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MUSE-ALMA Haloes - ...
MUSE-ALMA Haloes - IX. Morphologies and stellar properties of gas-rich galaxies
- Article/chapterEnglish2023
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LIBRIS-ID:oai:DiVA.org:su-221087
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-221087URI
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https://doi.org/10.1093/mnras/stad2134DOI
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
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Understanding how galaxies interact with the circumgalactic medium (CGM) requires determining how galaxies’ morphological and stellar properties correlate with their CGM properties. We report an analysis of 66 well-imaged galaxies detected in Hubble Space Telescope and Very Large Telescope MUSE observations and determined to be within ±500 km s−1 of the redshifts of strong intervening quasar absorbers at 0.2 ≲ z ≲ 1.4 with H I column densities NHI>1018cm−2�HI>1018cm−2. We present the geometrical properties (Sérsic indices, effective radii, axis ratios, and position angles) of these galaxies determined using GALFIT. Using these properties along with star formation rates (SFRs, estimated using the H α or [O II] luminosity) and stellar masses (M* estimated from spectral energy distribution fits), we examine correlations among various stellar and CGM properties. Our main findings are as follows: (1) SFR correlates well with M*, and most absorption-selected galaxies are consistent with the star formation main sequence of the global population. (2) More massive absorber counterparts are more centrally concentrated and are larger in size. (3) Galaxy sizes and normalized impact parameters correlate negatively with NHI, consistent with higher NHI absorption arising in smaller galaxies, and closer to galaxy centres. (4) Absorption and emission metallicities correlate with M* and specific SFR, implying metal-poor absorbers arise in galaxies with low past star formation and faster current gas consumption rates. (5) SFR surface densities of absorption-selected galaxies are higher than predicted by the Kennicutt–Schmidt relation for local galaxies, suggesting a higher star formation efficiency in the absorption-selected galaxies.
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Kulkarni, Varsha P.
(author)
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Weng, Simon
(author)
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Péroux, Celine
(author)
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Augustin, Ramona
(author)
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Hayes, Matthew J.,1977-Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)mhaye
(author)
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Ayromlou, Mohammadreza
(author)
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Kacprzak, Glenn G.
(author)
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Howk, J. Christopher
(author)
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Szakacs, Roland
(author)
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Klitsch, Anne
(author)
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Hamanowicz, Aleksandra
(author)
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Fresco, Alejandra
(author)
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Zwaan, Martin A.
(author)
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Biggs, Andrew D.
(author)
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Fox, Andrew J.
(author)
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Kassin, Susan
(author)
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Kuntschner, Harald
(author)
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Stockholms universitetInstitutionen för astronomi
(creator_code:org_t)
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In:Monthly notices of the Royal Astronomical Society524:4, s. 5524-55470035-87111365-2966
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Karki, Arjun
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Kulkarni, Varsha ...
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Weng, Simon
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Péroux, Celine
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Augustin, Ramona
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Hayes, Matthew J ...
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Ayromlou, Mohamm ...
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Kacprzak, Glenn ...
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Howk, J. Christo ...
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Szakacs, Roland
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Klitsch, Anne
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Hamanowicz, Alek ...
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Fresco, Alejandr ...
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Zwaan, Martin A.
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Biggs, Andrew D.
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Fox, Andrew J.
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Kassin, Susan
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Kuntschner, Hara ...
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NATURAL SCIENCES
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Stockholm University