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- W3100648692 abstract "Theoretically, inflowing filaments of gas are one of the main causes of growth for a galaxy. Nonetheless, observationally, probing ongoing gas accretion is challenging. As part of the Gas Stripping Phenomena in galaxies with MUSE (GASP) program, we present the analysis of a spiral galaxy at z = 0.04648 whose characteristics indeed are consistent with a scenario in which gas accretion plays a major role. The most salient indirect parts of evidence that support this picture are as follows: (1) The galaxy is isolated, and its position rules out the mechanisms expected in dense environments. (2) It shows a pronounced lopsidedness extending toward the west. According to the spatially resolved star formation history, this component was formed ago. (3) It has many large and elongated H ii regions that are an indication of a fragmentation due to disk instability. (4) The stellar and gas kinematics are quite symmetric around the same axis, but in the gas the locus of negative velocities shows a convexity toward the east, as if new gas has been infalling with different orientation and velocity. (5) The metallicity distribution is inhomogeneous and shows exceptionally steep gradients from the center toward the outskirts, especially in the southwest side. (6) The luminosity-weighted age is generally low (∼8 Gyr) and particularly low (<7 Gyr) along a trail crossing the galaxy from southwest toward the north. It might trace the path of the accreted gas. These findings point to an inflow of gas probably proceeding from the southwest side of the galaxy." @default.
- W3100648692 created "2020-11-23" @default.
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- W3100648692 date "2018-01-11" @default.
- W3100648692 modified "2023-10-16" @default.
- W3100648692 title "GASP. VII. Signs of Gas Inflow onto a Lopsided Galaxy" @default.
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