dc.contributor.author | Dagtekin, N. D. | |
dc.contributor.author | Seabroke, G. M. | |
dc.contributor.author | Onal, O. | |
dc.contributor.author | Yontan, T. | |
dc.contributor.author | Gilmore, Gerard | |
dc.contributor.author | Bilir, S. | |
dc.contributor.author | Karaali, S. | |
dc.contributor.author | Ak, Serap | |
dc.date.accessioned | 2021-03-06T10:21:09Z | |
dc.date.available | 2021-03-06T10:21:09Z | |
dc.identifier.citation | Bilir S., Karaali S., Ak S., Onal O., Dagtekin N. D. , Yontan T., Gilmore G., Seabroke G. M. , "Local stellar kinematics from RAVE data - III. Radial and vertical metallicity gradients based on red clump stars", MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, cilt.421, ss.3362-3374, 2012 | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | vv_1032021 | |
dc.identifier.other | av_e9f7ee6a-006a-495a-b169-08ca1b9600f7 | |
dc.identifier.uri | http://hdl.handle.net/20.500.12627/153704 | |
dc.identifier.uri | https://doi.org/10.1111/j.1365-2966.2012.20561.x | |
dc.description.abstract | We investigate radial and vertical metallicity gradients for a sample of red clump stars from the RAdial Velocity Experiment (RAVE) Data Release 3. We select a total of 6781 stars, using a selection of colour, surface gravity and uncertainty in the derived space motion, and calculate for each star a probabilistic (kinematic) population assignment to a thin or thick disc using space motion and additionally another (dynamical) assignment using stellar vertical orbital eccentricity. We derive almost equal metallicity gradients as a function of the Galactocentric distance for the high-probability thin-disc stars and for stars with vertical orbital eccentricities consistent with being dynamically young, ev= 0.07, i.e. d[M/H]/dRm=-0.041 +/- 0.003 and d[M/H]/dRm=-0.041 +/- 0.007 dex kpc-1. Metallicity gradients as a function of the distance from the Galactic plane for the same populations are steeper, i.e. d[M/H]/dzmax=-0.109 +/- 0.008 and d[M/H]/dzmax=-0.260 +/- 0.031 dex kpc-1, respectively. Rm and zmax are the arithmetic mean of the perigalactic and apogalactic distances, and the maximum distance to the Galactic plane, respectively. Samples including more thick-disc red clump giant stars show systematically shallower abundance gradients. These findings can be used to distinguish between different formation scenarios of the thick and thin discs. | |
dc.language.iso | eng | |
dc.subject | Temel Bilimler | |
dc.subject | Astronomi ve Astrofizik | |
dc.subject | Fizik | |
dc.subject | Temel Bilimler (SCI) | |
dc.subject | Uzay bilimi | |
dc.subject | ASTRONOMİ VE ASTROFİZİK | |
dc.title | Local stellar kinematics from RAVE data - III. Radial and vertical metallicity gradients based on red clump stars | |
dc.type | Makale | |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | |
dc.contributor.department | İstanbul Üniversitesi , Fen Fakültesi , Astronomi Ve Uzay Bilimleri Bölümü | |
dc.identifier.volume | 421 | |
dc.identifier.startpage | 3362 | |
dc.identifier.endpage | 3374 | |
dc.contributor.firstauthorID | 2219351 | |