremely radio-loud quasar J1601+3102 at z ∼​​​​​ 5 from subarcsecond resolution imaging at 144 MHz with the International LOFAR Telescope. These large radio lobes have been... Read More about Monster Radio Jet (>66 kpc) Observed in Quasar at z ∼​​​​​ 5.

Connection between steep radio spectral slopes and dust extinction in QSOs: evidence for outflow-driven shocks in dusty QSOs (2025)
Journal Article
Fawcett, V. A., Harrison, C. M., Alexander, D. M., Morabito, L. K., Kharb, P., Rosario, D. J., Baghel, J., Ghosh, S., Sasikumar, S., Petley, J., Sargent, C., & Calistro Rivera, G. (2025). Connection between steep radio spectral slopes and dust extinction in QSOs: evidence for outflow-driven shocks in dusty QSOs. Monthly Notices of the Royal Astronomical Society, 537(2), 2003-2023. https://doi.org/10.1093/mnras/staf105

Recent studies have found a striking positive correlation between the amount of dust obscuration and enhanced radio emission in quasi-stellar objects (QSOs). However, what causes this connection remains unclear. In this paper we analyse uGMRT Band-3... Read More about Connection between steep radio spectral slopes and dust extinction in QSOs: evidence for outflow-driven shocks in dusty QSOs.

A novel Bayesian approach for decomposing the radio emission of quasars – II. Link between quasar radio emission and black hole mass (2025)
Journal Article
Yue, B. H., Duncan, K. J., Best, P. N., Arnaudova, M. I., Morabito, L. K., Petley, J. W., Röttgering, H. J. A., Shenoy, S., & Smith, D. J. B. (2025). A novel Bayesian approach for decomposing the radio emission of quasars – II. Link between quasar radio emission and black hole mass. Monthly Notices of the Royal Astronomical Society, 537(2), 858-875. https://doi.org/10.1093/mnras/staf077

Whether the mass of supermassive black hole ( M BH ) is directly linked to the quasar radio luminosity remains a long-debated issue, and understanding the role of M BH in the evolution of quasars is pivotal to unveiling the mechanism of active galact... Read More about A novel Bayesian approach for decomposing the radio emission of quasars – II. Link between quasar radio emission and black hole mass.

HETDEX-LOFAR Spectroscopic Redshift Catalog (2024)
Journal Article
Debski, M. H., Zeimann, G. R., Hill, G. J., Schneider, D. P., Morabito, L., Dalton, G., Jarvis, M. J., Mentuch Cooper, E., Ciardullo, R., Gawiser, E., & Jurlin, N. (2025). HETDEX-LOFAR Spectroscopic Redshift Catalog. The Astrophysical Journal, 978(1), Article 101. https://doi.org/10.3847/1538-4357/ad957b

We combine the power of blind integral field spectroscopy from the Hobby–Eberly Telescope (HET) Dark Energy Experiment (HETDEX) with sources detected by the Low Frequency Array (LOFAR) to construct the HETDEX-LOFAR Spectroscopic Redshift Catalog. Sta... Read More about HETDEX-LOFAR Spectroscopic Redshift Catalog.

A spatially resolved spectral analysis of giant radio galaxies with MeerKAT (2024)
Journal Article
Charlton, K. K. L., Delhaize, J., Thorat, K., Heywood, I., Jarvis, M. J., Hardcastle, M. J., An, F., Delvecchio, I., Hale, C. L., Whittam, I. H., Brüggen, M., Marchetti, L., Morabito, L., Randriamanakoto, Z., White, S. V., & Taylor, A. R. (2025). A spatially resolved spectral analysis of giant radio galaxies with MeerKAT. Monthly Notices of the Royal Astronomical Society, 537(1), 272-284. https://doi.org/10.1093/mnras/stae2543

Unveiling AGN outflows: [O iii] outflow detection rates and correlation with low-frequency radio emission (2024)
Journal Article
Escott, E. L., Morabito, L. K., Scholtz, J., Hickox, R. C., Harrison, C. M., Alexander, D. M., Arnaudova, M. I., Smith, D. J. B., Duncan, K. J., Petley, J., Kondapally, R., Calistro Rivera, G., & Kolwa, S. (2025). Unveiling AGN outflows: [O iii] outflow detection rates and correlation with low-frequency radio emission. Monthly Notices of the Royal Astronomical Society, 536(2), 1166-1179. https://doi.org/10.1093/mnras/stae2645

1-arcsecond imaging of the ELAIS-N1 field at 144MHz using the LoTSS survey with the international LOFAR telescope (2024)
Journal Article
Ye, H., Sweijen, F., van Weeren, R. J., Williams, W., de Jong, J., Morabito, L. K., Rottgering, H., Shimwell, T. W., Best, P. N., Bondi, M., Brüggen, M., de Gasperin, F., & Tasse, C. (2024). 1-arcsecond imaging of the ELAIS-N1 field at 144MHz using the LoTSS survey with the international LOFAR telescope. Astronomy & Astrophysics, 691, Article A347. https://doi.org/10.1051/0004-6361/202348103

We present the first wide area (2.5 × 2.5 deg2) LOFAR high band antenna image at a resolution of 1.2″ × 2″ with a median noise of ≈80 µJy beam−1. It was made from an 8-hour International LOFAR Telescope (ILT) observation of the ELAIS-N1 field at freq... Read More about 1-arcsecond imaging of the ELAIS-N1 field at 144MHz using the LoTSS survey with the international LOFAR telescope.

