Gaia Data Release 3: The Galaxy in your preferred colours. Synthetic photometry from Gaia low-resolution spectra
Gaia Data Release 3 provides novel flux-calibrated low-resolution spectrophotometry for about 220 million sources in the wavelength range 330nm - 1050nm (XP spectra). Synthetic photometry directly tied to a flux in physical units can be obtained from these spectra for any passband fully enclosed in...
| Authors: | ; ; ; ; ; ; ; ; ; |
|---|---|
| Format: | Article |
| Status: | Published version |
| Publication date: | 2022 |
| Country: | España |
| Institution: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repository: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/215705 |
| Online Access: | https://hdl.handle.net/2445/215705 |
| Access Level: | Open access |
| Keyword: | Estels Fotometria Astrometria Stars Photometry Astrometry |
| _version_ | 1878733436331491328 |
|---|---|
| author | Gaia Collaboration |
| author2 | Antoja, T. (Teresa) Luri Carrascoso, Xavier Jordi i Nebot, Carme Carrasco, José Manuel (Carrasco Martínez) Monguió i Montells, Maria Masana Fresno, Eduard Castañeda Pons, Javier Bernardo Romero Gómez, Mercè Fabricius, Claus |
| author2_role | author author author author author author author author author |
| author_browse | Antoja, T. (Teresa) Carrasco, José Manuel (Carrasco Martínez) Castañeda Pons, Javier Bernardo Fabricius, Claus Gaia Collaboration Jordi i Nebot, Carme Luri Carrascoso, Xavier Masana Fresno, Eduard Monguió i Montells, Maria Romero Gómez, Mercè |
| author_facet | Gaia Collaboration Antoja, T. (Teresa) Luri Carrascoso, Xavier Jordi i Nebot, Carme Carrasco, José Manuel (Carrasco Martínez) Monguió i Montells, Maria Masana Fresno, Eduard Castañeda Pons, Javier Bernardo Romero Gómez, Mercè Fabricius, Claus |
| author_role | author |
| collection | Recercat. Dipósit de la Recerca de Catalunya |
| description | Gaia Data Release 3 provides novel flux-calibrated low-resolution spectrophotometry for about 220 million sources in the wavelength range 330nm - 1050nm (XP spectra). Synthetic photometry directly tied to a flux in physical units can be obtained from these spectra for any passband fully enclosed in this wavelength range. We describe how synthetic photometry can be obtained from XP spectra, illustrating the performance that can be achieved under a range of different conditions - for example passband width and wavelength range - as well as the limits and the problems affecting it. Existing top-quality photometry can be reproduced within a few per cent over a wide range of magnitudes and colour, for wide and medium bands, and with up to millimag accuracy when synthetic photometry is standardised with respect to these external sources. Some examples of potential scientific application are presented, including the detection of multiple populations in globular clusters, the estimation of metallicity extended to the very metal-poor regime, and the classification of white dwarfs. A catalogue providing standardised photometry for ~220 million sources in several wide bands of widely used photometric systems is provided (Gaia Synthetic Photometry Catalogue; GSPC) as well as a catalogue of ≃105 white dwarfs with DA/non-DA classification obtained with a Random Forest algorithm (Gaia Synthetic Photometry Catalogue for White Dwarfs; GSPC-WD). |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_5622ea0f8c8a4767d689bdca4d897c8d |
| institution | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| instname_str | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:recercat.cat:2445/215705 |
| publishDate | 2022 |
| publishDateSort | 2022 |
| publisher | EDP Sciences |
| publisherStr | EDP Sciences |
| reponame_str | Recercat. Dipósit de la Recerca de Catalunya |
| spelling | Gaia Data Release 3: The Galaxy in your preferred colours. Synthetic photometry from Gaia low-resolution spectra Gaia Collaboration Antoja, T. (Teresa) Luri Carrascoso, Xavier Jordi i Nebot, Carme Carrasco, José Manuel (Carrasco Martínez) Monguió i Montells, Maria Masana Fresno, Eduard Castañeda Pons, Javier Bernardo Romero Gómez, Mercè Fabricius, Claus Estels Fotometria Astrometria Stars Photometry Astrometry Gaia Data Release 3 provides novel flux-calibrated low-resolution spectrophotometry for about 220 million sources in the wavelength range 330nm - 1050nm (XP spectra). Synthetic photometry directly tied to a flux in physical units can be obtained from these spectra for any passband fully enclosed in this wavelength range. We describe how synthetic photometry can be obtained from XP spectra, illustrating the performance that can be achieved under a range of different conditions - for example passband width and wavelength range - as well as the limits and the problems affecting it. Existing top-quality photometry can be reproduced within a few per cent over a wide range of magnitudes and colour, for wide and medium bands, and with up to millimag accuracy when synthetic photometry is standardised with respect to these external sources. Some examples of potential scientific application are presented, including the detection of multiple populations in globular clusters, the estimation of metallicity extended to the very metal-poor regime, and the classification of white dwarfs. A catalogue providing standardised photometry for ~220 million sources in several wide bands of widely used photometric systems is provided (Gaia Synthetic Photometry Catalogue; GSPC) as well as a catalogue of ≃105 white dwarfs with DA/non-DA classification obtained with a Random Forest algorithm (Gaia Synthetic Photometry Catalogue for White Dwarfs; GSPC-WD). EDP Sciences https://hdl.handle.net/2445/215705 |
| spellingShingle | Gaia Data Release 3: The Galaxy in your preferred colours. Synthetic photometry from Gaia low-resolution spectra Gaia Collaboration Estels Fotometria Astrometria Stars Photometry Astrometry |
| status_str | publishedVersion |
| title | Gaia Data Release 3: The Galaxy in your preferred colours. Synthetic photometry from Gaia low-resolution spectra |
| title_full | Gaia Data Release 3: The Galaxy in your preferred colours. Synthetic photometry from Gaia low-resolution spectra |
| title_fullStr | Gaia Data Release 3: The Galaxy in your preferred colours. Synthetic photometry from Gaia low-resolution spectra |
| title_full_unstemmed | Gaia Data Release 3: The Galaxy in your preferred colours. Synthetic photometry from Gaia low-resolution spectra |
| title_short | Gaia Data Release 3: The Galaxy in your preferred colours. Synthetic photometry from Gaia low-resolution spectra |
| title_sort | Gaia Data Release 3: The Galaxy in your preferred colours. Synthetic photometry from Gaia low-resolution spectra |
| topic | Estels Fotometria Astrometria Stars Photometry Astrometry |
| topic_facet | Estels Fotometria Astrometria Stars Photometry Astrometry |
| url | https://hdl.handle.net/2445/215705 |