The dust content of high-z submillimeter galaxies revealed by Herschel
| Autor: | Francesca Pozzi, David Elbaz, Albrecht Poglitsch, M. Sanchez-Portal, Bruno Altieri, Giulia Rodighiero, Herve Aussel, Dieter Lutz, Raanan Nordon, Amélie Saintonge, Francesca Matteucci, Lijing Shao, I. Valtchanov, Ángel Bongiovanni, Andrea Cimatti, Carlotta Gruppioni, H. Dominguez-Sanchez, L. Silva, Andrea Grazian, L. Riguccini, Paola Andreani, Gian Luigi Granato, Emanuele Daddi, I. Pérez Garcia, Helmut Dannerbauer, Francesco Calura, Roberto Maiolino, S. Berta, Adriano Fontana, Antonio Cava, Linda J. Tacconi, Reinhard Genzel, J. Cepa, Georgios E. Magdis, Manuela Magliocchetti, Paola Popesso, Drew Brisbin, N. M. Förster Schreiber, Paola Santini, E. Sturm, Benjamin Magnelli |
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| Přispěvatelé: | Santini P., Maiolino R., Magnelli B., Silva L., Grazian A., Altieri B., Andreani P., Aussel H., Berta S., Bongiovanni A., Brisbin D., Calura F., Cava A., Cepa J., Cimatti A., Daddi E., Dannerbauer H., Dominguez-Sanchez H., Elbaz D., Fontana A., Förster Schreiber N., Genzel R., Granato G. L., Gruppioni C., Lutz D., Magdis G., Magliocchetti M., Matteucci F., Nordon R., Pérez Garcia I., Poglitsch A., Popesso P., Pozzi F., Riguccini L., Rodighiero G., Saintonge A., Sanchez-Portal M., Shao L., Sturm E., Tacconi L., Valtchanov I., Santini, P., Maiolino, R., Magnelli, B., Silva, L., Grazian, A., Altieri, B., Andreani, P., Aussel, H., Berta, S., Bongiovanni, A., Brisbin, D., Calura, F., Cava, A., Cepa, J., Cimatti, A., Daddi, E., Dannerbauer, H., Dominguez Sanchez, H., Elbaz, D., Fontana, A., Förster Schreiber, N., Genzel, R., Granato, G. L., Gruppioni, C., Lutz, D., Magdis, G., Magliocchetti, M., Matteucci, MARIA FRANCESCA, Nordon, R., Pérez Garcia, I., Poglitsch, A., Popesso, P., Pozzi, F., Riguccini, L., Rodighiero, G., Saintonge, A., Sanchez Portal, M., Shao, L., Sturm, E., Tacconi, L., Valtchanov, I. Affiliation |
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
submillimeter: galaxies
Cosmology and Nongalactic Astrophysics (astro-ph.CO) media_common.quotation_subject galaxies [submillimeter] FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics infrared: galaxies galaxies: high-redshift galaxies: evolution galaxies: ISM Astrophysics::Solar and Stellar Astrophysics evolution [galaxies] Astrophysics::Galaxy Astrophysics media_common Physics Luminous infrared galaxy Spiral galaxy ISM [galaxies] Spectrometer Astronomy and Astrophysics Galaxy Universe galaxie [infrared] On board Space and Planetary Science Content (measure theory) Astrophysics::Earth and Planetary Astrophysics high-redshift [galaxies] Order of magnitude Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 1432-0746 0004-6361 |
| Popis: | We use deep observations taken with the Photodetector Array Camera and Spectrometer (PACS), on board the Herschel satellite as part of the PACS evolutionary probe (PEP) guaranteed project along with submm ground-based observations to measure the dust mass of a sample of high-z submillimeter galaxies (SMGs). We investigate their dust content relative to their stellar and gas masses, and compare them with local star-forming galaxies. High-z SMGs are dust rich, i.e. they have higher dust-to-stellar mass ratios compared to local spiral galaxies (by a factor of 30) and also compared to local ultraluminous infrared galaxies (ULIRGs, by a factor of 6). This indicates that the large masses of gas typically hosted in SMGs have already been highly enriched with metals and dust. Indeed, for those SMGs whose gas mass is measured, we infer dust-to-gas ratios similar or higher than local spirals and ULIRGs. However, similarly to other strongly star-forming galaxies in the local Universe and at high-z, SMGs are characterized by gas metalicities lower (by a factor of a few) than local spirals, as inferred from their optical nebular lines, which are generally ascribed to infall of metal-poor gas. This is in contrast with the large dust content inferred from the far-IR and submm data. In short, the metalicity inferred from the dust mass is much higher (by more than an order of magnitude) than that inferred from the optical nebular lines. We discuss the possible explanations of this discrepancy and the possible implications for the investigation of the metalicity evolution at high-z. Comment: Accepted for publication in Astronomy & Astrophysics Letters. One reference updated |
| Databáze: | OpenAIRE |
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