The properties of the interstellar medium in dusty star-forming galaxies at z ∼ 2–4: the shape of the CO spectral line energy distributions (2024)
Journal Article
Taylor, D. J., Swinbank, A. M., Smail, I., Puglisi, A., Birkin, J. E., Dudzevičiūtė, U., Chen, C.-C., Ikarashi, S., Frias Castillo, M., Weiß, A., Li, Z., Chapman, S. C., Jansen, J., Jiménez-Andrade, E. F., Morabito, L. K., Murphy, E. J., Rybak, M., & van der Werf, P. P. (2025). The properties of the interstellar medium in dusty star-forming galaxies at z ∼ 2–4: the shape of the CO spectral line energy distributions. Monthly Notices of the Royal Astronomical Society, 536(2), 1149-1165. https://doi.org/10.1093/mnras/stae2642

Ubiquitous radio emission in quasars: Predominant AGN origin and a connection to jets, dust, and winds (2024)
Journal Article
Calistro Rivera, G., Alexander, D. M., Harrison, C. M., Fawcett, V. A., Best, P. N., Williams, W. L., Hardcastle, M. J., Rosario, D. J., Smith, D. J. B., Arnaudova, M. I., Escott, E., Gürkan, G., Kondapally, R., Miley, G., Morabito, L. K., Petley, J., Prandoni, I., Röttgering, H. J. A., & Yue, B.-H. (2024). Ubiquitous radio emission in quasars: Predominant AGN origin and a connection to jets, dust, and winds. Astronomy & Astrophysics, 691, Article A191. https://doi.org/10.1051/0004-6361/202348982

We present a comprehensive study of the physical origin of radio emission in optical quasars at redshifts z < 2.5. We focus particularly on the associations between compact radio emission, dust reddening, and outflows identified in our earlier work....

A hidden active galactic nucleus population: the first radio luminosity functions constructed by physical process (2024)
Journal Article
Morabito, L. K., Kondapally, R., Best, P. N., Yue, B. .-H., de Jong, J. M. G. H. J., Sweijen, F., Bondi, M., Schwarz, D. J., Smith, D. J. B., van Weeren, R. J., Röttgering, H. J. A., Shimwell, T. W., & Prandoni, I. (2025). A hidden active galactic nucleus population: the first radio luminosity functions constructed by physical process. Monthly Notices of the Royal Astronomical Society: Letters, 536(1), L32-L37. https://doi.org/10.1093/mnrasl/slae104

Environments of Luminous Low-frequency Radio Galaxies Since Cosmic Noon: Jet-mode Feedback Dominates in Groups (2024)
Journal Article
Petter, G. C., Hickox, R. C., Morabito, L. K., & Alexander, D. M. (2024). Environments of Luminous Low-frequency Radio Galaxies Since Cosmic Noon: Jet-mode Feedback Dominates in Groups. The Astrophysical Journal, 972(2), Article 184. https://doi.org/10.3847/1538-4357/ad6849

Coupling between relativistic jets launched by accreting supermassive black holes and the surrounding gaseous media is a vital ingredient in galaxy evolution models. To constrain the environments in which this feedback takes place over cosmic time, w... Read More about Environments of Luminous Low-frequency Radio Galaxies Since Cosmic Noon: Jet-mode Feedback Dominates in Groups.

Into the depths: Unveiling ELAIS-N1 with LOFAR’s deepest sub-arcsecond wide-field images (2024)
Journal Article
de Jong, J. M. G. H. J., van Weeren, R. J., Sweijen, F., Oonk, J. B. R., Shimwell, T. W., Offringa, A. R., Morabito, L. K., Röttgering, H. J. A., Kondapally, R., Escott, E. L., Best, P. N., Bondi, M., Ye, H., & Petley, J. W. (2024). Into the depths: Unveiling ELAIS-N1 with LOFAR’s deepest sub-arcsecond wide-field images. Astronomy & Astrophysics, 689, Article A80. https://doi.org/10.1051/0004-6361/202450595

We present the deepest wide-field 115–166 MHz image at sub-arcsecond resolution spanning an area of 2.5◦ × 2.5◦ centred at the ELAIS-N1 deep field. To achieve this, we improved the direction-independent (DI) and direction-dependent (DD) calibrations... Read More about Into the depths: Unveiling ELAIS-N1 with LOFAR’s deepest sub-arcsecond wide-field images.

