Matches in SemOpenAlex for { <https://semopenalex.org/work/W3102164824> ?p ?o ?g. }
- W3102164824 endingPage "56" @default.
- W3102164824 startingPage "56" @default.
- W3102164824 abstract "RW Aur is a binary system composed of two young, low-mass stars. The primary, RW Aur A, has undergone visual dimming events (ΔV = 2–3 mag) in 2011, 2014–16, and 2017–2018. Visual and IR observations indicate a gray absorber that moved into the line of sight. This dimming is also associated with changes in the outflow. In 2017, when the optical brightness was almost 2 mag below the long-term average, we triggered a Chandra observation to measure the absorbing column density NH and to constrain dust properties and the gas-to-dust ratio of the absorber. In 2017, the X-ray spectrum is more absorbed than it was in the optically bright state () and shows significantly more hot plasma than in X-ray observations taken before. Furthermore, a new emission feature at 6.63 ± 0.02 keV (statistic) ±0.02 keV (systematic) appeared, indicating an Fe abundance an order of magnitude above solar, in contrast with previous sub-solar Fe abundance measurements. Comparing X-ray absorbing column density NH and optical extinction AV, we find that either the gas-to-dust ratio in the absorber is orders of magnitude higher than in the ISM, or the absorber has undergone significant dust evolution. Given the high column density coupled with changes in the X-ray spectral shape, this absorber is probably located in the inner disk. We speculate that a breakup of planetesimals or a terrestrial planet could supply large grains, causing gray absorption; some of these grains would be accreted and enrich the stellar corona with iron, which could explain the inferred high abundance." @default.
- W3102164824 created "2020-11-23" @default.
- W3102164824 creator A5016174491 @default.
- W3102164824 creator A5016831599 @default.
- W3102164824 creator A5017202785 @default.
- W3102164824 creator A5021092400 @default.
- W3102164824 creator A5030249319 @default.
- W3102164824 creator A5046850653 @default.
- W3102164824 creator A5057895656 @default.
- W3102164824 creator A5058866310 @default.
- W3102164824 creator A5075878299 @default.
- W3102164824 creator A5089519043 @default.
- W3102164824 date "2018-07-18" @default.
- W3102164824 modified "2023-10-15" @default.
- W3102164824 title "Optical Dimming of RW Aur Associated with an Iron-rich Corona and Exceptionally High Absorbing Column Density" @default.
- W3102164824 cites W1484030292 @default.
- W3102164824 cites W1897509534 @default.
- W3102164824 cites W1960690313 @default.
- W3102164824 cites W1965998565 @default.
- W3102164824 cites W1981030602 @default.
- W3102164824 cites W1987319691 @default.
- W3102164824 cites W1988559221 @default.
- W3102164824 cites W1990388558 @default.
- W3102164824 cites W1993745580 @default.
- W3102164824 cites W2000657683 @default.
- W3102164824 cites W2005965717 @default.
- W3102164824 cites W2014849583 @default.
- W3102164824 cites W2027075281 @default.
- W3102164824 cites W2027190300 @default.
- W3102164824 cites W2032117566 @default.
- W3102164824 cites W2033062455 @default.
- W3102164824 cites W2041685615 @default.
- W3102164824 cites W2049861983 @default.
- W3102164824 cites W2057906648 @default.
- W3102164824 cites W2059079048 @default.
- W3102164824 cites W2065925884 @default.
- W3102164824 cites W2068433364 @default.
- W3102164824 cites W2075140538 @default.
- W3102164824 cites W2080426384 @default.
- W3102164824 cites W2080642236 @default.
- W3102164824 cites W2083419900 @default.
- W3102164824 cites W2092579943 @default.
- W3102164824 cites W2099100164 @default.
- W3102164824 cites W2105930823 @default.
- W3102164824 cites W2107827469 @default.
- W3102164824 cites W2109697614 @default.
- W3102164824 cites W2121627678 @default.
- W3102164824 cites W2125018671 @default.
- W3102164824 cites W2128738047 @default.
- W3102164824 cites W2132400017 @default.
- W3102164824 cites W2133725650 @default.
- W3102164824 cites W2135625048 @default.
- W3102164824 cites W2136672737 @default.
- W3102164824 cites W2138534553 @default.
- W3102164824 cites W2143051755 @default.
- W3102164824 cites W2143291760 @default.
- W3102164824 cites W2152971367 @default.
- W3102164824 cites W2153970052 @default.
- W3102164824 cites W2162597402 @default.
- W3102164824 cites W2167727979 @default.
- W3102164824 cites W2281864350 @default.
- W3102164824 cites W2314445977 @default.
- W3102164824 cites W2322479090 @default.
- W3102164824 cites W2337957959 @default.
- W3102164824 cites W2519255056 @default.
- W3102164824 cites W2537098252 @default.
- W3102164824 cites W2593048117 @default.
- W3102164824 cites W2605057281 @default.
- W3102164824 cites W2899497983 @default.
- W3102164824 cites W3098700516 @default.
- W3102164824 cites W3099283195 @default.
- W3102164824 cites W3099462118 @default.
- W3102164824 cites W3099490864 @default.
- W3102164824 cites W3099534049 @default.
- W3102164824 cites W3099879872 @default.
- W3102164824 cites W3100319995 @default.
- W3102164824 cites W3100346828 @default.
- W3102164824 cites W3101689680 @default.
- W3102164824 cites W3102537522 @default.
- W3102164824 cites W3102962879 @default.
- W3102164824 cites W3103437495 @default.
- W3102164824 cites W3103681827 @default.
- W3102164824 cites W3105084781 @default.
- W3102164824 cites W3105371700 @default.
- W3102164824 cites W3105549623 @default.
- W3102164824 cites W3106200593 @default.
- W3102164824 cites W4291007622 @default.
- W3102164824 cites W4292405205 @default.
- W3102164824 cites W4293184771 @default.
- W3102164824 cites W4293683981 @default.
- W3102164824 cites W3105377147 @default.
- W3102164824 doi "https://doi.org/10.3847/1538-3881/aac9bd" @default.
- W3102164824 hasPublicationYear "2018" @default.
- W3102164824 type Work @default.
- W3102164824 sameAs 3102164824 @default.
- W3102164824 citedByCount "11" @default.
- W3102164824 countsByYear W31021648242018 @default.
- W3102164824 countsByYear W31021648242019 @default.