تقرير
On the expected purity of photometric galaxy surveys targeting the Cosmic Dawn
| العنوان: | On the expected purity of photometric galaxy surveys targeting the Cosmic Dawn |
|---|---|
| المؤلفون: | Furlanetto, Steven R., Mirocha, Jordan |
| سنة النشر: | 2022 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies |
| الوصف: | Over the last three decades, photometric galaxy selection using the Lyman-break technique has transformed our understanding of the high-z Universe, providing large samples of galaxies at 3 < z < 8 with relatively small contamination. With the advent of the James Webb Space Telescope, the Lyman-break technique has now been extended to z ~ 17. However, the purity of the resulting samples has not been tested. Here we use a simple model, built on the robust foundation of the dark matter halo mass function, to show that the expected level of contamination rises dramatically at z > 10, especially for luminous galaxies, placing stringent requirements on the selection process. The most luminous sources at z > 12 are likely at least ten thousand times rarer than potential contaminants, so extensive spectroscopic followup campaigns may be required to identify a small number of target sources. Comment: 6 pages, 2 figures, submitted to MNRAS |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1093/mnras/stad1799 |
| الوصول الحر: | http://arxiv.org/abs/2208.12828Test |
| رقم الانضمام: | edsarx.2208.12828 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1093/mnras/stad1799 |
|---|