The first high-redshift cavity power measurements of cool-core galaxy clusters with the International LOFAR Telescope (2024)
Journal Article
Timmerman, R., van Weeren, R. J., Botteon, A., Röttgering, H. J. A., Morabito, L. K., & Sweijen, F. (2024). The first high-redshift cavity power measurements of cool-core galaxy clusters with the International LOFAR Telescope. Astronomy & Astrophysics, 687, Article A31. https://doi.org/10.1051/0004-6361/202347974

Radio-mode feedback associated with the active galactic nuclei (AGNs) at the cores of galaxy clusters injects a large amount of energy into the intracluster medium (ICM), offsetting radiative losses through X-ray emission. This mechanism prevents the... Read More about The first high-redshift cavity power measurements of cool-core galaxy clusters with the International LOFAR Telescope.

LOFAR HBA observations of the Euclid Deep Field North (EDFN) (2024)
Journal Article
Bondi, M., Scaramella, R., Zamorani, G., Ciliegi, P., Vitello, F., Arias, M., …White, G. J. (2024). LOFAR HBA observations of the Euclid Deep Field North (EDFN). Astronomy & Astrophysics, 683, Article A179. https://doi.org/10.1051/0004-6361/202348333

We present the first deep (72 h of observations) radio image of the Euclid Deep Field North (EDFN) obtained with the LOw-Frequency ARray (LOFAR) High Band Antenna (HBA) at 144 MHz. The EDFN is the latest addition to the LOFAR Two-Metre Sky Survey (Lo... Read More about LOFAR HBA observations of the Euclid Deep Field North (EDFN).

A novel Bayesian approach for decomposing the radio emission of quasars: I. Modelling the radio excess in red quasars (2024)
Journal Article
Yue, B. -., Best, P. N., Duncan, K. J., Calistro-Rivera, G., Morabito, L. K., Petley, J. W., …Smith, D. J. B. (2024). A novel Bayesian approach for decomposing the radio emission of quasars: I. Modelling the radio excess in red quasars. Monthly Notices of the Royal Astronomical Society, 529(4), 3939-3957. https://doi.org/10.1093/mnras/stae725

Studies show that both radio jets from the active galactic nuclei (AGNs) and the star formation (SF) activity in quasar host galaxies contribute to the quasar radio emission; yet their relative contributions across the population remain unclear. Here... Read More about A novel Bayesian approach for decomposing the radio emission of quasars: I. Modelling the radio excess in red quasars.

How does the radio enhancement of broad absorption line quasars relate to colour and accretion rate? (2024)
Journal Article
Petley, J. W., Morabito, L. K., Rankine, A. L., Richards, G. T., Thomas, N. L., Alexander, D. M., …Kolwa, S. (2024). How does the radio enhancement of broad absorption line quasars relate to colour and accretion rate?. Monthly Notices of the Royal Astronomical Society, 529(3), 1995-2007. https://doi.org/10.1093/mnras/stae626

The origin of radio emission in different populations of radio-quiet quasars is relatively unknown, but recent work has uncovered various drivers of increased radio-detection fraction. In this work, we pull together three known factors: optical colou... Read More about How does the radio enhancement of broad absorption line quasars relate to colour and accretion rate?.

Cosmic evolution of FRI and FRII sources out to z = 2.5 (2024)
Journal Article
de Jong, J. M. G. H. J., Röttgering, H. J. A., Kondapally, R., Mingo, B., van Weeren, R. J., Best, P. N., …Vecchi, F. F. (2024). Cosmic evolution of FRI and FRII sources out to z = 2.5. Astronomy & Astrophysics, 683, Article A23. https://doi.org/10.1051/0004-6361/202347131

Context.
Radio-loud active galactic nuclei (RLAGN) play an important role in the evolution of galaxies through the effects on their environment. The two major morphological classes are core-bright (FRI) and edge-bright (FRII) sources. With the LOw-... Read More about Cosmic evolution of FRI and FRII sources out to z = 2.5.

Nuclear regions as seen with LOFAR international baselines: A high-resolution study of the recurrent activity (2024)
Journal Article
Jurlin, N., Morganti, R., Sweijen, F., Morabito, L. K., Brienza, M., Barthel, P., & Miley, G. K. (2024). Nuclear regions as seen with LOFAR international baselines: A high-resolution study of the recurrent activity. Astronomy & Astrophysics, 682, Article A118. https://doi.org/10.1051/0004-6361/202245821

Context. Radio galaxies dominate the sky at radio wavelengths and represent an essential piece in the galaxy evolution puzzle. High-resolution studies focussed on statistical samples of radio galaxies are expected to shed light on the triggering mech... Read More about Nuclear regions as seen with LOFAR international baselines: A high-resolution study of the recurrent activity.