Abstract
Abstract
Spiral density waves generated by an embedded planet are understood to cause “kinks” in observed velocity channel maps of CO surface emission by perturbing the gas motion within the spiral arms. If velocity kinks are a reliable probe of embedded planets, we should expect to see the planet-driven spiral arms in other observational tracers. We test this prediction by searching the dust continuum for the midplane counterparts of the spirals responsible for all of the velocity kink planet candidates reported to date whose orbits lie inside the dust continuum disk. We find no clear detection of any spiral structure in current continuum observations for six of the 10 velocity kink planet candidates in our sample (DoAr 25, GW Lup, Sz 129, HD 163296 #2, P94, and HD 143006), despite the high planet masses inferred from the kink amplitude. The remaining four cases include three clear detections of two-armed dust spirals (Elias 27, IM Lup, and WaOph 6) wherein neither spiral arm aligns with a wake originating from a reported planet location, suggesting that under the planetary-origin hypothesis, an accurate method for inferring the location of the planet in the midplane may need to encompass vertical effects. The 10th case, HD 97048, is inconclusive with current knowledge of the disk geometry.
Funder
Gouvernement du Canada ∣ Natural Sciences and Engineering Research Council of Canada
Alfred P. Sloan Foundation
Publisher
American Astronomical Society
Subject
Space and Planetary Science,Astronomy and Astrophysics
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献