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Professor Leah Morabito's Outputs (108)

Sub-arcsecond imaging with the International LOFAR Telescope I. Foundational calibration strategy and pipeline (2021)
Journal Article
Morabito, L., Jackson, N., Mooney, S., Sweijen, F., Badole, S., Kukreti, P., Venkattu, D., Groeneveld, C., Kappes, A., Bonnassieux, E., Drabent, A., Iacobelli, M., Croston, J., Best, P., Bondi, M., Callingham, J., Conway, J., Deller, A., Hardcastle, M., McKean, J., …Zucca, P. (2021). Sub-arcsecond imaging with the International LOFAR Telescope I. Foundational calibration strategy and pipeline. Astronomy & Astrophysics, 658, Article A1. https://doi.org/10.1051/0004-6361/202140649

The International LOFAR Telescope is an interferometer with stations spread across Europe. With baselines of up to ~2000 km, LOFAR has the unique capability of achieving sub-arcsecond resolution at frequencies below 200 MHz. However, it is technicall... Read More about Sub-arcsecond imaging with the International LOFAR Telescope I. Foundational calibration strategy and pipeline.

MIGHTEE: Are giant radio galaxies more common than we thought? (2020)
Journal Article
Delhaize, J., Heywood, I., Prescott, M., Jarvis, M., Delvecchio, I., Whittam, I., White, S., Hardcastle, M., Hale, C., Afonso, J., Ao, Y., Brienza, M., Brüggen, M., Collier, J., Daddi, E., Glowacki, M., Maddox, N., Morabito, L., Prandoni, I., Randriamanakoto, Z., …Vaccari, M. (2021). MIGHTEE: Are giant radio galaxies more common than we thought?. Monthly Notices of the Royal Astronomical Society, 501(3), 3833-3845. https://doi.org/10.1093/mnras/staa3837

We report the discovery of two new giant radio galaxies (GRGs) using the MeerKAT International GHz Tiered Extragalactic Exploration (MIGHTEE) survey. Both GRGs were found within a ∼1 deg2 region inside the COSMOS field. They have redshifts of z = 0.1... Read More about MIGHTEE: Are giant radio galaxies more common than we thought?.

Reaching small scales with low-frequency imaging: applications to the Dark Ages (2020)
Journal Article
Morabito, L., & Silk, J. (2021). Reaching small scales with low-frequency imaging: applications to the Dark Ages. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 379(2188), Article 20190571. https://doi.org/10.1098/rsta.2019.0571

The initial conditions for the density perturbations in the early Universe, which dictate the large-scale structure and distribution of galaxies we see today, are set during inflation. Measurements of primordial non-Gaussianity are crucial for distin... Read More about Reaching small scales with low-frequency imaging: applications to the Dark Ages.

Decoherence in LOFAR-VLBI beamforming (2020)
Journal Article
Bonnassieux, E., Edge, A., Morabito, L., & Bonafede, A. (2020). Decoherence in LOFAR-VLBI beamforming. Astronomy & Astrophysics, 637, Article A51. https://doi.org/10.1051/0004-6361/202037486

We show that the use of a superstation (a phased array created using multiple stations of an interferometric array) created in post-processing for LOFAR-VLBI observations introduces a direction-dependent loss of signal in the image. We show this effe... Read More about Decoherence in LOFAR-VLBI beamforming.

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).

Revisiting the Fanaroff–Riley dichotomy and radio-galaxy morphology with the LOFAR Two-Metre Sky Survey (LoTSS) (2019)
Journal Article
Mingo, B., Croston, J., Hardcastle, M., Best, P., Duncan, K., Morganti, R., Rottgering, H., Sabater, J., Shimwell, T., Williams, W., Brienza, M., Gurkan, G., Mahatma, V., Morabito, L., Prandoni, I., Bondi, M., Ineson, J., & Mooney, S. (2019). Revisiting the Fanaroff–Riley dichotomy and radio-galaxy morphology with the LOFAR Two-Metre Sky Survey (LoTSS). Monthly Notices of the Royal Astronomical Society, 488(2), https://doi.org/10.1093/mnras/stz1901

The origin of radio emission in broad absorption line quasars: Results from the LOFAR Two-metre Sky Survey (2019)
Journal Article
Morabito, L., Matthews, J., Best, P., Gürkan, G., Jarvis, M., Prandoni, I., Duncan, K., Hardcastle, M., Kunert-Bajraszewska, M., Mechev, A., Mooney, S., Sabater, J., Röttgering, H., Shimwell, T., Smith, D., Tasse, C., & Williams, W. (2019). The origin of radio emission in broad absorption line quasars: Results from the LOFAR Two-metre Sky Survey. Astronomy & Astrophysics, 622, https://doi.org/10.1051/0004-6361/201833821

