Herschel observations of Hickson compact groups of galaxies: Unveiling the properties of cold dust

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dc.contributor.authorBitsakis, T
dc.contributor.authorCharmandaris, V
dc.contributor.authorAppleton, P N
dc.contributor.authorDíaz-Santos, T
dc.contributor.authorLe Floc’h, E
dc.contributor.authorda Cunha, E
dc.contributor.authorAlatalo, K
dc.contributor.authorCluver, M
dc.date.accessioned2021-10-08T11:01:12Z
dc.date.available2021-10-08T11:01:12Z
dc.date.issued2014
dc.description.abstractWe present a Herschel far-IR and sub-mm study of a sample of 120 galaxies in 28 Hickson Compact Groups. Fitting their UV to sub-mm spectral energy distributions with the model of da Cunha et al. (2008), we accurately estimate the dust masses, luminosities and temperatures of the individual galaxies. We find that nearly half of the late-type galaxies in dynamically "old" groups, those with more than 25% of early-type members and redder UV-optical colours, have also significantly lower dust-to-stellar mass ratios compared to those of actively star-forming galaxies of the same mass found both in HCGs and the field. Examining their dust-to-gas mass ratios we conclude that dust was stripped out of these systems as a result of the gravitational and hydrodynamic interactions, experienced due to previous encounters with other group members. About 40% of the early-type galaxies (mostly lenticulars), in dynamically "old" groups, display dust properties similar to those of the UV-optical red late-type galaxies. Given their stellar masses, star formation rates and UV-optical colours, we suggest that red late-type and dusty lenticular galaxies represent transition populations between blue star-forming disk galaxies and quiescent early-type ellipticals. [...ABRIDGED...] Our deep Herschel observations also allow us to detect the presence of diffuse cold intragroup dust in 4 HCGs. We also find that the fraction of 250micron emission which is located outside of the main bodies of the red late-type galaxies as well as of the dusty lenticulars is 15-20% of their integrated emission at this band. All these findings are consistent with an evolutionary scenario in which gas dissipation, shocks and turbulence in addition to tidal interactions, shape the evolution of galaxies in compact groups.
dc.identifier.apacitationBitsakis, T., Charmandaris, V., Appleton, P. N., Díaz-Santos, T., , da Cunha, E., ... Cluver, M. (2014). Herschel observations of Hickson compact groups of galaxies: Unveiling the properties of cold dust. <i>Astronomy and Astrophysics</i>, 565(4), A25 - 177. http://hdl.handle.net/11427/35106en_ZA
dc.identifier.chicagocitationBitsakis, T, V Charmandaris, P N Appleton, T Díaz-Santos, , E da Cunha, K Alatalo, and M Cluver "Herschel observations of Hickson compact groups of galaxies: Unveiling the properties of cold dust." <i>Astronomy and Astrophysics</i> 565, 4. (2014): A25 - 177. http://hdl.handle.net/11427/35106en_ZA
dc.identifier.citationBitsakis, T., Charmandaris, V., Appleton, P.N., Díaz-Santos, T., , da Cunha, E., Alatalo, K. & Cluver, M. et al. 2014. Herschel observations of Hickson compact groups of galaxies: Unveiling the properties of cold dust. <i>Astronomy and Astrophysics.</i> 565(4):A25 - 177. http://hdl.handle.net/11427/35106en_ZA
dc.identifier.issn0004-6361
dc.identifier.issn1432-0746
dc.identifier.ris TY - Journal Article AU - Bitsakis, T AU - Charmandaris, V AU - Appleton, P N AU - Díaz-Santos, T AU - Le Floc’h, E AU - da Cunha, E AU - Alatalo, K AU - Cluver, M AB - We present a Herschel far-IR and sub-mm study of a sample of 120 galaxies in 28 Hickson Compact Groups. Fitting their UV to sub-mm spectral energy distributions with the model of da Cunha et al. (2008), we accurately estimate the dust masses, luminosities and temperatures of the individual galaxies. We find that nearly half of the late-type galaxies in dynamically "old" groups, those with more than 25% of early-type members and redder UV-optical colours, have also significantly lower dust-to-stellar mass ratios compared to those of actively star-forming galaxies of the same mass found both in HCGs and the field. Examining their dust-to-gas mass ratios we conclude that dust was stripped out of these systems as a result of the gravitational and hydrodynamic interactions, experienced due to previous encounters with other group members. About 40% of the early-type galaxies (mostly lenticulars), in dynamically "old" groups, display dust properties similar to those of the UV-optical red late-type galaxies. Given their stellar masses, star formation rates and UV-optical colours, we suggest that red late-type and dusty lenticular galaxies represent transition populations between blue star-forming disk galaxies and quiescent early-type ellipticals. [...ABRIDGED...] Our deep Herschel observations also allow us to detect the presence of diffuse cold intragroup dust in 4 HCGs. We also find that the fraction of 250micron emission which is located outside of the main bodies of the red late-type galaxies as well as of the dusty lenticulars is 15-20% of their integrated emission at this band. All these findings are consistent with an evolutionary scenario in which gas dissipation, shocks and turbulence in addition to tidal interactions, shape the evolution of galaxies in compact groups. DA - 2014 DB - OpenUCT DP - University of Cape Town IS - 4 J1 - Astronomy and Astrophysics LK - https://open.uct.ac.za PY - 2014 SM - 0004-6361 SM - 1432-0746 T1 - Herschel observations of Hickson compact groups of galaxies: Unveiling the properties of cold dust TI - Herschel observations of Hickson compact groups of galaxies: Unveiling the properties of cold dust UR - http://hdl.handle.net/11427/35106 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/35106
dc.identifier.vancouvercitationBitsakis T, Charmandaris V, Appleton PN, Díaz-Santos T, , da Cunha E, et al. Herschel observations of Hickson compact groups of galaxies: Unveiling the properties of cold dust. Astronomy and Astrophysics. 2014;565(4):A25 - 177. http://hdl.handle.net/11427/35106.en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Astronomy
dc.publisher.facultyFaculty of Science
dc.sourceAstronomy and Astrophysics
dc.source.journalissue4
dc.source.journalvolume565
dc.source.paginationA25 - 177
dc.source.urihttps://dx.doi.org/10.1051/0004-6361/201323349
dc.subject.othergalaxies: evolution
dc.subject.othergalaxies: interactions
dc.subject.othergalaxies: groups: general
dc.subject.otherinfrared: galaxies
dc.titleHerschel observations of Hickson compact groups of galaxies: Unveiling the properties of cold dust
dc.typeJournal Article
uct.type.publicationResearch
uct.type.resourceJournal Article
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