TY - JOUR
T1 - Star formation activity of galaxies undergoing ram pressure stripping in the virgo cluster
AU - Mun, Jae Yeon
AU - Hwang, Ho Seong
AU - Lee, Myung Gyoon
AU - Chung, Aeree
AU - Yoon, Hyein
AU - Lee, Jong Chul
N1 - Publisher Copyright:
© 2021, Korean Astronomical Society. All rights reserved.
PY - 2021
Y1 - 2021
N2 - We study galaxies undergoing ram pressure stripping in the Virgo cluster to examine whether we can identify any discernible trend in their star formation activity. We first use 48 galaxies undergoing different stages of stripping based on H i morphology, H i deficiency, and relative extent to the stellar disk, from the VIVA survey. We then employ a new scheme for galaxy classification which combines H i mass fractions and locations in projected phase space, resulting in a new sample of 365 galaxies. We utilize a variety of star formation tracers, which include g − r, WISE [3.4]–[12] colors, and starburstiness that are defined by stellar mass and star formation rates to compare the star formation activity of galaxies at different stripping stages. We find no clear evidence for enhancement in the integrated star formation activity of galaxies undergoing early to active stripping. We are instead able to capture the overall quenching of star formation activity with increasing degree of ram pressure stripping, in agreement with previous studies. Our results suggest that if there is any ram pressure stripping induced enhancement, it is at best locally modest, and galaxies undergoing enhancement make up a small fraction of the total sample. Our results also indicate that it is possible to trace galaxies at different stages of stripping with the combination of H i gas content and location in projected phase space, which can be extended to other galaxy clusters that lack high-resolution H i imaging.
AB - We study galaxies undergoing ram pressure stripping in the Virgo cluster to examine whether we can identify any discernible trend in their star formation activity. We first use 48 galaxies undergoing different stages of stripping based on H i morphology, H i deficiency, and relative extent to the stellar disk, from the VIVA survey. We then employ a new scheme for galaxy classification which combines H i mass fractions and locations in projected phase space, resulting in a new sample of 365 galaxies. We utilize a variety of star formation tracers, which include g − r, WISE [3.4]–[12] colors, and starburstiness that are defined by stellar mass and star formation rates to compare the star formation activity of galaxies at different stripping stages. We find no clear evidence for enhancement in the integrated star formation activity of galaxies undergoing early to active stripping. We are instead able to capture the overall quenching of star formation activity with increasing degree of ram pressure stripping, in agreement with previous studies. Our results suggest that if there is any ram pressure stripping induced enhancement, it is at best locally modest, and galaxies undergoing enhancement make up a small fraction of the total sample. Our results also indicate that it is possible to trace galaxies at different stages of stripping with the combination of H i gas content and location in projected phase space, which can be extended to other galaxy clusters that lack high-resolution H i imaging.
KW - Galaxies: clusters: general
KW - Galaxies: clusters: individual (Virgo)
KW - Galaxies: evolution
KW - Galaxies: star formation
UR - http://www.scopus.com/inward/record.url?scp=85102570291&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85102570291&partnerID=8YFLogxK
U2 - 10.5303/JKAS.2021.54.1.17
DO - 10.5303/JKAS.2021.54.1.17
M3 - Article
AN - SCOPUS:85102570291
SN - 1225-4614
VL - 54
SP - 17
EP - 35
JO - Journal of the Korean Astronomical Society
JF - Journal of the Korean Astronomical Society
IS - 1
ER -