The discovery of a z = 0.7092 OH megamaser with the MIGHTEE survey
- Author
- Matt J. Jarvis, Ian Heywood, Sophie M. Jewell, Roger P. Deane, H.-R. Klöckner, Anastasia A. Ponomareva, Natasha Maddox, Andrew J. Baker, Alessandro Bianchetti, Kelley M. Hess, Hayley Roberts, Giulia Rodighiero, Ilaria Ruffa, Francesco Sinigaglia, Rohan G. Varadaraj, Imogen H. Whittam, Elizabeth A. K. Adams, Maarten Baes (UGent) , Eric J. Murphy, Hengxing Pan and Mattia Vaccari
- Organization
- Project
- Abstract
- We present the discovery of the most distant OH megamaser (OHM) to be observed in the main lines, using data from the MeerKAT International Giga-Hertz Tiered Extragalactic Exploration (MIGHTEE) survey. At a newly measured redshift of z = 0.7092, the system has strong emission in both the 1665 MHz (L ≈ 2500 L⊙) and 1667 MHz (L ≈ 4.5 × 104 L⊙) transitions, with both narrow and broad components. We interpret the broad line as a high-velocity-dispersion component of the 1667 MHz transition, with velocity v ∼ 330 km/s with respect to the systemic velocity. The host galaxy has a stellar mass of M⋆ = 2.95 × 10^10 M⊙ and a star formation rate of SFR = 371 M⊙/yr, placing it ∼1.5 dex above the main sequence for star-forming galaxies at this redshift, and can be classified as an ultraluminous infrared galaxy. Alongside the optical imaging data, which exhibit evidence for a tidal tail, this suggests that the OHM arises from a system that is currently undergoing a merger, which is stimulating star formation and providing the necessary conditions for pumping the OH molecule to saturation. The OHM is likely to be lensed, with a magnification factor of ∼2.5, and perhaps more if the maser emitting region is compact and suitably offset relative to the centroid of its host galaxy’s optical light. This discovery demonstrates that spectral line mapping with the new generation of radio interferometers may provide important information on the cosmic merger history of galaxies.
- Keywords
- masers, ISM: molecules, galaxies: ISM, galaxies: starburst, ACTIVE GALACTIC NUCLEI, INFRARED-RADIO CORRELATION, STAR-FORMING GALAXIES, GHZ LARGE PROJECT, H I, LEGACY SURVEY, MIDINFRARED PROPERTIES, VLBI OBSERVATIONS, STELLAR MASS, DENSE GAS
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-01HTKJRQY4X8BB5K23ZCCZ50V6
- MLA
- Jarvis, Matt J., et al. “The Discovery of a z = 0.7092 OH Megamaser with the MIGHTEE Survey.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 529, no. 4, 2024, pp. 3484–94, doi:10.1093/mnras/stad3821.
- APA
- Jarvis, M. J., Heywood, I., Jewell, S. M., Deane, R. P., Klöckner, H.-R., Ponomareva, A. A., … Vaccari, M. (2024). The discovery of a z = 0.7092 OH megamaser with the MIGHTEE survey. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 529(4), 3484–3494. https://doi.org/10.1093/mnras/stad3821
- Chicago author-date
- Jarvis, Matt J., Ian Heywood, Sophie M. Jewell, Roger P. Deane, H.-R. Klöckner, Anastasia A. Ponomareva, Natasha Maddox, et al. 2024. “The Discovery of a z = 0.7092 OH Megamaser with the MIGHTEE Survey.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 529 (4): 3484–94. https://doi.org/10.1093/mnras/stad3821.
- Chicago author-date (all authors)
- Jarvis, Matt J., Ian Heywood, Sophie M. Jewell, Roger P. Deane, H.-R. Klöckner, Anastasia A. Ponomareva, Natasha Maddox, Andrew J. Baker, Alessandro Bianchetti, Kelley M. Hess, Hayley Roberts, Giulia Rodighiero, Ilaria Ruffa, Francesco Sinigaglia, Rohan G. Varadaraj, Imogen H. Whittam, Elizabeth A. K. Adams, Maarten Baes, Eric J. Murphy, Hengxing Pan, and Mattia Vaccari. 2024. “The Discovery of a z = 0.7092 OH Megamaser with the MIGHTEE Survey.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 529 (4): 3484–3494. doi:10.1093/mnras/stad3821.
- Vancouver
- 1.Jarvis MJ, Heywood I, Jewell SM, Deane RP, Klöckner H-R, Ponomareva AA, et al. The discovery of a z = 0.7092 OH megamaser with the MIGHTEE survey. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 2024;529(4):3484–94.
- IEEE
- [1]M. J. Jarvis et al., “The discovery of a z = 0.7092 OH megamaser with the MIGHTEE survey,” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 529, no. 4, pp. 3484–3494, 2024.
@article{01HTKJRQY4X8BB5K23ZCCZ50V6,
abstract = {{We present the discovery of the most distant OH megamaser (OHM) to be observed in the main lines, using data from the MeerKAT International Giga-Hertz Tiered Extragalactic Exploration (MIGHTEE) survey. At a newly measured redshift of z = 0.7092, the system has strong emission in both the 1665 MHz (L ≈ 2500 L⊙) and 1667 MHz (L ≈ 4.5 × 104 L⊙) transitions, with both narrow and broad components. We interpret the broad line as a high-velocity-dispersion component of the 1667 MHz transition, with velocity v ∼ 330 km/s with respect to the systemic velocity. The host galaxy has a stellar mass of M⋆ = 2.95 × 10^10 M⊙ and a star formation rate of SFR = 371 M⊙/yr, placing it ∼1.5 dex above the main sequence for star-forming galaxies at this redshift, and can be classified as an ultraluminous infrared galaxy. Alongside the optical imaging data, which exhibit evidence for a tidal tail, this suggests that the OHM arises from a system that is currently undergoing a merger, which is stimulating star formation and providing the necessary conditions for pumping the OH molecule to saturation. The OHM is likely to be lensed, with a magnification factor of ∼2.5, and perhaps more if the maser emitting region is compact and suitably offset relative to the centroid of its host galaxy’s optical light. This discovery demonstrates that spectral line mapping with the new generation of radio interferometers may provide important information on the cosmic merger history of galaxies.}},
author = {{Jarvis, Matt J. and Heywood, Ian and Jewell, Sophie M. and Deane, Roger P. and Klöckner, H.-R. and Ponomareva, Anastasia A. and Maddox, Natasha and Baker, Andrew J. and Bianchetti, Alessandro and Hess, Kelley M. and Roberts, Hayley and Rodighiero, Giulia and Ruffa, Ilaria and Sinigaglia, Francesco and Varadaraj, Rohan G. and Whittam, Imogen H. and Adams, Elizabeth A. K. and Baes, Maarten and Murphy, Eric J. and Pan, Hengxing and Vaccari, Mattia}},
issn = {{0035-8711}},
journal = {{MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY}},
keywords = {{masers,ISM: molecules,galaxies: ISM,galaxies: starburst,ACTIVE GALACTIC NUCLEI,INFRARED-RADIO CORRELATION,STAR-FORMING GALAXIES,GHZ LARGE PROJECT,H I,LEGACY SURVEY,MIDINFRARED PROPERTIES,VLBI OBSERVATIONS,STELLAR MASS,DENSE GAS}},
language = {{eng}},
number = {{4}},
pages = {{3484--3494}},
title = {{The discovery of a z = 0.7092 OH megamaser with the MIGHTEE survey}},
url = {{http://doi.org/10.1093/mnras/stad3821}},
volume = {{529}},
year = {{2024}},
}
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