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

Recent VLT/SPHERE near-infrared imaging observations revealed two spiral armswith a near m=2 rotational symmetry in the protoplanetary disk around the ~1.7solar mass Herbig star HD 100453. A ~0.3 solar mass M dwarf companion, HD100453 B, was also identified at a projected separation of 120 AU from theprimary. In this Letter, we carry out hydrodynamic and radiative transfersimulations to examine the scattered light morphology of the HD 100453 disk asperturbed by the companion on a circular and coplanar orbit. We find that thecompanion truncates the disk at ~45 AU in scattered light images, and excitestwo spiral arms in the remaining (circumprimary) disk with a near m=2rotational symmetry. Both the truncated disk size and the morphology of thespirals are in excellent agreement with the SPHERE observations at Y , J, H,and K1-bands, suggesting that the M dwarf companion is indeed responsible forthe observed double-spiral-arm pattern. Our model suggests that the disk isclose to face on (inclination angle ~5 degree), and that the entiredisk-companion system rotates counterclockwise on the sky. The HD 100453observations, along with our modeling work, demonstrate that double spiral armpatterns in near-infrared scattered light images can be generically produced bycompanions, and support future observations to identify the companionsresponsible for the arms observed in the MWC 758 and SAO 206462 systems.

An M Dwarf Companion and Its Induced Spiral Arms in the HD 100453 Protoplanetary Disk