English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We report on a sensitive search for redshifted H$\alpha$ line-emission fromthree high-metallicity damped Ly$\alpha$ absorbers (DLAs) at $z \approx 2.4$with the Near-infrared Integral Field Spectrometer (NIFS) on the Gemini-Northtelescope, assisted by the ALTtitude conjugate Adaptive optics for the InfraRed(ALTAIR) system with a laser guide star. Within the NIFS field-of-view,$\approx 3.22" \times 2.92"$ corresponding to $\approx 25$ kpc $ \times 23$ kpcat $z=2.4$, we detect no statistically significant line-emission at theexpected redshifted H$\alpha$ wavelengths. The measured root-mean-square noisefluctuations in $0.4"$ apertures are $1-3\times10^{-18}$ erg s$^{-1}$cm$^{-2}$. Our analysis of simulated, compact, line-emitting sources yieldsstringent limits on the star-formation rates (SFRs) of the three DLAs, $<2.2$~M$_{\odot}$ yr$^{-1}$ ($3\sigma$) for two absorbers, and $<11$~M$_{\odot}$ yr$^{-1}$ ($3\sigma$) for the third, at all impact parameterswithin $\approx 12.5$~kpc to the quasar sightline at the DLA redshift. For thethird absorber, the SFR limit is $< 4.4$~M$_\odot$ yr$^{-1}$ for locations awayfrom the quasar sightline. These results demonstrate the potential of adaptiveoptics-assisted, integral field unit searches for galaxies associated withhigh-$z$ DLAs.

A search for H$\alpha$ emission in high-metallicity damped Lyman-$\alpha$ systems at $z \sim 2.4$