The GALAH survey: velocity fluctuations in the Milky Way using Red Clump giants
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Khanna, Shourya; Sharma, Sanjib; Bland-Hawthorn, Joss; Hayden, Michael; Nataf, David M.; Ting, Yuan-Sen; Kos, Janez; Martell, Sarah; Zwitter, T.; De Silva, Gayandhi; Asplund, Martin; Duong, Ly; Lin, Jane; Nordlander, Thomas
Description
If the Galaxy is axisymmetric and in dynamical equilibrium, we expect negligible fluctuations in the residual line-of-sight velocity field. Recent results using the APOGEE survey find significant fluctuations in velocity for stars in the mid-plane (|z| <0.25 kpc) out to 5 kpc, suggesting that the dynamical influence of non-axisymmetric features, i.e. the Milky Way's bar, spiral arms, and merger events extends out to the Solar neighbourhood. Their measured power spectrum has a characteristic...[Show more]
Collections | ANU Research Publications |
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Date published: | 2018-10-30 |
Type: | Journal article |
URI: | http://hdl.handle.net/1885/232502 |
Source: | Monthly Notices of the Royal Astronomical Society |
DOI: | 10.1093/mnras/sty2924 |
Access Rights: | Open Access |
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01_Khanna_The_GALAH_survey%3A_velocity_2019.pdf | 6.8 MB | Adobe PDF | ![]() |
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