Matches in SemOpenAlex for { <https://semopenalex.org/work/W3125244173> ?p ?o ?g. }
- W3125244173 endingPage "226" @default.
- W3125244173 startingPage "226" @default.
- W3125244173 abstract "The $sim500$, Myr A2IV star HR 1645 has one of the most significant low-amplitude accelerations of nearby early-type stars measured from a comparison of the {it Hipparcos} and {it Gaia} astrometric catalogues. This signal is consistent with either a stellar companion with a moderate mass ratio ($qsim0.5$) on a short period ($P<1$,yr), or a substellar companion at a separation wide enough to be resolved with ground-based high contrast imaging instruments; long-period equal mass ratio stellar companions that are also consistent with the measured acceleration are excluded with previous imaging observations. The small but significant amplitude of the acceleration made HR 1645 a promising candidate for targeted searches for brown dwarf and planetary-mass companions around nearby, young stars. In this paper we explore the origin of the astrometric acceleration by modelling the signal induced by a wide-orbit M8 companion discovered with the Gemini Planet Imager, as well as the effects of an inner short-period spectroscopic companion discovered a century ago but not since followed-up. We present the first constraints on the orbit of the inner companion, and demonstrate that it is a plausible cause of the astrometric acceleration. This result demonstrates the importance of vetting of targets with measured astrometric acceleration for short-period stellar companions prior to conducting targeted direct imaging surveys for wide-orbit substellar companions." @default.
- W3125244173 created "2021-02-01" @default.
- W3125244173 creator A5001691604 @default.
- W3125244173 creator A5002415904 @default.
- W3125244173 creator A5002887188 @default.
- W3125244173 creator A5006033404 @default.
- W3125244173 creator A5006065369 @default.
- W3125244173 creator A5008100631 @default.
- W3125244173 creator A5012168505 @default.
- W3125244173 creator A5012383363 @default.
- W3125244173 creator A5012982229 @default.
- W3125244173 creator A5013056663 @default.
- W3125244173 creator A5016056539 @default.
- W3125244173 creator A5020146514 @default.
- W3125244173 creator A5031098458 @default.
- W3125244173 creator A5034512756 @default.
- W3125244173 creator A5036337444 @default.
- W3125244173 creator A5036800487 @default.
- W3125244173 creator A5038383519 @default.
- W3125244173 creator A5038400487 @default.
- W3125244173 creator A5040799807 @default.
- W3125244173 creator A5042133979 @default.
- W3125244173 creator A5044281656 @default.
- W3125244173 creator A5045098143 @default.
- W3125244173 creator A5046420999 @default.
- W3125244173 creator A5047354924 @default.
- W3125244173 creator A5049156516 @default.
- W3125244173 creator A5049787382 @default.
- W3125244173 creator A5051824379 @default.
- W3125244173 creator A5051967829 @default.
- W3125244173 creator A5051977434 @default.
- W3125244173 creator A5052861705 @default.
- W3125244173 creator A5059263007 @default.
- W3125244173 creator A5059447145 @default.
- W3125244173 creator A5060148993 @default.
- W3125244173 creator A5060419827 @default.
- W3125244173 creator A5061967484 @default.
- W3125244173 creator A5062819300 @default.
- W3125244173 creator A5064732027 @default.
- W3125244173 creator A5065968034 @default.
- W3125244173 creator A5071345462 @default.
- W3125244173 creator A5072169121 @default.
- W3125244173 creator A5072734247 @default.
- W3125244173 creator A5073686275 @default.
- W3125244173 creator A5074357302 @default.
- W3125244173 creator A5074920541 @default.
- W3125244173 creator A5075668364 @default.
- W3125244173 creator A5076131341 @default.
- W3125244173 creator A5076157892 @default.
- W3125244173 creator A5076670340 @default.
- W3125244173 creator A5079440367 @default.
- W3125244173 creator A5083615726 @default.
- W3125244173 creator A5086829334 @default.
- W3125244173 creator A5088079206 @default.
- W3125244173 creator A5088546230 @default.
- W3125244173 creator A5091640710 @default.
- W3125244173 date "2019-11-13" @default.
- W3125244173 modified "2023-10-17" @default.
- W3125244173 title "Detection of a Low-mass Stellar Companion to the Accelerating A2IV Star HR 1645" @default.
- W3125244173 cites W1495614800 @default.
- W3125244173 cites W1507730367 @default.
- W3125244173 cites W1670318221 @default.
- W3125244173 cites W1909652296 @default.
- W3125244173 cites W1979127929 @default.
- W3125244173 cites W1991521716 @default.
- W3125244173 cites W1997308629 @default.
- W3125244173 cites W2001265656 @default.
- W3125244173 cites W2004008632 @default.
- W3125244173 cites W2011301426 @default.
- W3125244173 cites W2036552611 @default.
- W3125244173 cites W2054060375 @default.
- W3125244173 cites W2061914283 @default.
- W3125244173 cites W2068309608 @default.
- W3125244173 cites W2087569457 @default.
- W3125244173 cites W2090795322 @default.
- W3125244173 cites W2092525481 @default.
- W3125244173 cites W2100833883 @default.
- W3125244173 cites W2113481865 @default.
- W3125244173 cites W2133636837 @default.
- W3125244173 cites W2133725650 @default.
- W3125244173 cites W2135625048 @default.
- W3125244173 cites W2171074980 @default.
- W3125244173 cites W2261573924 @default.
- W3125244173 cites W2598539591 @default.
- W3125244173 cites W2780671576 @default.
- W3125244173 cites W2798336535 @default.
- W3125244173 cites W2901299296 @default.
- W3125244173 cites W2901807116 @default.
- W3125244173 cites W2939399083 @default.
- W3125244173 cites W3095278255 @default.
- W3125244173 cites W3097976388 @default.
- W3125244173 cites W3099011863 @default.
- W3125244173 cites W3099571084 @default.
- W3125244173 cites W3099704404 @default.
- W3125244173 cites W3100053262 @default.
- W3125244173 cites W3101002860 @default.
- W3125244173 cites W3101086176 @default.
- W3125244173 cites W3101681642 @default.