تقرير
The ALPINE-ALMA [CII] Survey: Investigation of 10 Galaxies at $z\sim4.5$ with [OII] and [CII] Line Emission $-$ ISM Properties and [OII]$-$SFR Relation
| العنوان: | The ALPINE-ALMA [CII] Survey: Investigation of 10 Galaxies at $z\sim4.5$ with [OII] and [CII] Line Emission $-$ ISM Properties and [OII]$-$SFR Relation |
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| المؤلفون: | Vanderhoof, Brittany N., Faisst, A. L., Shen, L., Lemaux, B. C., Béthermin, M., Capak, P. L., Cassata, P., Fèvre, O. Le, Schaerer, D., Silverman, J., Yan, L., Boquien, M., Gal, R., Kartaltepe, J., Lubin, L. M., Dessauges-Zavadsky, M., Fudamoto, Y., Ginolfi, M., Hathi, N. P., Jones, G. C., Koekemoer, A. M., Narayanan, D., Romano, M., Talia, M., Vergani, D., Zamorani, G. |
| سنة النشر: | 2022 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies |
| الوصف: | We present $10$ main-sequence ALPINE galaxies (log($M/M_{\odot}$) = 9.2-11.1 and ${\rm SFR}=23-190\,{\rm M_{\odot}\,yr^{-1}}$) at $z\sim4.5$ with optical [OII] measurements from Keck/MOSFIRE spectroscopy and Subaru/MOIRCS narrow-band imaging. This is the largest such multi-wavelength sample at these redshifts, combining various measurements in the ultra-violet, optical, and far-infrared including [CII]$_{158{\rm \mu m}}$ line emission and dust continuum from ALMA and H$\alpha$ emission from Spitzer photometry. For the first time, this unique sample allows us to analyze the relation between [OII] and total star-formation rate (SFR) and the interstellar medium (ISM) properties via [OII]/[CII] and [OII]/\halpha luminosity ratios at $z\sim4.5$. The [OII]$-$SFR relation at $z\sim4.5$ cannot be described using standard local descriptions, but is consistent with a metal-dependent relation assuming metallicities around $50\%$ solar. To explain the measured dust-corrected luminosity ratios of $L[OII]/L[CII] \sim 0.98^{+0.21}_{-0.22}$ and $L[OII]/LHa \sim -0.22^{+0.13}_{-0.15}$ for our sample, ionization parameters $\log(U)< -2$ and electron densities $\log(\rm n_e / {\rm [cm^{-3}]}) \sim 2.5-3$ are required. The former is consistent with galaxies at $z\sim2-3$, however lower than at $z>6$. The latter may be slightly higher than expected given the galaxies' specific SFR. The analysis of this pilot sample suggests that typical log($ M/M_{\odot})$ > 9 galaxies at $z\sim4.5$ to have broadly similar ISM properties as their descendants at $z\sim2$ and suggest a strong evolution of ISM properties since the Epoch of Reionization at $z>6$. Comment: 14 pages, 8 figures, Accepted for publication to MNRAS |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1093/mnras/stac071 |
| URL الوصول: | http://arxiv.org/abs/2201.03587 |
| رقم الأكسشن: | edsarx.2201.03587 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1093/mnras/stac071 |
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