The RAVE survey: constraining the local Galactic escape speed
Smith, Martin C; Ruchti, Gregory R; Helmi, Amina; Wyse, Rosemary F G; Fulbright, J.P.; Freeman, Kenneth; Navarro, J F; Seabroke, G M; Steinmetz, Matthias; Williams, Mary; Bienayme, O; Binney, J; Bland-Hawthorn, Joss; Dehnen, W; Gibson, Bradley K; Gilmore, Gerard; Grebel, E K; Munari, U; Parker, Quentin A; Scholz, R-D; Siebert, A; Watson, Fred G; Zwitter, T
We report new constraints on the local escape speed of our Galaxy. Our analysis is based on a sample of high-velocity stars from the RAVE survey and two previously published data sets. We use cosmological simulations of disc galaxy formation to motivate our assumptions on the shape of the velocity distribution, allowing for a significantly more precise measurement of the escape velocity compared to previous studies. We find that the escape velocity lies within the range 498 < vesc < 608 km s-1...[Show more]
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|Source:||Monthly Notices of the Royal Astronomical Society|
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