TY - JOUR
T1 - Revisiting Ram Pressure Stripping in Wolf–Lundmark–Melotte
T2 - No Evidence for Stripped HIwith Local Group L-Band Survey
AU - Rybarczyk, Daniel R.
AU - Koch, Eric W.
AU - Vargas, Fabian Caballero
AU - Stanimirović, Snežana
AU - Pingel, Nickolas M.
AU - Dalcanton, Julianne J.
AU - Leroy, Adam K.
AU - Rosolowsky, Erik W.
AU - Busch, Michael P.
AU - Kim, Chang Goo
AU - Smercina, Adam
AU - Tarantino, Elizabeth
AU - Villanueva, Vicente
AU - Bolatto, Alberto D.
AU - Williams, Thomas G.
N1 - Publisher Copyright:
© 2026. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the https://creativecommons.org/licenses/by/4.0/. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
PY - 2026/7
Y1 - 2026/7
N2 - We analyze H i 21 cm observations of the Local Group dwarf galaxy Wolf–Lundmark–Melotte (WLM) from the Local Group L-Band Survey to search for evidence of ram pressure stripping. While previous MeerKAT-16 observations of WLM showed evidence for off-galaxy atomic gas emission with a geometry suggestive of ram pressure stripping, our observations find no evidence for this stripped gas. We demonstrate that our observations would be sensitive to the claimed detections and suggest that an uncorrected observational flaw with the MeerKAT data led to the apparent off-galaxy emission. The lack of off-galaxy emission obviates the need for uncharacteristically high values of the density of the intergalactic medium in this region.
AB - We analyze H i 21 cm observations of the Local Group dwarf galaxy Wolf–Lundmark–Melotte (WLM) from the Local Group L-Band Survey to search for evidence of ram pressure stripping. While previous MeerKAT-16 observations of WLM showed evidence for off-galaxy atomic gas emission with a geometry suggestive of ram pressure stripping, our observations find no evidence for this stripped gas. We demonstrate that our observations would be sensitive to the claimed detections and suggest that an uncorrected observational flaw with the MeerKAT data led to the apparent off-galaxy emission. The lack of off-galaxy emission obviates the need for uncharacteristically high values of the density of the intergalactic medium in this region.
KW - Dwarf galaxies (416)
KW - H I line emission (690)
KW - Intergalactic medium (813)
KW - Interstellar medium (847)
KW - Local Group (929)
UR - https://www.scopus.com/pages/publications/105041050516
UR - https://www.scopus.com/pages/publications/105041050516#tab=citedBy
U2 - 10.3847/1538-3881/ae6b6e
DO - 10.3847/1538-3881/ae6b6e
M3 - Article
AN - SCOPUS:105041050516
SN - 0004-6256
VL - 172
JO - Astronomical Journal
JF - Astronomical Journal
IS - 1
M1 - 2
ER -