TY - JOUR
T1 - Gemini follow-up of two massive HI clouds discovered with the Australian Square Kilometer Array Pathfinder
AU - Madrid, Juan P.
AU - Lee-Waddell, Karen
AU - Serra, Paolo
AU - Koribalski, Bärbel S.
AU - Schirmer, Mischa
AU - Spekkens, Kristine
AU - Wang, Jing
PY - 2018
Y1 - 2018
N2 - Using the Gemini Multi Object Spectrograph (GMOS) we search for optical counterparts of two massive (∼109 M o) neutral hydrogen clouds near the spiral galaxy IC 5270, located in the outskirts of the IC 1459 group. These two H i clouds were recently discovered using the Australian Square Kilometer Array Pathfinder (ASKAP). Two low surface brightness optical counterparts to one of these H i clouds are identified in the new Gemini data that reaches down to magnitudes of ∼27.5 mag in the g-band. The observed H i mass-to-light ratio derived with these new data, MH I/Lg = 242, is among the highest reported to date. We are also able to rule out that the two H i clouds are dwarf companions of IC 5270. Tidal interactions and ram pressure stripping are plausible explanations for the physical origin of these two clouds.
AB - Using the Gemini Multi Object Spectrograph (GMOS) we search for optical counterparts of two massive (∼109 M o) neutral hydrogen clouds near the spiral galaxy IC 5270, located in the outskirts of the IC 1459 group. These two H i clouds were recently discovered using the Australian Square Kilometer Array Pathfinder (ASKAP). Two low surface brightness optical counterparts to one of these H i clouds are identified in the new Gemini data that reaches down to magnitudes of ∼27.5 mag in the g-band. The observed H i mass-to-light ratio derived with these new data, MH I/Lg = 242, is among the highest reported to date. We are also able to rule out that the two H i clouds are dwarf companions of IC 5270. Tidal interactions and ram pressure stripping are plausible explanations for the physical origin of these two clouds.
UR - https://hdl.handle.net/1959.7/uws:64970
U2 - 10.3847/2041-8213/aaaa1d
DO - 10.3847/2041-8213/aaaa1d
M3 - Article
SN - 2041-8205
VL - 854
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
IS - 1
ER -