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On the systematics of the Galactic centre distance determination from orbits of central stars. / Nikiforov, I.I.

In: Astronomical and Astrophysical Transactions. Journal of the Eurasian Astronomical Society, Vol. 27, No. 3, 2012, p. 465-468.

Research output: Contribution to journal › Article

Harvard

Nikiforov, II 2012, 'On the systematics of the Galactic centre distance determination from orbits of central stars', Astronomical and Astrophysical Transactions. Journal of the Eurasian Astronomical Society, vol. 27, no. 3, pp. 465-468. <http://www.aaptr.com/index.asp?lg=1&menu=840&mm=&Filtre=&Nomidretour=&NomLibRetour=&popup=&format=1121&titreformat=Current%20Issue:%3Cbr%3E%20Vol.%2027,%20Issue%203&zoom=&pln=&mc=&vue=NoVol=27%20and%20NoIssue=3&pg=1&rech=&tri=&mode=F&id=83&rc=14&bouton=&hc=>

APA

Nikiforov, I. I. (2012). On the systematics of the Galactic centre distance determination from orbits of central stars. Astronomical and Astrophysical Transactions. Journal of the Eurasian Astronomical Society, 27(3), 465-468. http://www.aaptr.com/index.asp?lg=1&menu=840&mm=&Filtre=&Nomidretour=&NomLibRetour=&popup=&format=1121&titreformat=Current%20Issue:%3Cbr%3E%20Vol.%2027,%20Issue%203&zoom=&pln=&mc=&vue=NoVol=27%20and%20NoIssue=3&pg=1&rech=&tri=&mode=F&id=83&rc=14&bouton=&hc=

Vancouver

Nikiforov II. On the systematics of the Galactic centre distance determination from orbits of central stars. Astronomical and Astrophysical Transactions. Journal of the Eurasian Astronomical Society. 2012;27(3):465-468.

Author

Nikiforov, I.I. / On the systematics of the Galactic centre distance determination from orbits of central stars. In: Astronomical and Astrophysical Transactions. Journal of the Eurasian Astronomical Society. 2012 ; Vol. 27, No. 3. pp. 465-468.

BibTeX

@article{b379b6d0ef9c4eb5b3b7e553506290cc,
title = "On the systematics of the Galactic centre distance determination from orbits of central stars",
abstract = "A simple analysis of the problem of solving stellar orbit around Sgr~A* to derive absolutely (geometrically) the distance to the Galactic centre, $R_0$,.. was used to demonstrate that neglect of plausible radial velocity of Sgr~A* relative the LSR (20--60~km\;s$^{-1}$) leads to a substantial systematic error in $R_0$---of at least 1.3--5.6\%, i.e.\ ${\sim}0.1$--$0.5$~kpc, for star S2/S0-2. Sgr~A*'s tangential motion can measurably increase this error. Relativistic and non-Keplerian ${\cal O}\left(V_r^2/c^2\right)$ effects should also be allowed for in orbit modelling to avoid an additional bias of the $R_0$ estimate.",
keywords = "Galaxy, Galactic centre distance, . Orbits of central stars, Motion of Sgr~A*, Relativity",
author = "I.I. Nikiforov",
year = "2012",
language = "English",
volume = "27",
pages = "465--468",
journal = "Astronomical and Astrophysical Transactions",
issn = "1055-6796",
publisher = "Cambridge Scientific Publishers",
number = "3",

}

RIS

TY - JOUR

T1 - On the systematics of the Galactic centre distance determination from orbits of central stars

AU - Nikiforov, I.I.

PY - 2012

Y1 - 2012

N2 - A simple analysis of the problem of solving stellar orbit around Sgr~A* to derive absolutely (geometrically) the distance to the Galactic centre, $R_0$,.. was used to demonstrate that neglect of plausible radial velocity of Sgr~A* relative the LSR (20--60~km\;s$^{-1}$) leads to a substantial systematic error in $R_0$---of at least 1.3--5.6\%, i.e.\ ${\sim}0.1$--$0.5$~kpc, for star S2/S0-2. Sgr~A*'s tangential motion can measurably increase this error. Relativistic and non-Keplerian ${\cal O}\left(V_r^2/c^2\right)$ effects should also be allowed for in orbit modelling to avoid an additional bias of the $R_0$ estimate.

AB - A simple analysis of the problem of solving stellar orbit around Sgr~A* to derive absolutely (geometrically) the distance to the Galactic centre, $R_0$,.. was used to demonstrate that neglect of plausible radial velocity of Sgr~A* relative the LSR (20--60~km\;s$^{-1}$) leads to a substantial systematic error in $R_0$---of at least 1.3--5.6\%, i.e.\ ${\sim}0.1$--$0.5$~kpc, for star S2/S0-2. Sgr~A*'s tangential motion can measurably increase this error. Relativistic and non-Keplerian ${\cal O}\left(V_r^2/c^2\right)$ effects should also be allowed for in orbit modelling to avoid an additional bias of the $R_0$ estimate.

KW - Galaxy

KW - Galactic centre distance

KW - . Orbits of central stars, Motion of Sgr~A

KW - Relativity

M3 - Article

VL - 27

SP - 465

EP - 468

JO - Astronomical and Astrophysical Transactions

JF - Astronomical and Astrophysical Transactions

SN - 1055-6796

IS - 3

ER -

ID: 5429091