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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We use two-band imaging data from the Advanced Camera for Surveys on boardthe Hubble Space Telescope for a detailed study of NGC1533, an SB0 galaxy inthe Dorado group surrounded by a ring of HI. NGC1533 appears to be completing atransition from late to early type: it is red, but not quite dead. Faint spiralstructure becomes visible following galaxy subtraction, and luminous blue starscan be seen in isolated areas of the disk. Dust is visible in the color map inthe region around the bar, and there is a linear color gradient throughout thedisk. We determine an accurate distance from the surface brightnessfluctuations (SBF) method, finding m-M = 31.44\pm0.12 mag, or d = 19.4\pm1.1Mpc. We then study the globular cluster (GC) colors, sizes, and luminosityfunction (GCLF). Estimates of the distance from the median of the GC half-lightradii and from the peak of the GCLF both agree well with the SBF distance. TheGC specific frequency is S_N=1.3\pm0.2, typical for an early-type disk galaxy.The color distribution is bimodal, as commonly observed for bright galaxies.There is a suggestion of the redder GCs having smaller sizes, but the trend isnot significant. The sizes do increase significantly with galactocentricradius, in a manner more similar to the Milky Way GC system than to those inVirgo. This difference may be an effect of the steeper density gradients inloose groups as compared to galaxy clusters. Additional studies of early-typegalaxies in low density regions can help determine if this is indeed a generalenvironmental trend.

A Galaxy in Transition: Structure, Globular Clusters, and Distance of the Star-Forming S0 Galaxy NGC 1533 in Dorado