File:Damped Lyman alpha absorber, QSO APM 08279+5255 (noao-04794).tiff
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Our best tracer of cold gas at high redshift is damped Lyman alpha absorbers (DLAs).
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[edit]DescriptionDamped Lyman alpha absorber, QSO APM 08279+5255 (noao-04794).tiff |
English: Our best tracer of cold gas at high redshift is damped Lyman alpha absorbers (DLAs). The KPNO Mayall 4-meter telescope has been used to study DLA fields, and this picture shows the eight-by-eight arc minute central region of one such field, towards the quasar (QSO) known picturesquely as APM 08279+5255. The QSO appears red in this BVI image due to its redshift (z=3.91). There are about seven Lyman break galaxies (LBGs) with redshifts similar to that of the DLA in the portion of the field shown. The full MOSAIC camera data covers more than thirty arc minutes square, corresponding to forty-by-forty megaparsecs, enabling the science team to probe the clustering of LBGs around DLAs on scales of five to ten megaparsecs. See the March 2004 NOAO Newsletter (currently only available in PDF format). |
Date | 30 June 2020, 21:53:00 (upload date) |
Source | Damped Lyman alpha absorber, QSO APM 08279+5255 |
Author | NOIRLab/NSF/AURA |
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Image title | Our best tracer of cold gas at high redshift is damped Lyman alpha absorbers (DLAs). The KPNO Mayall 4-meter telescope has been used to study DLA fields, and this picture shows the eight-by-eight arc minute central region of one such field, towards the quasar (QSO) known picturesquely as APM 08279+5255. The QSO appears red in this BVI image due to its redshift (z=3.91). There are about seven Lyman break galaxies (LBGs) with redshifts similar to that of the DLA in the portion of the field shown. The full MOSAIC camera data covers more than thirty arc minutes square, corresponding to forty-by-forty megaparsecs, enabling the science team to probe the clustering of LBGs around DLAs on scales of five to ten megaparsecs. See the March 2004 NOAO Newsletter (currently only available in PDF format). |
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Width | 1,254 px |
Height | 1,356 px |
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Compression scheme | LZW |
Pixel composition | RGB |
Number of components | 3 |
Number of rows per strip | 69 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CS Macintosh |
File change date and time | 16:25, 24 March 2004 |
Color space | Uncalibrated |