LoTSS/HETDEX: Optical quasars (2019)
Journal Article
Gürkan, G., Hardcastle, M., Best, P., Morabito, L., Prandoni, I., Jarvis, M., Duncan, K., Calistro Rivera, G., Callingham, J., Cochrane, R., Croston, J., Heald, G., Mingo, B., Mooney, S., Sabater, J., Röttgering, H., Shimwell, T., Smith, D., Tasse, C., & Williams, W. (2019). LoTSS/HETDEX: Optical quasars. Astronomy & Astrophysics, 622, https://doi.org/10.1051/0004-6361/201833892

The LOFAR Two-metre Sky Survey. II. First data release (2019)
Journal Article
Shimwell, T., Tasse, C., Hardcastle, M., Mechev, A., Williams, W., Best, P., Röttgering, H., Callingham, J., Dijkema, T., de Gasperin, F., Hoang, D., Hugo, B., Mirmont, M., Oonk, J., Prandoni, I., Rafferty, D., Sabater, J., Smirnov, O., van Weeren, R., White, G., …Wilber, A. (2019). The LOFAR Two-metre Sky Survey. II. First data release. Astronomy & Astrophysics, 622, https://doi.org/10.1051/0004-6361/201833559

Systematic effects in LOFAR data: A unified calibration strategy (2019)
Journal Article
de Gasperin, F., Dijkema, T., Drabent, A., Mevius, M., Rafferty, D., van Weeren, R., Brüggen, M., Callingham, J., Emig, K., Heald, G., Intema, H., Morabito, L., Offringa, A., Oonk, R., Orrù, E., Röttgering, H., Sabater, J., Shimwell, T., Shulevski, A., & Williams, W. (2019). Systematic effects in LOFAR data: A unified calibration strategy. Astronomy & Astrophysics, 622, https://doi.org/10.1051/0004-6361/201833867

LoTSS DR1: Double-double radio galaxies in the HETDEX field (2019)
Journal Article
Mahatma, V., Hardcastle, M., Williams, W., Best, P., Croston, J., Duncan, K., Mingo, B., Morganti, R., Brienza, M., Cochrane, R., Gürkan, G., Harwood, J., Jarvis, M., Jamrozy, M., Jurlin, N., Morabito, L., Röttgering, H., Sabater, J., Shimwell, T., Smith, D., …Tasse, C. (2019). LoTSS DR1: Double-double radio galaxies in the HETDEX field. Astronomy & Astrophysics, 622, https://doi.org/10.1051/0004-6361/201833973

The LoTSS view of radio AGN in the local Universe (2019)
Journal Article
Sabater, J., Best, P., Hardcastle, M., Shimwell, T., Tasse, C., Williams, W., Brüggen, M., Cochrane, R., Croston, J., de Gasperin, F., Duncan, K., Gürkan, G., Mechev, A., Morabito, L., Prandoni, I., Röttgering, H., Smith, D., Harwood, J., Mingo, B., Mooney, S., & Saxena, A. (2019). The LoTSS view of radio AGN in the local Universe. Astronomy & Astrophysics, 622, https://doi.org/10.1051/0004-6361/201833883

LoTSS/HETDEX: Disentangling star formation and AGN activity in gravitationally lensed radio-quiet quasars (2019)
Journal Article
Stacey, H., McKean, J., Jackson, N., Best, P., Calistro Rivera, G., Callingham, J., Duncan, K., Gürkan, G., Hardcastle, M., Iacobelli, M., Mechev, A., Morabito, L., Prandoni, I., Röttgering, H., Sabater, J., Shimwell, T., Tasse, C., & Williams, W. (2019). LoTSS/HETDEX: Disentangling star formation and AGN activity in gravitationally lensed radio-quiet quasars. Astronomy & Astrophysics, 622, https://doi.org/10.1051/0004-6361/201833967

The LOFAR Two-metre Sky Survey. IV. First Data Release: Photometric redshifts and rest-frame magnitudes (2019)
Journal Article
Duncan, K., Sabater, J., Röttgering, H., Jarvis, M., Smith, D., Best, P., Callingham, J., Cochrane, R., Croston, J., Hardcastle, M., Mingo, B., Morabito, L., Nisbet, D., Prandoni, I., Shimwell, T., Tasse, C., White, G., Williams, W., Alegre, L., Chyży, K., …van Weeren, R. (2019). The LOFAR Two-metre Sky Survey. IV. First Data Release: Photometric redshifts and rest-frame magnitudes. Astronomy & Astrophysics, 622, https://doi.org/10.1051/0004-6361/201833562

Radio-loud AGN in the first LoTSS data release (2019)
Journal Article
Hardcastle, M., Williams, W., Best, P., Croston, J., Duncan, K., Röttgering, H., Sabater, J., Shimwell, T., Tasse, C., Callingham, J., Cochrane, R., de Gasperin, F., Gürkan, G., Jarvis, M., Mahatma, V., Miley, G., Mingo, B., Mooney, S., Morabito, L., O’Sullivan, S., …Smith, D. (2019). Radio-loud AGN in the first LoTSS data release. Astronomy & Astrophysics, 622, https://doi.org/10.1051/0004-6361/201833893