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 present GPI polarized intensity imagery of HD 100453 in Y-, J-, and K1bands which reveals an inner gap ($9 - 18$ au), an outer disk ($18-39$ au) withtwo prominent spiral arms, and two azimuthally-localized dark features alsopresent in SPHERE total intensity images (Wagner 2015). SED fitting furthersuggests the radial gap extends to $1$ au. The narrow, wedge-like shape of thedark features appears similar to predictions of shadows cast by a inner diskwhich is misaligned with respect to the outer disk. Using the Monte Carloradiative transfer code HOCHUNCK3D (Whitney 2013), we construct a model of thedisk which allows us to determine its physical properties in more detail. Fromthe angular separation of the features we measure the difference in inclinationbetween the disks 45$^{\circ}$, and their major axes, PA = 140$^{\circ}$ eastof north for the outer disk and 100$^{\circ}$for the inner disk. We find anouter disk inclination of $25 \pm 10^{\circ}$ from face-on in broad agreementwith the Wagner 2015 measurement of 34$^{\circ}$. SPHERE data in J- and H-bandsindicate a reddish disk which points to HD 100453 evolving into a young debrisdisk.

The shadow knows: using shadows to investigate the structure of the pretransitional disk of HD 100453