Matches in SemOpenAlex for { <https://semopenalex.org/work/W2891905216> ?p ?o ?g. }
- W2891905216 endingPage "1191" @default.
- W2891905216 startingPage "1167" @default.
- W2891905216 abstract "We use the second data releases of the European Space AgencyGaia astrometric survey and the high-resolution Galactic Archaeology with HERMES (GALAH) spectroscopic survey to analyse the structure of our Galaxy’s disc components. With GALAH, we separate the α-rich and α-poor discs (with respect to Fe), which are superposed in both position and velocity space, and examine their distributions in action space. We study the distribution of stars in the zV|$mathrm{ z}$| phase plane, for both Vϕ and VR, and recover the remarkable ‘phase spiral’ discovered by Gaia. We identify the anticipated quadrupole signature in zV|$mathrm{ z}$| of a tilted velocity ellipsoid for stars above and below the Galactic plane. By connecting our work with earlier studies, we show that the phase spiral is likely to extend well beyond the narrow solar neighbourhood cylinder in which it was found. The phase spiral is a signature of corrugated waves that propagate through the disc, and the associated non-equilibrium phase mixing. The radially asymmetric distribution of stars involved in the phase spiral reveals that the corrugation, which is mostly confined to the α-poor disc, grows in z-amplitude with increasing radius. We present new simulations of tidal disturbance of the Galactic disc by the Sagittarius (Sgr) dwarf. The effect on the zV|$mathrm{ z}$| phase plane lasts |${gtrsim } 2, mathrm{Gyr}$|, but a subsequent disc crossing wipes out the coherent structure. We find that the phase spiral was excited |${lesssim } 0.5, mathrm{Gyr}$| ago by an object like Sgr with total mass ∼3 × 1010 M⊙ (stripped down from ∼5 × 1010 M⊙ when it first entered the halo) passing through the plane." @default.
- W2891905216 created "2018-09-27" @default.
- W2891905216 creator A5005304021 @default.
- W2891905216 creator A5005812567 @default.
- W2891905216 creator A5008934302 @default.
- W2891905216 creator A5009009028 @default.
- W2891905216 creator A5011243474 @default.
- W2891905216 creator A5014863777 @default.
- W2891905216 creator A5017172547 @default.
- W2891905216 creator A5020562473 @default.
- W2891905216 creator A5021267882 @default.
- W2891905216 creator A5024091569 @default.
- W2891905216 creator A5024917971 @default.
- W2891905216 creator A5034317478 @default.
- W2891905216 creator A5035013927 @default.
- W2891905216 creator A5038770526 @default.
- W2891905216 creator A5039005991 @default.
- W2891905216 creator A5043534145 @default.
- W2891905216 creator A5064352464 @default.
- W2891905216 creator A5070916916 @default.
- W2891905216 creator A5071935046 @default.
- W2891905216 creator A5080673982 @default.
- W2891905216 creator A5081645562 @default.
- W2891905216 creator A5083832150 @default.
- W2891905216 creator A5084285136 @default.
- W2891905216 creator A5084983787 @default.
- W2891905216 creator A5088453908 @default.
- W2891905216 creator A5090020735 @default.
- W2891905216 creator A5091741880 @default.
- W2891905216 date "2019-01-22" @default.
- W2891905216 modified "2023-10-15" @default.
- W2891905216 title "The GALAH survey and Gaia DR2: dissecting the stellar disc’s phase space by age, action, chemistry, and location" @default.
- W2891905216 cites W147232447 @default.
- W2891905216 cites W1629189762 @default.
- W2891905216 cites W1631788275 @default.
- W2891905216 cites W1782354873 @default.
- W2891905216 cites W1834459731 @default.
- W2891905216 cites W1921289443 @default.
- W2891905216 cites W1936382589 @default.
- W2891905216 cites W1963642624 @default.
- W2891905216 cites W1964026845 @default.
- W2891905216 cites W1965209244 @default.
- W2891905216 cites W1974740758 @default.
- W2891905216 cites W1985873501 @default.
- W2891905216 cites W1990490704 @default.
- W2891905216 cites W1990985723 @default.
- W2891905216 cites W1995256529 @default.
- W2891905216 cites W1998084400 @default.
- W2891905216 cites W2014312985 @default.
- W2891905216 cites W2016734711 @default.
- W2891905216 cites W2019893990 @default.
- W2891905216 cites W2030384121 @default.
- W2891905216 cites W2033011260 @default.
- W2891905216 cites W2035547408 @default.
- W2891905216 cites W2038307337 @default.
- W2891905216 cites W2041542911 @default.
- W2891905216 cites W2054188041 @default.
- W2891905216 cites W2067692551 @default.
- W2891905216 cites W2068967919 @default.
- W2891905216 cites W2076859346 @default.
- W2891905216 cites W2079992486 @default.
- W2891905216 cites W2080439624 @default.
- W2891905216 cites W2082929737 @default.
- W2891905216 cites W2083601827 @default.
- W2891905216 cites W2085357651 @default.
- W2891905216 cites W2085871228 @default.
- W2891905216 cites W2088581152 @default.
- W2891905216 cites W2088913565 @default.
- W2891905216 cites W2090747960 @default.
- W2891905216 cites W2091416343 @default.
- W2891905216 cites W2092458366 @default.
- W2891905216 cites W2098564368 @default.
- W2891905216 cites W2100893534 @default.
- W2891905216 cites W2109138120 @default.
- W2891905216 cites W2121480729 @default.
- W2891905216 cites W2125174497 @default.
- W2891905216 cites W2127327620 @default.
- W2891905216 cites W2136484893 @default.
- W2891905216 cites W2137694230 @default.
- W2891905216 cites W2142824603 @default.
- W2891905216 cites W2147668299 @default.
- W2891905216 cites W2148301921 @default.
- W2891905216 cites W2160299852 @default.
- W2891905216 cites W2162578329 @default.
- W2891905216 cites W2170011509 @default.
- W2891905216 cites W2202826494 @default.
- W2891905216 cites W2206917439 @default.
- W2891905216 cites W2216753448 @default.
- W2891905216 cites W2237029308 @default.
- W2891905216 cites W2412637781 @default.
- W2891905216 cites W2463543304 @default.
- W2891905216 cites W2509043249 @default.
- W2891905216 cites W2520926510 @default.
- W2891905216 cites W2594838509 @default.
- W2891905216 cites W2603123366 @default.
- W2891905216 cites W2610450871 @default.
- W2891905216 cites W2611127029 @default.
- W2891905216 cites W2736099699 @default.