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| Main Authors: | , |
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| Format: | Preprint |
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2023
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| Online Access: | https://arxiv.org/abs/2306.00255 |
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| _version_ | 1866916203936612352 |
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| author | Singh, Justin Haque, Shirin |
| author_facet | Singh, Justin Haque, Shirin |
| contents | This study investigates the anomalies associated with redshifts from emission lines in certain quasar candidates and the viability of a blueshift interpretation instead. The sample was taken from the Million Quasars Catalog (MILLIQUAS), representing the unidentified class with a redshift greater than 1. This sample was further constrained to those with spectra available, giving 208 candidates in total. This paper presents results on the sample, with the reported redshifts and the proposed blueshift interpretation. A subset of 38% of the sample was further analyzed using the best redshift interpretation of the emission lines from our analysis, which differed from the reported redshifts, in comparison with the blueshift interpretation. The number of unidentified lines under each interpretation was compared and was found to be statistically different with a P-value < 0.05, with a larger number of unidentified lines under the redshift interpretation. The average spread values were also compared and found to be statistically different with a P-value < 0.05, with blueshift having the smallest spread. Eighty-eight percent (88%) of the analyzed sample, that is 183 quasar candidates, provided an overall better interpretation under the blueshift hypothesis, 9%, which is 19 candidates, had a better interpretation under the redshift hypothesis and 3%, which is 6 candidates, had no identifiable lines. This indicates the importance to consider this possibility as well in light of new discoveries such as the discovery of multiple quasar systems that can lead to ejections, which has implications for the dynamics of quasars and the line of sight. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2306_00255 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Revisiting Blueshift Interpretation In Light Of Recent Discovery Of Multiple Systems Of Quasars Singh, Justin Haque, Shirin Astrophysics of Galaxies This study investigates the anomalies associated with redshifts from emission lines in certain quasar candidates and the viability of a blueshift interpretation instead. The sample was taken from the Million Quasars Catalog (MILLIQUAS), representing the unidentified class with a redshift greater than 1. This sample was further constrained to those with spectra available, giving 208 candidates in total. This paper presents results on the sample, with the reported redshifts and the proposed blueshift interpretation. A subset of 38% of the sample was further analyzed using the best redshift interpretation of the emission lines from our analysis, which differed from the reported redshifts, in comparison with the blueshift interpretation. The number of unidentified lines under each interpretation was compared and was found to be statistically different with a P-value < 0.05, with a larger number of unidentified lines under the redshift interpretation. The average spread values were also compared and found to be statistically different with a P-value < 0.05, with blueshift having the smallest spread. Eighty-eight percent (88%) of the analyzed sample, that is 183 quasar candidates, provided an overall better interpretation under the blueshift hypothesis, 9%, which is 19 candidates, had a better interpretation under the redshift hypothesis and 3%, which is 6 candidates, had no identifiable lines. This indicates the importance to consider this possibility as well in light of new discoveries such as the discovery of multiple quasar systems that can lead to ejections, which has implications for the dynamics of quasars and the line of sight. |
| title | Revisiting Blueshift Interpretation In Light Of Recent Discovery Of Multiple Systems Of Quasars |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2306.00255 |