The selective effect of environment on the atomic and molecular gas-to-dust ratio of nearby galaxies in the Herschel Reference Survey

Luca Cortese, Kenji Bekki, A. Boselli, Barbara Catinella, L. Ciesla, T.M. Hughes, M. Baes, G.J. Bendo, M. Boquien, I. De Looze, M.W.L. Smith, L. Spinoglio, S. Viaene

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    Abstract

    © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.We combine dust, atomic (H i) and molecular (H2) hydrogen mass measurements for 176 galaxies in the Herschel Reference Survey to investigate the effect of environment on the gas-to-dust mass (Mgas/Mdust) ratio of nearby galaxies. We find that, at fixed stellar mass, the average Mgas/Mdust ratio varies by no more than a factor of ~2 when moving from field to cluster galaxies, with Virgo galaxies being slightly more dust rich (per unit of gas) than isolated systems. Remarkably, once the molecular and atomic hydrogen phases are investigated separately, we find that H i-deficient galaxies have at the same time lower MHI/Mdust ratio but higher MH2/ Mdust ratio than H i-normal systems. In other words, they are poorer in atomic but richer in molecular hydrogen if normalized to their dust content. By comparing our findings with the predictions of theoretical models, we show that the opposite behaviour observed in the MHI/Mdust and MH2/Mdust ratios is fully consistent with outside-in stripping of the interstellar medium (ISM), and is simply a consequence of the different distribution of dust, H i and H2 across the disc. Our results demonstrate that the small environmental variations in the total Mgas/Mdust ratio, as well as in the gas-phase metallicity, do not automatically imply that environmental mechanisms are not able to affect the dust and metal content of the ISM in galaxies.
    Original languageEnglish
    Pages (from-to)3574-3584
    JournalMonthly Notices of the Royal Astronomical Society
    Volume459
    Issue number4
    DOIs
    Publication statusPublished - 2016

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    monatomic gases
    molecular gases
    dust
    galaxies
    gas
    hydrogen
    stripping
    gases
    metallicity
    effect
    vapor phases
    metal
    prediction
    predictions
    metals

    Cite this

    Cortese, Luca ; Bekki, Kenji ; Boselli, A. ; Catinella, Barbara ; Ciesla, L. ; Hughes, T.M. ; Baes, M. ; Bendo, G.J. ; Boquien, M. ; De Looze, I. ; Smith, M.W.L. ; Spinoglio, L. ; Viaene, S. / The selective effect of environment on the atomic and molecular gas-to-dust ratio of nearby galaxies in the Herschel Reference Survey. In: Monthly Notices of the Royal Astronomical Society. 2016 ; Vol. 459, No. 4. pp. 3574-3584.
    @article{cd64c9fb1c9b45058f106cbe419d5efe,
    title = "The selective effect of environment on the atomic and molecular gas-to-dust ratio of nearby galaxies in the Herschel Reference Survey",
    abstract = "{\circledC} 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.We combine dust, atomic (H i) and molecular (H2) hydrogen mass measurements for 176 galaxies in the Herschel Reference Survey to investigate the effect of environment on the gas-to-dust mass (Mgas/Mdust) ratio of nearby galaxies. We find that, at fixed stellar mass, the average Mgas/Mdust ratio varies by no more than a factor of ~2 when moving from field to cluster galaxies, with Virgo galaxies being slightly more dust rich (per unit of gas) than isolated systems. Remarkably, once the molecular and atomic hydrogen phases are investigated separately, we find that H i-deficient galaxies have at the same time lower MHI/Mdust ratio but higher MH2/ Mdust ratio than H i-normal systems. In other words, they are poorer in atomic but richer in molecular hydrogen if normalized to their dust content. By comparing our findings with the predictions of theoretical models, we show that the opposite behaviour observed in the MHI/Mdust and MH2/Mdust ratios is fully consistent with outside-in stripping of the interstellar medium (ISM), and is simply a consequence of the different distribution of dust, H i and H2 across the disc. Our results demonstrate that the small environmental variations in the total Mgas/Mdust ratio, as well as in the gas-phase metallicity, do not automatically imply that environmental mechanisms are not able to affect the dust and metal content of the ISM in galaxies.",
    author = "Luca Cortese and Kenji Bekki and A. Boselli and Barbara Catinella and L. Ciesla and T.M. Hughes and M. Baes and G.J. Bendo and M. Boquien and {De Looze}, I. and M.W.L. Smith and L. Spinoglio and S. Viaene",
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    doi = "10.1093/mnras/stw801",
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    pages = "3574--3584",
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    The selective effect of environment on the atomic and molecular gas-to-dust ratio of nearby galaxies in the Herschel Reference Survey. / Cortese, Luca; Bekki, Kenji; Boselli, A.; Catinella, Barbara; Ciesla, L.; Hughes, T.M.; Baes, M.; Bendo, G.J.; Boquien, M.; De Looze, I.; Smith, M.W.L.; Spinoglio, L.; Viaene, S.

