[Ne v] emission from a faint epoch of reionization-era galaxy: evidence for a narrow-line intermediate mass black hole
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , , , , , , , , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2024
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866910348281380864 |
|---|---|
| author | Chisholm, J. Berg, D. A. Endsley, R. Gazagnes, S. Richardson, C. T. Lambrides, E. Greene, J. Finkelstein, S. Flury, S. Guseva, N. G. Henry, A. Hutchison, T. A. Izotov, Y. I. Marques-Chaves, R. Oesch, P. Papovich, C. Saldana-Lopez, A. Schaerer, D. Stephenson, M. G. |
| author_facet | Chisholm, J. Berg, D. A. Endsley, R. Gazagnes, S. Richardson, C. T. Lambrides, E. Greene, J. Finkelstein, S. Flury, S. Guseva, N. G. Henry, A. Hutchison, T. A. Izotov, Y. I. Marques-Chaves, R. Oesch, P. Papovich, C. Saldana-Lopez, A. Schaerer, D. Stephenson, M. G. |
| contents | Here we present high spectral resolution $\textit{JWST}$ NIRSpec observations of GN42437, a low-mass (log(M$_\ast/M_\odot)=7.9$), compact ($r_e < 500$pc), extreme starburst galaxy at $z=5.59$ with 13 emission line detections. GN42437 has a low-metallicity (5-10% Z$_\odot$) and its rest-frame H$α$ equivalent width suggests nearly all of the observed stellar mass formed within the last 3 Myr. GN42437 has an extraordinary 7$σ$ significant [Ne V] 3427 $\mathring{\rm A}$ detection. The [Ne V] line has a rest-frame equivalent width of $11\pm2\mathring{\rm A}$, [Ne V]/H$α=0.04\pm0.007$, [Ne V]/[Ne III] 3870$\mathring{\rm A} = 0.26\pm0.04$, and [Ne V]/He II 4687 $\mathring{\rm A} = 1.2\pm0.5$. Ionization from massive stars, shocks, or high-mass X-ray binaries cannot simultaneously produce these [Ne V] and low-ionization line ratios. Reproducing the complete nebular structure requires both massive stars and accretion onto a black hole. We do not detect broad lines nor do the traditional diagnostics indicate that GN42437 has an accreting black hole. Thus, the very-high-ionization emission lines powerfully diagnose faint narrow-line black holes at high-redshift. We approximate the black hole mass in a variety of ways as log(M$_{\rm BH}/M_\odot) \sim 5-7$. This black hole mass is consistent with local relations between the black hole mass and the observed velocity dispersion, but significantly more massive than the stellar mass would predict. Very-high-ionization emission lines may reveal samples to probe the formation and growth of the first black holes in the universe. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_18643 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | [Ne v] emission from a faint epoch of reionization-era galaxy: evidence for a narrow-line intermediate mass black hole Chisholm, J. Berg, D. A. Endsley, R. Gazagnes, S. Richardson, C. T. Lambrides, E. Greene, J. Finkelstein, S. Flury, S. Guseva, N. G. Henry, A. Hutchison, T. A. Izotov, Y. I. Marques-Chaves, R. Oesch, P. Papovich, C. Saldana-Lopez, A. Schaerer, D. Stephenson, M. G. Astrophysics of Galaxies Here we present high spectral resolution $\textit{JWST}$ NIRSpec observations of GN42437, a low-mass (log(M$_\ast/M_\odot)=7.9$), compact ($r_e < 500$pc), extreme starburst galaxy at $z=5.59$ with 13 emission line detections. GN42437 has a low-metallicity (5-10% Z$_\odot$) and its rest-frame H$α$ equivalent width suggests nearly all of the observed stellar mass formed within the last 3 Myr. GN42437 has an extraordinary 7$σ$ significant [Ne V] 3427 $\mathring{\rm A}$ detection. The [Ne V] line has a rest-frame equivalent width of $11\pm2\mathring{\rm A}$, [Ne V]/H$α=0.04\pm0.007$, [Ne V]/[Ne III] 3870$\mathring{\rm A} = 0.26\pm0.04$, and [Ne V]/He II 4687 $\mathring{\rm A} = 1.2\pm0.5$. Ionization from massive stars, shocks, or high-mass X-ray binaries cannot simultaneously produce these [Ne V] and low-ionization line ratios. Reproducing the complete nebular structure requires both massive stars and accretion onto a black hole. We do not detect broad lines nor do the traditional diagnostics indicate that GN42437 has an accreting black hole. Thus, the very-high-ionization emission lines powerfully diagnose faint narrow-line black holes at high-redshift. We approximate the black hole mass in a variety of ways as log(M$_{\rm BH}/M_\odot) \sim 5-7$. This black hole mass is consistent with local relations between the black hole mass and the observed velocity dispersion, but significantly more massive than the stellar mass would predict. Very-high-ionization emission lines may reveal samples to probe the formation and growth of the first black holes in the universe. |
| title | [Ne v] emission from a faint epoch of reionization-era galaxy: evidence for a narrow-line intermediate mass black hole |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2402.18643 |