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 Plus annual

Presents the access of premium content as premium feature

Premium Content

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 annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The rotational kinematic Sunyaev-Zeldovich (rkSZ) signal, imprinted on thecosmic microwave background (CMB) by the gaseous halos (spinning "atmospheres")of foreground galaxies, would be a novel probe of galaxy formation. Althoughthe signal is too weak to detect in individual galaxies, we analyze thefeasibility of its statistical detection via stacking CMB data on many galaxiesfor which the spin orientation can be estimated spectroscopically. We use an"optimistic" model, in which fully ionized atmospheres contain the cosmicbaryon fraction and spin at the halo's circular velocity $v_{\rm circ}$, and amore realistic model, based on hydrodynamical simulations, with multi-phaseatmospheres spinning at a fraction of $v_{\rm circ}$. We incorporate realisticnoise estimates into our analysis.  Using low-redshift galaxy properties from the MaNGA spectroscopic survey(with median halo mass of $6.6\times10^{11}\,M_{\odot}$), and CMB data qualityfrom Planck, we find that a $3\sigma$ detection would require a few$\times10^4$ galaxies, even in the optimistic model. This is too high for currentsurveys, but upcoming higher-angular resolution CMB experiments willsignificantly reduce the requirements: stacking CMB data on galaxy spins in a$\sim10$ deg$^2$ can rule out the optimistic models, and $\approx$350 deg$^2$will suffice for a $3\sigma$ detection with ACT.  As a proof-of-concept, we stacked Planck data on the position of$\approx2,000$ MaNGA galaxies, aligned with the galaxies' projected spin, andscaled to their halos' angular size. We rule out average temperature dipoleslarger than $\approx1.9\,\mu$K around field spiral galaxies.

Probing gaseous galactic halos through the rotational kSZ effect