Galaxy Zoo: Bar Lengths in Nearby Disk Galaxies
We present an analysis of bar length measurements of 3150 local galaxies in a volume limited sample of low redshift (z < 0.06) disk galaxies. Barred galaxies were initially selected from the Galaxy Zoo 2 project, and the lengths and widths of the bars were manually drawn by members of the Gal...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal article |
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2011
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| _version_ | 1797073306461929472 |
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| author | Hoyle, B Masters, K Nichol, R Edmondson, E Smith, A Lintott, C Scranton, R Bamford, S Schawinski, K Thomas, D |
| author_facet | Hoyle, B Masters, K Nichol, R Edmondson, E Smith, A Lintott, C Scranton, R Bamford, S Schawinski, K Thomas, D |
| author_sort | Hoyle, B |
| collection | OXFORD |
| description | We present an analysis of bar length measurements of 3150 local galaxies in a volume limited sample of low redshift (z < 0.06) disk galaxies. Barred galaxies were initially selected from the Galaxy Zoo 2 project, and the lengths and widths of the bars were manually drawn by members of the Galaxy Zoo community using a Google Maps interface. Bars were measured independently by different observers, multiple times per galaxy (>=3), and we find that observers were able to reproduce their own bar lengths to 3% and each others' to better than 20%. We find a "color bimodality" in our disk galaxy population with bar length, i.e., longer bars inhabit redder disk galaxies and the bars themselves are redder, and that the bluest galaxies host the smallest galactic bars (< 5 kpc/h). We also find that bar and disk colors are clearly correlated, and for galaxies with small bars, the disk is, on average, redder than the bar colors, while for longer bars the bar then itself is redder, on average, than the disk. We further find that galaxies with a prominent bulge are more likely to host longer bars than those without bulges. We categorise our galaxy populations by how the bar and/or ring are connected to the spiral arms. We find that galaxies whose bars are directly connected to the spiral arms are preferentially bluer and that these galaxies host typically shorter bars. Within the scatter, we find that stronger bars are found in galaxies which host a ring (and only a ring). The bar length and width measurements used herein are made publicly available for others to use (http://data.galaxyzoo.org). |
| first_indexed | 2024-03-06T23:20:11Z |
| format | Journal article |
| id | oxford-uuid:68774413-c8c2-4535-8178-91fb1a41f9c7 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T23:20:11Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | oxford-uuid:68774413-c8c2-4535-8178-91fb1a41f9c72022-03-26T18:45:03ZGalaxy Zoo: Bar Lengths in Nearby Disk GalaxiesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:68774413-c8c2-4535-8178-91fb1a41f9c7Symplectic Elements at Oxford2011Hoyle, BMasters, KNichol, REdmondson, ESmith, ALintott, CScranton, RBamford, SSchawinski, KThomas, DWe present an analysis of bar length measurements of 3150 local galaxies in a volume limited sample of low redshift (z < 0.06) disk galaxies. Barred galaxies were initially selected from the Galaxy Zoo 2 project, and the lengths and widths of the bars were manually drawn by members of the Galaxy Zoo community using a Google Maps interface. Bars were measured independently by different observers, multiple times per galaxy (>=3), and we find that observers were able to reproduce their own bar lengths to 3% and each others' to better than 20%. We find a "color bimodality" in our disk galaxy population with bar length, i.e., longer bars inhabit redder disk galaxies and the bars themselves are redder, and that the bluest galaxies host the smallest galactic bars (< 5 kpc/h). We also find that bar and disk colors are clearly correlated, and for galaxies with small bars, the disk is, on average, redder than the bar colors, while for longer bars the bar then itself is redder, on average, than the disk. We further find that galaxies with a prominent bulge are more likely to host longer bars than those without bulges. We categorise our galaxy populations by how the bar and/or ring are connected to the spiral arms. We find that galaxies whose bars are directly connected to the spiral arms are preferentially bluer and that these galaxies host typically shorter bars. Within the scatter, we find that stronger bars are found in galaxies which host a ring (and only a ring). The bar length and width measurements used herein are made publicly available for others to use (http://data.galaxyzoo.org). |
| spellingShingle | Hoyle, B Masters, K Nichol, R Edmondson, E Smith, A Lintott, C Scranton, R Bamford, S Schawinski, K Thomas, D Galaxy Zoo: Bar Lengths in Nearby Disk Galaxies |
| title | Galaxy Zoo: Bar Lengths in Nearby Disk Galaxies |
| title_full | Galaxy Zoo: Bar Lengths in Nearby Disk Galaxies |
| title_fullStr | Galaxy Zoo: Bar Lengths in Nearby Disk Galaxies |
| title_full_unstemmed | Galaxy Zoo: Bar Lengths in Nearby Disk Galaxies |
| title_short | Galaxy Zoo: Bar Lengths in Nearby Disk Galaxies |
| title_sort | galaxy zoo bar lengths in nearby disk galaxies |
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