We created a simple toy model to quantify the timescale of H I stripping in the cluster by reproducing the observed M r′– M HI relation. cluster centre and massive galaxies), consistent with massive galaxies playing an active role in the removal of H I.
The H I-detected dwarfs avoid the most massive potentials (i.e. There are two clear cases of ram pressure shaping the H I, with the LTDs displaying compressed H I on the side closest to the cluster centre and a one-sided, starless tail pointing away from the cluster centre. Eight of the H I-detected LTDs host irregular or asymmetric H I emission and disturbed or lopsided stellar emission. By contrast, the H I-detected ETDs have likely been in the cluster longer than the LTDs and acquired their H I through a recent merger or accretion from nearby H I. The H I-detected LTDs have likely just joined the cluster and are on their first infall as they are located at large clustocentric radii, with comparable M HI and mean stellar surface brightness at fixed luminosity as blue, star-forming LTDs in the field. We detected H I in 17 out of the 304 dwarfs in our field, with 14 out of the 36 late-type dwarfs (LTDs) and three out of the 268 early-type dwarfs (ETDs). We are able to detect an impressive M HI = 5 × 10 5 M ⊙ 3 σ point source with a line width of 50 km s −1 at a distance of 20 Mpc. The H I images presented in this work have a 3 σ column density sensitivity between 2.7 and 50 × 10 18 cm −2 over 25 km s −1 for spatial resolution between 4 and 1 kpc. We present MeerKAT Fornax Survey atomic hydrogen (H I) observations of the dwarf galaxies located in the central ∼2.5 × 4 deg 2 of the Fornax galaxy cluster ( R vir ∼2°). Ruhr University Bochum, Faculty of Physics and Astronomy, Astronomical Institute, 44780 Bochum, GermanyĪrmagh Observatory and Planetarium, College Hill, Armagh BT61 9DG, UKĬentre for Space Research, North-West University, Potchefstroom 2520, South Africa Max-Plank-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germanyĭepartment of Physics and Electronics, Rhodes University, PO Box 94 Makhanda 6140, South Africa Kapteyn Astronomical Institute, University of Groningen, PO Box 800 9700 AV Groningen, The Netherlandsĭepartment of Astronomy, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa Netherlands Institute for Radio Astronomy (ASTRON), Oude HoogeveensedPD Dwingeloo, The NetherlandsĮ-mail: – Osservatorio Astronomico di Cagliari, Via della Scienza 5, 09047 Selargius, CA, Italy Astronomical objects: linking to databasesĭ.Including author names using non-Roman alphabets.Suggested resources for more tips on language editing in the sciences Punctuation and style concerns regarding equations, figures, tables, and footnotes
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