Radio continuum observations of Class I protostellar discs in Taurus: constraining the greybody tail at centimetre wavelengths
We present deep 1.8 cm (16 GHz) radio continuum imaging of seven young stellar objects in the Taurus molecular cloud. These objects have previously been extensively studied in the submm to near-infrared range and their spectral energy distributions modelled to provide reliable physical and geometric...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal Article |
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Oxford University Press
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/25549 |
| _version_ | 1848751740455747584 |
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| author | Scaife, A. Buckle, J. Ainsworth, R. Davies, M. Franzen, Thomas Grainge, K. Hobson, M. Hurley-Walker, Natasha Lasenby, A. Olamaie, M. Perrott, Y. Pooley, G. Ray, T. Richer, J. Rodriguez-Gonzalvez, C. Saunders, R. Schammel, M. Scott, P. Shimwell, T. Titterington, D. Waldram, E. |
| author_facet | Scaife, A. Buckle, J. Ainsworth, R. Davies, M. Franzen, Thomas Grainge, K. Hobson, M. Hurley-Walker, Natasha Lasenby, A. Olamaie, M. Perrott, Y. Pooley, G. Ray, T. Richer, J. Rodriguez-Gonzalvez, C. Saunders, R. Schammel, M. Scott, P. Shimwell, T. Titterington, D. Waldram, E. |
| author_sort | Scaife, A. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We present deep 1.8 cm (16 GHz) radio continuum imaging of seven young stellar objects in the Taurus molecular cloud. These objects have previously been extensively studied in the submm to near-infrared range and their spectral energy distributions modelled to provide reliable physical and geometrical parameters. We use these new data to constrain the properties of the long-wavelength tail of the greybody spectrum, which is expected to be dominated by emission from large dust grains in the protostellar disc. We find spectra consistent with the opacity indices expected for such a population, with an average opacity index of beta= 0.26 +/- 0.22 indicating grain growth within the discs. We use spectra fitted jointly to radio and submm data to separate the contributions from thermal dust and radio emission at 1.8 cm and derive disc masses directly from the cm-wave dust contribution. We find that disc masses derived from these flux densities under assumptions consistent with the literature are systematically higher than those calculated from submm data, and meet the criteria for giant planet formation in a number of cases. |
| first_indexed | 2025-11-14T07:57:32Z |
| format | Journal Article |
| id | curtin-20.500.11937-25549 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:57:32Z |
| publishDate | 2012 |
| publisher | Oxford University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-255492017-09-13T15:17:40Z Radio continuum observations of Class I protostellar discs in Taurus: constraining the greybody tail at centimetre wavelengths Scaife, A. Buckle, J. Ainsworth, R. Davies, M. Franzen, Thomas Grainge, K. Hobson, M. Hurley-Walker, Natasha Lasenby, A. Olamaie, M. Perrott, Y. Pooley, G. Ray, T. Richer, J. Rodriguez-Gonzalvez, C. Saunders, R. Schammel, M. Scott, P. Shimwell, T. Titterington, D. Waldram, E. clouds stars radiation mechanisms ISM general formation We present deep 1.8 cm (16 GHz) radio continuum imaging of seven young stellar objects in the Taurus molecular cloud. These objects have previously been extensively studied in the submm to near-infrared range and their spectral energy distributions modelled to provide reliable physical and geometrical parameters. We use these new data to constrain the properties of the long-wavelength tail of the greybody spectrum, which is expected to be dominated by emission from large dust grains in the protostellar disc. We find spectra consistent with the opacity indices expected for such a population, with an average opacity index of beta= 0.26 +/- 0.22 indicating grain growth within the discs. We use spectra fitted jointly to radio and submm data to separate the contributions from thermal dust and radio emission at 1.8 cm and derive disc masses directly from the cm-wave dust contribution. We find that disc masses derived from these flux densities under assumptions consistent with the literature are systematically higher than those calculated from submm data, and meet the criteria for giant planet formation in a number of cases. 2012 Journal Article http://hdl.handle.net/20.500.11937/25549 10.1111/j.1365-2966.2011.20254.x Oxford University Press fulltext |
| spellingShingle | clouds stars radiation mechanisms ISM general formation Scaife, A. Buckle, J. Ainsworth, R. Davies, M. Franzen, Thomas Grainge, K. Hobson, M. Hurley-Walker, Natasha Lasenby, A. Olamaie, M. Perrott, Y. Pooley, G. Ray, T. Richer, J. Rodriguez-Gonzalvez, C. Saunders, R. Schammel, M. Scott, P. Shimwell, T. Titterington, D. Waldram, E. Radio continuum observations of Class I protostellar discs in Taurus: constraining the greybody tail at centimetre wavelengths |
| title | Radio continuum observations of Class I protostellar discs in Taurus: constraining the greybody tail at centimetre wavelengths |
| title_full | Radio continuum observations of Class I protostellar discs in Taurus: constraining the greybody tail at centimetre wavelengths |
| title_fullStr | Radio continuum observations of Class I protostellar discs in Taurus: constraining the greybody tail at centimetre wavelengths |
| title_full_unstemmed | Radio continuum observations of Class I protostellar discs in Taurus: constraining the greybody tail at centimetre wavelengths |
| title_short | Radio continuum observations of Class I protostellar discs in Taurus: constraining the greybody tail at centimetre wavelengths |
| title_sort | radio continuum observations of class i protostellar discs in taurus: constraining the greybody tail at centimetre wavelengths |
| topic | clouds stars radiation mechanisms ISM general formation |
| url | http://hdl.handle.net/20.500.11937/25549 |