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  • Carrillo, I.Leibniz Institute for Astrophysics Potsdam (AIP) (author)

Is the Milky Way still breathing? RAVE-Gaia streaming motions

  • Article/chapterEnglish2018

Publisher, publication year, extent ...

  • 2018-01-05
  • Oxford University Press (OUP),2018
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:su-154699
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-154699URI
  • https://doi.org/10.1093/mnras/stx3342DOI
  • https://lup.lub.lu.se/record/3f8e60ca-e36d-4cd0-949d-5ae9401b550dURI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • We use data from the Radial Velocity Experiment (RAVE) and the Tycho-Gaia astrometric solution (TGAS) catalogue to compute the velocity fields yielded by the radial (V-R), azimuthal (V-phi), and vertical (V-z) components of associated Galactocentric velocity. We search in particular for variation in all three velocity components with distance above and below the disc midplane, as well as how each component of V-z (line-of-sight and tangential velocity projections) modifies the obtained vertical structure. To study the dependence of velocity on proper motion and distance, we use two main samples: a RAVE sample including proper motions from the Tycho-2, PPMXL, and UCAC4 catalogues, and a RAVE-TGAS sample with inferred distances and proper motions from the TGAS and UCAC5 catalogues. In both samples, we identify asymmetries in V-R and V-z. Below the plane, we find the largest radial gradient to be partial derivative V-R/partial derivative R = -7.01 +/- 0.61 km s(-1) kpc(-1), in agreement with recent studies. Above the plane, we find a similar gradient with partial derivative V-R/partial derivative R = -9.42 +/- 1.77 km s(-1) kpc(-1). By comparing our results with previous studies, we find that the structure in V-z is strongly dependent on the adopted proper motions. Using the Galaxia Milky Way model, we demonstrate that distance uncertainties can create artificial wave-like patterns. In contrast to previous suggestions of a breathing mode seen in RAVE data, our results support a combination of bending and breathing modes, likely generated by a combination of external or internal and external mechanisms.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Minchev, I.Leibniz Institute for Astrophysics Potsdam (AIP) (author)
  • Kordopatis, G.Leibniz Institute for Astrophysics Potsdam (AIP),Côte d'Azur Observatory,University of Hull,Heidelberg University (author)
  • Steinmetz, M.Leibniz Institute for Astrophysics Potsdam (AIP) (author)
  • Binney, J.University of Oxford (author)
  • Anders, F.Leibniz Institute for Astrophysics Potsdam (AIP) (author)
  • Bienayme, O.University of Strasbourg (author)
  • Bland-Hawthorn, J.University of Sydney (author)
  • Famaey, B.University of Strasbourg (author)
  • Freeman, K. C.Australian National University (author)
  • Gilmore, G.Stockholm University,Leibniz Institute for Astrophysics Potsdam (AIP),University College London,Johns Hopkins University (author)
  • Gibson, B. K. (author)
  • Grebel, E. K. (author)
  • Helmi, A.University of Groningen (author)
  • Just, A.Heidelberg University (author)
  • Kunder, A.Leibniz Institute for Astrophysics Potsdam (AIP),Saint Martin's University (author)
  • McMillan, P.Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science(Swepub:lu)astr-pmi (author)
  • Monari, GiacomoStockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),Leibniz Institut für Astrophysik Potsdam (AIP), Germany(Swepub:su)gmona (author)
  • Munari, U.INAF - Osservatorio Astronomico di Padova (author)
  • Navarro, J.University of Victoria (author)
  • Parker, Q. A.University of Hong Kong (author)
  • Reid, W.Macquarie University, Sydney,Western Sydney University (author)
  • Seabroke, G. (author)
  • Sharma, S.University of Sydney (author)
  • Siebert, A.University of Strasbourg (author)
  • Watson, F.Australian Astronomical Observatory (author)
  • Wojno, J.Leibniz Institute for Astrophysics Potsdam (AIP) (author)
  • Wyse, R. F. G. (author)
  • Zwitter, T.University of Ljubljana (author)
  • Leibniz Institute for Astrophysics Potsdam (AIP)Côte d'Azur Observatory (creator_code:org_t)

Related titles

  • In:Monthly notices of the Royal Astronomical Society: Oxford University Press (OUP)475:2, s. 2679-26960035-87111365-2966

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