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- W3035142404 endingPage "691" @default.
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- W3035142404 abstract "We present spectro-astrometric observations for 28 southern pre-main sequence (PMS) stars and investigate their circumstellar environment down to AU scales. The structures detected in the ``position spectra'' include: (1) almost all the known binary companions in our sample (Sz 68, Sz 41, HO Lup, VW Cha, S CrA, AS 205), (2) companion candidates which have not been detected by infrared speckle techniques (T CrA, MWC 300), (3) monopolar and bipolar jets (AS 353A, CS Cha), (4) a combination of jets and a bow shock (VV CrA), and (5) a combination of a jet and stellar companion (R CrA). Results in known binaries show that this technique is capable of detecting binaries with separations down to ~10 milliarcsec. Both components in each binary appear to have strikingly similar profiles in H-alpha emission, indicating a similarity of circumstellar activity (mass accretion and/or a wind), and supporting the scenario of core fragmentation for the mechanism of binary formation. The bipolar H-alpha jet in CS Cha has a spatial scale of ~1.5 AU, similar to that previously observed in RU Lup, and likely be heated by a mechanism other than shocks. From the spatial scale, velocity, and H-alpha luminosity, we estimate the mean hydrogen density in the AU-scale bipolar flows to be > 10^7 cm^-3. The bipolar geometry in these jets can be explained by the presence of a disc gap/hole at AU scales, which could be induced by a gas-giant planet at the ice condensation radius." @default.
- W3035142404 created "2020-06-19" @default.
- W3035142404 creator A5005146771 @default.
- W3035142404 creator A5067918234 @default.
- W3035142404 creator A5075013770 @default.
- W3035142404 date "2002-12-17" @default.
- W3035142404 modified "2023-09-24" @default.
- W3035142404 title "A spectro-astrometric study of southern pre-main sequence stars" @default.
- W3035142404 cites W1510244401 @default.
- W3035142404 cites W1893172755 @default.
- W3035142404 cites W1965984870 @default.
- W3035142404 cites W1966079298 @default.
- W3035142404 cites W1969559705 @default.
- W3035142404 cites W1970377458 @default.
- W3035142404 cites W1972802700 @default.
- W3035142404 cites W1974091745 @default.
- W3035142404 cites W1974689993 @default.
- W3035142404 cites W1980100166 @default.
- W3035142404 cites W1982276387 @default.
- W3035142404 cites W1983509013 @default.
- W3035142404 cites W1984218847 @default.
- W3035142404 cites W1984420652 @default.
- W3035142404 cites W1985213787 @default.
- W3035142404 cites W1985967817 @default.
- W3035142404 cites W1988434451 @default.
- W3035142404 cites W1990804339 @default.
- W3035142404 cites W1995615208 @default.
- W3035142404 cites W1999117640 @default.
- W3035142404 cites W2000417483 @default.
- W3035142404 cites W2004651075 @default.
- W3035142404 cites W2009029252 @default.
- W3035142404 cites W2009132417 @default.
- W3035142404 cites W2009819793 @default.
- W3035142404 cites W2011924956 @default.
- W3035142404 cites W2016301569 @default.
- W3035142404 cites W2017575225 @default.
- W3035142404 cites W2019918459 @default.
- W3035142404 cites W2023760321 @default.
- W3035142404 cites W2024876142 @default.
- W3035142404 cites W2024977654 @default.
- W3035142404 cites W2025788510 @default.
- W3035142404 cites W2027542103 @default.
- W3035142404 cites W2034247551 @default.
- W3035142404 cites W2035402285 @default.
- W3035142404 cites W2035435081 @default.
- W3035142404 cites W2036156692 @default.
- W3035142404 cites W2038094450 @default.
- W3035142404 cites W2040139045 @default.
- W3035142404 cites W2042753720 @default.
- W3035142404 cites W2043647763 @default.
- W3035142404 cites W2044298893 @default.
- W3035142404 cites W2050723222 @default.
- W3035142404 cites W2051598133 @default.
- W3035142404 cites W2056984828 @default.
- W3035142404 cites W2059079048 @default.
- W3035142404 cites W2060278163 @default.
- W3035142404 cites W2063353999 @default.
- W3035142404 cites W2067968683 @default.
- W3035142404 cites W2068582107 @default.
- W3035142404 cites W2070606946 @default.
- W3035142404 cites W2071733898 @default.
- W3035142404 cites W2071966587 @default.
- W3035142404 cites W2072746620 @default.
- W3035142404 cites W2072952690 @default.
- W3035142404 cites W2073327339 @default.
- W3035142404 cites W2074460145 @default.
- W3035142404 cites W2075076813 @default.
- W3035142404 cites W2075456175 @default.
- W3035142404 cites W2077729913 @default.
- W3035142404 cites W2078092500 @default.
- W3035142404 cites W2086180078 @default.
- W3035142404 cites W2091411196 @default.
- W3035142404 cites W2095189808 @default.
- W3035142404 cites W2099116887 @default.
- W3035142404 cites W2118781384 @default.
- W3035142404 cites W2126142867 @default.
- W3035142404 cites W2132400017 @default.
- W3035142404 cites W2140611633 @default.
- W3035142404 cites W2154370253 @default.
- W3035142404 cites W3098743229 @default.
- W3035142404 cites W3102548968 @default.
- W3035142404 cites W3103158930 @default.
- W3035142404 cites W3171376889 @default.
- W3035142404 cites W33963584 @default.
- W3035142404 cites W4244818491 @default.
- W3035142404 doi "https://doi.org/10.1051/0004-6361:20021544" @default.
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