MIGHTEE-\HI: Possible interactions with the galaxy NGC~895
Abstract
The transformation and evolution of a galaxy is strongly influenced by interactions with its environment. Neutral hydrogen (\HI) is an excellent way to trace these interactions. Here, we present \HI\ observations of the spiral galaxy NGC~895, which was previously thought to be isolated. High-sensitivity \HI\ observations from the MeerKAT large survey project MIGHTEE reveal possible interaction features, such as extended spiral arms, and the two newly discovered \HI\ companions, that drive us to change the narrative that it is an isolated galaxy. We combine these observations with deep optical images from the Hyper Suprime Camera to show an absence of tidal debris between NGC 895 and its companions. We do find an excess of light in the outer parts of the companion galaxy MGTHJ022138.1-052631 which could be an indication of external perturbation and thus possible sign of interactions. Our analysis shows that NGC~895 is an actively star-forming galaxy with a SFR of , a value typical for high stellar mass galaxies on the star forming main sequence. It is reasonable to state that different mechanisms may have contributed to the observed features in NGC~895 and this emphasizes the need to revisit the target with more detailed observations. Our work shows the high potential and synergy of using state-of-the-art data in both \HI\ and optical to reveal a more complete picture of galaxy environments.
Keywords
Cite
@article{arxiv.2303.09371,
title = {MIGHTEE-\HI: Possible interactions with the galaxy NGC~895},
author = {Brenda Namumba and Javier Román and Jesus Falcon Barroso and Johan H. Knapen and Ianjamasimanana Roger and Elizabeth Naluminsa and Gyula I. G. Jozsa and Marie Korsaga and Natasha Maddox and Brad Frank and Sinenhlanhla Sikhosana and Samuel Legodi and Claude Carignan and Anastasia A. Ponomareva and Tom Jarrett and Danielle Lucero and Oleg M. Smirnov and Thijs van der Hulst and D. J. Pisano and kasia Malek and Lucia Marchetti and Mattia Vaccari and Matt Jarvis and Maarten Baes and Martin Meyer and Elizabeth A. K. Adams and Jacinta Delhaize and Hao Chen and Sambatriniaina Rajohnson and Sushma Kurapati and Ian Heywood and Lourdes Verdes-Montenegro},
journal= {arXiv preprint arXiv:2303.09371},
year = {2023}
}
Comments
14 pages, 10 figures. Accepted for publication in MNRAS