|
| | | | |
| | | |
| Stat |
Members: 3644
Articles: 2'499'343
Articles rated: 2609
16 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
The MOSDEF Survey: Neon as a Probe of ISM Physical Conditions at High Redshift | | Moon-Seong Jeong
; Alice E. Shapley
; Ryan L. Sanders
; Jordan N. Runco
; Michael W. Topping
; Naveen A. Reddy
; Mariska Kriek
; Alison L. Coil
; Bahram Mobasher
; Brian Siana
; Irene Shivaei
; William R. Freeman
; Mojegan Azadi
; Sedona H. Price
; Gene C. K. Leung
; Tara Fetherolf
; Laura de Groot
; Tom Zick
; Francesca M. Fornasini
; Guillermo Barro
; | | Date: |
20 Aug 2020 | | Abstract: | We present results on the properties of ionized neon emission in $zsim2$
star-forming galaxies drawn from the complete MOSFIRE Deep Evolution Field
(MOSDEF) survey. Doubly-ionized neon ([NeIII]$lambda3869$) is detected at
$geq3sigma$ in 61 galaxies, representing $sim25$% of the sample of MOSDEF
galaxies with H$alpha$, H$eta$, and [OIII]$lambda5007$ detections at
similar redshifts. We consider the neon emission-line properties of both
individual galaxies with [NeIII]$lambda3869$ detections and composite $zsim2$
spectra binned by stellar mass. With no requirement of [NeIII]$lambda3869$
detection for inclusion in the composite spectra, the latter provide a more
representative picture of neon emission-line properties in the MOSDEF sample.
We find that the [NeIII]$lambda3869$/[OII]$lambda3727$ ratio (Ne3O2) is
anti-correlated with stellar mass, as expected based on the mass-metallicity
relation. We also find that Ne3O2 is positively correlated with the
[OIII]$lambda5007$/[OII]$lambda3727$ ratio (O32) in $zsim2$ galaxies, but
that $zsim2$ line ratios are offset towards higher Ne3O2 at fixed O32,
compared with both local star-forming galaxies and individual HII regions.
Analyzing additional rest-optical line ratios including
[NeIII]$lambda3869$/[OIII]$lambda5007$ (Ne3O3) and
[OIII]$lambda5007$/H$eta$ (O3H$eta$) and comparing with both local HII
regions and predictions from photoionization models, we conclude that the
nebular emission-line ratios of $zsim2$ star-forming galaxies suggest a harder
ionizing spectrum (lower stellar metallicity, i.e., Fe/H) at fixed gas-phase
oxygen abundance, compared to systems at $zsim0$. These new results based on
neon lend support to the physical picture painted by oxygen, nitrogen,
hydrogen, and sulfur emission, of an ionized ISM in high-redshift star-forming
galaxies irradiated by chemically young, $alpha$-enhanced massive stars. | | Source: | arXiv, 2008.08831 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser claudebot
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER