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Towards sub-kpc scale kinematics of molecular and ionized gas of star-forming galaxies at z similar to 1
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SYSNO ASEP 0539811 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Towards sub-kpc scale kinematics of molecular and ionized gas of star-forming galaxies at z similar to 1 Author(s) Girard, M. (CH) Number of authors 7 Article number A91 Source Title Astronomy & Astrophysics. - : EDP Sciences - ISSN 0004-6361
Roč. 631, October (2019)Number of pages 10 s. Publication form Online - E Language eng - English Country FR - France Keywords galaxies ; high-redshift ; kinematics and dynamics Subject RIV BN - Astronomy, Celestial Mechanics, Astrophysics OECD category Astronomy (including astrophysics,space science) Research Infrastructure EU-ARC.CZ - 90067 - Astronomický ústav AV ČR, v. v. i. Method of publishing Open access UT WOS 000515093500001 EID SCOPUS 85074574217 DOI 10.1051/0004-6361/201935896 Annotation We compare the molecular and ionized gas kinematics of two strongly lensed galaxies at z similar to 1 that lie on the main sequence at this redshift. The observations were made with ALMA and MUSE, respectively. We derive the CO and [OII] rotation curves and dispersion profiles of these two galaxies. We find a difference between the observed molecular and ionized gas rotation curves for one of the two galaxies, the Cosmic Snake, for which we obtain a spatial resolution of a few hundred parsec along the major axis. The rotation curve of the molecular gas is steeper than the rotation curve of the ionized gas. In the second galaxy, A521, the molecular and ionized gas rotation curves are consistent, but the spatial resolution is only a few kiloparsec on the major axis. Using simulations, we investigate the effect of the thickness of the gas disk and effective radius on the observed rotation curves and find that a more extended and thicker disk smoothens the curve. Workplace Astronomical Institute Contact Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Year of Publishing 2021 Electronic address https://doi.org/10.1051/0004-6361/201935896
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