The discovery of a z = 0.7092 oh megamaser with the mightee survey

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dc.contributor.authorJarvis, Matthew
dc.contributor.authorBaker, Andrew
dc.contributor.authorHeywood, Ian
dc.date.accessioned2024-11-15T08:40:53Z
dc.date.available2024-11-15T08:40:53Z
dc.date.issued2024
dc.description.abstractWe 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-1 with respect to the systemic velocity. The host galaxy has a stellar mass of M = 2.95 × 1010 M- and a star formation rate of SFR = 371 M- yr-1, 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
dc.identifier.citationJarvis, M.J., Heywood, I., Jewell, S.M., Deane, R.P., Klöckner, H.R., Ponomareva, A.A., Maddox, N., Baker, A.J., Bianchetti, A., Hess, K.M. and Roberts, H., 2024. The discovery of az= 0.7092 OH megamaser with the MIGHTEE survey. Monthly Notices of the Royal Astronomical Society, 529(4), pp.3484-3494.
dc.identifier.urihttps://doi.org/10.1093/mnras/stad3821
dc.identifier.urihttps://hdl.handle.net/10566/19690
dc.language.isoen
dc.publisherOxford University Press
dc.subjectgalaxies: ISM
dc.subjectgalaxies: starburst
dc.subjectISM: molecules
dc.subjectmasers
dc.titleThe discovery of a z = 0.7092 oh megamaser with the mightee survey
dc.typeArticle

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