Matches in SemOpenAlex for { <https://semopenalex.org/work/W3205252004> ?p ?o ?g. }
- W3205252004 endingPage "762" @default.
- W3205252004 startingPage "748" @default.
- W3205252004 abstract "ABSTRACT Using the Atacama Large Millimetre/submillimeter Array (ALMA) and the Karl G. Jansky Very Large Array (VLA), we observed the Extended Green Object (EGO) G19.01−0.03 with sub-arcsec resolution from 1.05 mm to 5.01 cm wavelengths. Our ∼0.4 arcsec ∼ 1600 au angular resolution ALMA observations reveal a velocity gradient across the millimetre core MM1, oriented perpendicular to the previously known bipolar molecular outflow, which is consistently traced by 20 lines of 8 molecular species with a range of excitation temperatures, including complex organic molecules (COMs). Kinematic modelling shows the data are well described by models that include a disc in Keplerian rotation and infall, with an enclosed mass of 40–70 M⊙ (within a 2000 au outer radius) for a disc inclination angle of i = 40○, of which 5.4–7.2 M⊙ is attributed to the disc. Our new VLA observations show that the 6.7 GHz Class II methanol masers associated with MM1 form a partial ellipse, consistent with an inclined ring, with a velocity gradient consistent with that of the thermal gas. The disc-to-star mass ratio suggests the disc is likely to be unstable and may be fragmenting into as-yet-undetected low-mass stellar companions. Modelling the centimetre–millimetre spectral energy distribution of MM1 shows the ALMA 1.05 mm continuum emission is dominated by dust, whilst a free–free component, interpreted as a hypercompact H ii region, is required to explain the VLA ∼5 cm emission. The high enclosed mass derived for a source with a moderate bolometric luminosity (∼104 L⊙) suggests that the MM1 disc may feed an unresolved high-mass binary system." @default.
- W3205252004 created "2021-10-25" @default.
- W3205252004 creator A5003838660 @default.
- W3205252004 creator A5018186378 @default.
- W3205252004 creator A5018695775 @default.
- W3205252004 creator A5037814996 @default.
- W3205252004 creator A5041925486 @default.
- W3205252004 creator A5048726244 @default.
- W3205252004 creator A5062977460 @default.
- W3205252004 creator A5064894551 @default.
- W3205252004 creator A5070116789 @default.
- W3205252004 date "2021-10-18" @default.
- W3205252004 modified "2023-10-15" @default.
- W3205252004 title "ALMA observations of the Extended Green Object G19.01−0.03 – I. A Keplerian disc in a massive protostellar system" @default.
- W3205252004 cites W1965759414 @default.
- W3205252004 cites W1967591570 @default.
- W3205252004 cites W1969296052 @default.
- W3205252004 cites W1988977509 @default.
- W3205252004 cites W1989526936 @default.
- W3205252004 cites W1995295165 @default.
- W3205252004 cites W2004824351 @default.
- W3205252004 cites W2011301426 @default.
- W3205252004 cites W2032417424 @default.
- W3205252004 cites W2042948456 @default.
- W3205252004 cites W2045618388 @default.
- W3205252004 cites W2050723222 @default.
- W3205252004 cites W2069001906 @default.
- W3205252004 cites W2085868176 @default.
- W3205252004 cites W2088514135 @default.
- W3205252004 cites W2088885427 @default.
- W3205252004 cites W2089456990 @default.
- W3205252004 cites W2096967293 @default.
- W3205252004 cites W2104315216 @default.
- W3205252004 cites W2106404450 @default.
- W3205252004 cites W2116250513 @default.
- W3205252004 cites W2119967804 @default.
- W3205252004 cites W2121922788 @default.
- W3205252004 cites W2135625048 @default.
- W3205252004 cites W2141099472 @default.
- W3205252004 cites W2141687171 @default.
- W3205252004 cites W2146997260 @default.
- W3205252004 cites W2150529442 @default.
- W3205252004 cites W2153740973 @default.
- W3205252004 cites W2159234628 @default.
- W3205252004 cites W2159407551 @default.
- W3205252004 cites W2170292914 @default.
- W3205252004 cites W2203831943 @default.
- W3205252004 cites W2253645535 @default.
- W3205252004 cites W2256557871 @default.
- W3205252004 cites W2259968672 @default.
- W3205252004 cites W2342249984 @default.
- W3205252004 cites W2346416158 @default.
- W3205252004 cites W2464179076 @default.
- W3205252004 cites W2492315144 @default.
- W3205252004 cites W2512174018 @default.
- W3205252004 cites W2515384401 @default.
- W3205252004 cites W2545435752 @default.
- W3205252004 cites W2577624308 @default.
- W3205252004 cites W2588734690 @default.
- W3205252004 cites W2619172767 @default.
- W3205252004 cites W2762320293 @default.
- W3205252004 cites W2784264951 @default.
- W3205252004 cites W2784373895 @default.
- W3205252004 cites W2798793639 @default.
- W3205252004 cites W2890665350 @default.
- W3205252004 cites W2898351916 @default.
- W3205252004 cites W2901323531 @default.
- W3205252004 cites W2906781497 @default.
- W3205252004 cites W2915674877 @default.
- W3205252004 cites W2921551925 @default.
- W3205252004 cites W2940837164 @default.
- W3205252004 cites W2943341713 @default.
- W3205252004 cites W2955705365 @default.
- W3205252004 cites W2963102747 @default.
- W3205252004 cites W2969755760 @default.
- W3205252004 cites W2994838019 @default.
- W3205252004 cites W3000746797 @default.
- W3205252004 cites W3004274978 @default.
- W3205252004 cites W3044887751 @default.
- W3205252004 cites W3098048894 @default.
- W3205252004 cites W3098156411 @default.
- W3205252004 cites W3098347791 @default.
- W3205252004 cites W3098666278 @default.
- W3205252004 cites W3098782485 @default.
- W3205252004 cites W3099497699 @default.
- W3205252004 cites W3099878876 @default.
- W3205252004 cites W3100321222 @default.
- W3205252004 cites W3100392348 @default.
- W3205252004 cites W3100525339 @default.
- W3205252004 cites W3100847552 @default.
- W3205252004 cites W3101077555 @default.
- W3205252004 cites W3101124249 @default.
- W3205252004 cites W3101207100 @default.
- W3205252004 cites W3101680572 @default.
- W3205252004 cites W3101749985 @default.
- W3205252004 cites W3101828659 @default.
- W3205252004 cites W3102087921 @default.
- W3205252004 cites W3102108197 @default.