Constraining the AGN Luminosity Function from JWST with the X-Ray Background
We predict the X-ray background (XRB) expected from the population of quasars detected by the James Webb Space Telescope spectroscopic surveys over the redshift range z ∼ 4–7. We find that the measured UV emissivities imply a ∼10 times higher unresolved XRB than constrained by current experiments. W...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2023-01-01
|
| Series: | The Astrophysical Journal Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/2041-8213/ad09ac |
| _version_ | 1797627454018289664 |
|---|---|
| author | Hamsa Padmanabhan Abraham Loeb |
| author_facet | Hamsa Padmanabhan Abraham Loeb |
| author_sort | Hamsa Padmanabhan |
| collection | DOAJ |
| description | We predict the X-ray background (XRB) expected from the population of quasars detected by the James Webb Space Telescope spectroscopic surveys over the redshift range z ∼ 4–7. We find that the measured UV emissivities imply a ∼10 times higher unresolved XRB than constrained by current experiments. We illustrate the difficulty of simultaneously matching the faint end of the quasar luminosity function and the XRB constraints. We discuss possible origins and consequences of this discrepancy. |
| first_indexed | 2024-03-11T10:25:28Z |
| format | Article |
| id | doaj.art-29eb6248f19f4c05a75b038d0ce14007 |
| institution | Directory Open Access Journal |
| issn | 2041-8205 |
| language | English |
| last_indexed | 2024-03-11T10:25:28Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal Letters |
| spelling | doaj.art-29eb6248f19f4c05a75b038d0ce140072023-11-15T16:01:11ZengIOP PublishingThe Astrophysical Journal Letters2041-82052023-01-019581L710.3847/2041-8213/ad09acConstraining the AGN Luminosity Function from JWST with the X-Ray BackgroundHamsa Padmanabhan0https://orcid.org/0000-0002-8800-5740Abraham Loeb1https://orcid.org/0000-0003-4330-287XDépartement de Physique Théorique, Université de Genève , 24 quai Ernest-Ansermet, CH 1211 Genève 4, Switzerland ; hamsa.padmanabhan@unige.chAstronomy department, Harvard University , 60 Garden Street, Cambridge, MA 02138, USA ; aloeb@cfa.harvard.eduWe predict the X-ray background (XRB) expected from the population of quasars detected by the James Webb Space Telescope spectroscopic surveys over the redshift range z ∼ 4–7. We find that the measured UV emissivities imply a ∼10 times higher unresolved XRB than constrained by current experiments. We illustrate the difficulty of simultaneously matching the faint end of the quasar luminosity function and the XRB constraints. We discuss possible origins and consequences of this discrepancy.https://doi.org/10.3847/2041-8213/ad09acCosmologyQuasarsDiffuse x-ray background |
| spellingShingle | Hamsa Padmanabhan Abraham Loeb Constraining the AGN Luminosity Function from JWST with the X-Ray Background The Astrophysical Journal Letters Cosmology Quasars Diffuse x-ray background |
| title | Constraining the AGN Luminosity Function from JWST with the X-Ray Background |
| title_full | Constraining the AGN Luminosity Function from JWST with the X-Ray Background |
| title_fullStr | Constraining the AGN Luminosity Function from JWST with the X-Ray Background |
| title_full_unstemmed | Constraining the AGN Luminosity Function from JWST with the X-Ray Background |
| title_short | Constraining the AGN Luminosity Function from JWST with the X-Ray Background |
| title_sort | constraining the agn luminosity function from jwst with the x ray background |
| topic | Cosmology Quasars Diffuse x-ray background |
| url | https://doi.org/10.3847/2041-8213/ad09ac |
| work_keys_str_mv | AT hamsapadmanabhan constrainingtheagnluminosityfunctionfromjwstwiththexraybackground AT abrahamloeb constrainingtheagnluminosityfunctionfromjwstwiththexraybackground |