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- W2933767048 endingPage "4611" @default.
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- W2933767048 abstract "We have determined the rate of large accretion events in class I and II young stellar objects (YSOs) by comparing the all-sky digitised photographic plate surveys provided by SuperCOSMOS with the latest data release from Gaia (DR2). The long mean baseline of 55 years along with a large sample of class II YSOs ($simeq$15,000) allows us to study approximately 1 million YSO-years. We find 139 objects with $Delta Rgeq1$~mag, most of which are found at amplitudes between 1 and 3 mag. The majority of YSOs in this group show irregular variability or long-lasting fading events, which is best explained as hot spots due to accretion or by variable extinction. There is a tail of YSOs at $Delta Rgeq3$~mag and they seem to represent a different population. Surprisingly many objects in this group show high-amplitude irregular variability over timescales shorter than 10 years, in contrast with the view that high-amplitude objects always have long outbursts. However, we find 6 objects that are consistent with undergoing large, long lasting accretion events, 3 of them previously unknown. This yields an outburst recurrence timescale of 112 kyr, with a 68% confidence interval [74 to 180] kyr. This represents the first robust determination of the outburst rate in class II YSOs and shows that YSOs in their planet-forming stage do in fact undergo large accretion events, and with timescales of $simeq$100,000 years. In addition, we find that outbursts in the class II stage are $simeq$10 times less frequent than during the class I stage." @default.
- W2933767048 created "2019-04-11" @default.
- W2933767048 creator A5041550413 @default.
- W2933767048 creator A5049998079 @default.
- W2933767048 creator A5077924645 @default.
- W2933767048 date "2019-04-18" @default.
- W2933767048 modified "2023-09-30" @default.
- W2933767048 title "Determining the recurrence time-scale of long-lasting YSO outbursts" @default.
- W2933767048 cites W1515149315 @default.
- W2933767048 cites W1533086849 @default.
- W2933767048 cites W1554228439 @default.
- W2933767048 cites W1657791533 @default.
- W2933767048 cites W1674559901 @default.
- W2933767048 cites W1678977860 @default.
- W2933767048 cites W1928224219 @default.
- W2933767048 cites W1943306457 @default.
- W2933767048 cites W1963655933 @default.
- W2933767048 cites W1965620179 @default.
- W2933767048 cites W1968995569 @default.
- W2933767048 cites W1969821340 @default.
- W2933767048 cites W1971523144 @default.
- W2933767048 cites W1974448971 @default.
- W2933767048 cites W1976071602 @default.
- W2933767048 cites W1978126807 @default.
- W2933767048 cites W1979842947 @default.
- W2933767048 cites W1981120670 @default.
- W2933767048 cites W1981808693 @default.
- W2933767048 cites W1983264191 @default.
- W2933767048 cites W1983332987 @default.
- W2933767048 cites W1983968691 @default.
- W2933767048 cites W1983993499 @default.
- W2933767048 cites W1984165747 @default.
- W2933767048 cites W1989439485 @default.
- W2933767048 cites W1996380539 @default.
- W2933767048 cites W1997122761 @default.
- W2933767048 cites W1997479233 @default.
- W2933767048 cites W1997731820 @default.
- W2933767048 cites W2003151887 @default.
- W2933767048 cites W2006918401 @default.
- W2933767048 cites W2009385893 @default.
- W2933767048 cites W2011759989 @default.
- W2933767048 cites W2013746315 @default.
- W2933767048 cites W2013859371 @default.
- W2933767048 cites W2016004965 @default.
- W2933767048 cites W2019458326 @default.
- W2933767048 cites W2020282587 @default.
- W2933767048 cites W2022429968 @default.
- W2933767048 cites W2026036168 @default.
- W2933767048 cites W2027277598 @default.
- W2933767048 cites W2028037200 @default.
- W2933767048 cites W2028616359 @default.
- W2933767048 cites W2032255556 @default.
- W2933767048 cites W2038760862 @default.
- W2933767048 cites W2042023946 @default.
- W2933767048 cites W2044544211 @default.
- W2933767048 cites W2044669640 @default.
- W2933767048 cites W2048658345 @default.
- W2933767048 cites W2049045553 @default.
- W2933767048 cites W2052937506 @default.
- W2933767048 cites W2053605976 @default.
- W2933767048 cites W2054768509 @default.
- W2933767048 cites W2060509649 @default.
- W2933767048 cites W2066772989 @default.
- W2933767048 cites W2067056886 @default.
- W2933767048 cites W2067557525 @default.
- W2933767048 cites W2073715627 @default.
- W2933767048 cites W2074901466 @default.
- W2933767048 cites W2076932174 @default.
- W2933767048 cites W2079333065 @default.
- W2933767048 cites W2082580853 @default.
- W2933767048 cites W2082619949 @default.
- W2933767048 cites W2083217178 @default.
- W2933767048 cites W2089880545 @default.
- W2933767048 cites W2090902729 @default.
- W2933767048 cites W2091044401 @default.
- W2933767048 cites W2091094726 @default.
- W2933767048 cites W2091604763 @default.
- W2933767048 cites W2109697614 @default.
- W2933767048 cites W2114945401 @default.
- W2933767048 cites W2117885077 @default.
- W2933767048 cites W2124588358 @default.
- W2933767048 cites W2124675836 @default.
- W2933767048 cites W2126700402 @default.
- W2933767048 cites W2139699719 @default.
- W2933767048 cites W2140083426 @default.
- W2933767048 cites W2142220522 @default.
- W2933767048 cites W2148804397 @default.
- W2933767048 cites W2150756303 @default.
- W2933767048 cites W2151224705 @default.
- W2933767048 cites W2164611112 @default.
- W2933767048 cites W2194811967 @default.
- W2933767048 cites W2274731095 @default.
- W2933767048 cites W2276128456 @default.
- W2933767048 cites W2276541034 @default.
- W2933767048 cites W2471902705 @default.
- W2933767048 cites W2479945864 @default.
- W2933767048 cites W2519255056 @default.
- W2933767048 cites W2532045532 @default.