    In: Monthly Notices of the Royal Astronomical Society, Vol. 459, No. 4, 2016, p. 3574-3584.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - The selective effect of environment on the atomic and molecular gas-to-dust ratio of nearby galaxies in the Herschel Reference Survey

    AU - Cortese, Luca

    AU - Bekki, Kenji

    AU - Boselli, A.

    AU - Catinella, Barbara

    AU - Ciesla, L.

    AU - Hughes, T.M.

    AU - Baes, M.

    AU - Bendo, G.J.

    AU - Boquien, M.

    AU - De Looze, I.

    AU - Smith, M.W.L.

    AU - Spinoglio, L.

    AU - Viaene, S.

    PY - 2016

    Y1 - 2016

    N2 - © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.We combine dust, atomic (H i) and molecular (H2) hydrogen mass measurements for 176 galaxies in the Herschel Reference Survey to investigate the effect of environment on the gas-to-dust mass (Mgas/Mdust) ratio of nearby galaxies. We find that, at fixed stellar mass, the average Mgas/Mdust ratio varies by no more than a factor of ~2 when moving from field to cluster galaxies, with Virgo galaxies being slightly more dust rich (per unit of gas) than isolated systems. Remarkably, once the molecular and atomic hydrogen phases are investigated separately, we find that H i-deficient galaxies have at the same time lower MHI/Mdust ratio but higher MH2/ Mdust ratio than H i-normal systems. In other words, they are poorer in atomic but richer in molecular hydrogen if normalized to their dust content. By comparing our findings with the predictions of theoretical models, we show that the opposite behaviour observed in the MHI/Mdust and MH2/Mdust ratios is fully consistent with outside-in stripping of the interstellar medium (ISM), and is simply a consequence of the different distribution of dust, H i and H2 across the disc. Our results demonstrate that the small environmental variations in the total Mgas/Mdust ratio, as well as in the gas-phase metallicity, do not automatically imply that environmental mechanisms are not able to affect the dust and metal content of the ISM in galaxies.

    AB - © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.We combine dust, atomic (H i) and molecular (H2) hydrogen mass measurements for 176 galaxies in the Herschel Reference Survey to investigate the effect of environment on the gas-to-dust mass (Mgas/Mdust) ratio of nearby galaxies. We find that, at fixed stellar mass, the average Mgas/Mdust ratio varies by no more than a factor of ~2 when moving from field to cluster galaxies, with Virgo galaxies being slightly more dust rich (per unit of gas) than isolated systems. Remarkably, once the molecular and atomic hydrogen phases are investigated separately, we find that H i-deficient galaxies have at the same time lower MHI/Mdust ratio but higher MH2/ Mdust ratio than H i-normal systems. In other words, they are poorer in atomic but richer in molecular hydrogen if normalized to their dust content. By comparing our findings with the predictions of theoretical models, we show that the opposite behaviour observed in the MHI/Mdust and MH2/Mdust ratios is fully consistent with outside-in stripping of the interstellar medium (ISM), and is simply a consequence of the different distribution of dust, H i and H2 across the disc. Our results demonstrate that the small environmental variations in the total Mgas/Mdust ratio, as well as in the gas-phase metallicity, do not automatically imply that environmental mechanisms are not able to affect the dust and metal content of the ISM in galaxies.

    U2 - 10.1093/mnras/stw801

    DO - 10.1093/mnras/stw801

    M3 - Article

    VL - 459

    SP - 3574

    EP - 3584

    JO - Monthly Notices of the Royal Astronomical Society

    JF - Monthly Notices of the Royal Astronomical Society

    SN - 0035-8711

    IS - 4

    ER -