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14 October 2024 |
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Article overview
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Environmental effects in Herschel observations of the ionized carbon content of star forming dwarf galaxies in the Virgo cluster | | Robert Minchin
; Dario Fadda
; Rhys Taylor
; Boris Deshev
; Jonathan Davies
; | | Date: |
1 Jun 2022 | | Abstract: | We use archival Herschel data to examine the singly ionized carbon ([CII])
content of 14 star forming dwarf galaxies in the Virgo cluster. We use spectral
energy distribution (SED) fits to far infrared, mid infrared, near infrared,
optical and ultraviolet data to derive the total infrared continuum (TIR) for
these galaxies. We compare the [CII]/TIR ratio for dwarf galaxies in the
central part of Virgo to those in the southern part of the cluster and to
galaxies with similar TIR luminosities and metallicities in the Herschel Dwarf
Galaxy Survey (DGS) sample of field dwarf galaxies to look for signs of [CII]
formation independent of star formation. Our analysis indicates that the sample
of Virgo dwarfs in the central part of the cluster has significantly higher
values of [CII]/TIR than the sample from the southern part of the cluster and
the sample from the DGS, while the southern sample is consistent with the DGS.
This [CII]/TIR excess implies that a significant fraction of the [CII] in the
dwarf galaxies in the cluster center has an origin other than star formation
and is likely to be due to environmental processes in the central part of the
cluster. We also find a surprisingly strong correlation between [CII]/TIR and
the local ram pressure felt by the dwarf galaxies in the cluster. In this
respect, we claim that the excess [CII] we see in these galaxies is likely to
be due to formation in ram pressure shocks. | | Source: | arXiv, 2206.00155 | | Services: | Forum | Review | PDF | Favorites | |
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