TY - JOUR
T1 - DIISC-I
T2 - The Discovery of Kinematically Anomalous Hi Clouds in M 100
AU - Gim, Hansung B.
AU - Borthakur, Sanchayeeta
AU - Momjian, Emmanuel
AU - Padave, Mansi
AU - Jansen, Rolf A.
AU - Nelson, Dylan
AU - Heckman, Timothy M.
AU - Kennicutt, Robert C.
AU - Fox, Andrew J.
AU - Pineda, Jorge L.
AU - Thilker, David
AU - Kauffmann, Guinevere
AU - Tumlinson, Jason
N1 - Publisher Copyright:
© 2021. The American Astronomical Society. All rights reserved.
PY - 2021/11/20
Y1 - 2021/11/20
N2 - We report the discovery of two kinematically anomalous atomic hydrogen (H i) clouds in M 100 (NGC 4321), which was observed as part of the Deciphering the Interplay between the Interstellar medium, Stars, and the Circumgalactic medium (DIISC) survey in H i 21 cm at 3.3 km s-1 spectroscopic and 44″ × 30″ spatial resolution using the Karl G. Jansky Very Large Array.15 These clouds were identified as structures that show significant kinematic offsets from the rotating disk of M 100. The velocity offsets of 40 km s-1 observed in these clouds are comparable to the offsets seen in intermediate-velocity clouds (IVCs) in the circumgalactic medium (CGM) of the Milky Way and nearby galaxies. We find that one anomalous cloud in M 100 is associated with star-forming regions detected in Hα and far-ultraviolet imaging. Our investigation shows that anomalous clouds in M 100 may originate from multiple mechanisms, such as star formation feedback-driven outflows, ram pressure stripping, and tidal interactions with satellite galaxies. Moreover, we do not detect any cool CGM at 38.8 kpc from the center of M 100, giving an upper limit of N(H i) ≤1.7 × 1013 cm-2 (3σ). Since M 100 is in the Virgo cluster, the nonexistence of neutral/cool CGM is a likely pathway for turning it into a red galaxy.
AB - We report the discovery of two kinematically anomalous atomic hydrogen (H i) clouds in M 100 (NGC 4321), which was observed as part of the Deciphering the Interplay between the Interstellar medium, Stars, and the Circumgalactic medium (DIISC) survey in H i 21 cm at 3.3 km s-1 spectroscopic and 44″ × 30″ spatial resolution using the Karl G. Jansky Very Large Array.15 These clouds were identified as structures that show significant kinematic offsets from the rotating disk of M 100. The velocity offsets of 40 km s-1 observed in these clouds are comparable to the offsets seen in intermediate-velocity clouds (IVCs) in the circumgalactic medium (CGM) of the Milky Way and nearby galaxies. We find that one anomalous cloud in M 100 is associated with star-forming regions detected in Hα and far-ultraviolet imaging. Our investigation shows that anomalous clouds in M 100 may originate from multiple mechanisms, such as star formation feedback-driven outflows, ram pressure stripping, and tidal interactions with satellite galaxies. Moreover, we do not detect any cool CGM at 38.8 kpc from the center of M 100, giving an upper limit of N(H i) ≤1.7 × 1013 cm-2 (3σ). Since M 100 is in the Virgo cluster, the nonexistence of neutral/cool CGM is a likely pathway for turning it into a red galaxy.
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U2 - 10.3847/1538-4357/ac2303
DO - 10.3847/1538-4357/ac2303
M3 - Article
AN - SCOPUS:85120669050
SN - 0004-637X
VL - 922
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 69
ER -