J/A+A/502/91 Proper motions of stars near SgrA* (Schoedel+, 2009)
The nuclear star cluster of the Milky Way: proper motions and mass.
Schoedel R., Merritt D., Eckart A.
<Astron. Astrophys. 502, 91 (2009)>
=2009A&A...502...91S 2009A&A...502...91S
ADC_Keywords: Stars, nearby ; Proper motions ; Photometry, infrared
Keywords: instrumentation: adaptive optics -
techniques: high angular resolution - stars: kinematics -
Galaxy: center - Galaxy: structure
Description:
We used multi-epoch adaptive optics assisted near-infrared
observations of the central parsec of the Galaxy obtained with
NACO/CONICA at the ESO VLT. Stellar positions were measured via PSF
fitting in the individual images and transformed into a common
reference frame via suitable sets of reference stars. We measured the
proper motions of more than 6000 stars within about 1pc projected
distance of the supermassive black hole Sagittarius A*. The table
contains for each measured star its projected distance from
Sagittarius A*, its offsets in right ascension and declination from
Sagittarius A* along with the corresponding uncertainties, its proper
motion and the corresponding uncertainty in right ascension and
declination, the Ks-band magnitude and the corresponding uncertainty,
and its classification as early type in case such a classification
exists.
Objects:
----------------------------------------------
RA (2000) DE Designation(s)
----------------------------------------------
17 45 40.04 -29 00 28 SgrA* = Name SGR A*
----------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tableb1.dat 84 6124 List of stars with measured proper motion in
the Galactic center
--------------------------------------------------------------------------------
See also:
J/A+AS/97/587 : Galactic center stars JHK photometry (Ruelas-Mayorga+ 1993)
J/AJ/106/2291 : UBV photometry toward Galactic Center (Reed 1993)
J/A+AS/139/231 : Early-type stars towards the Galactic Centre (Dufton+, 1999)
J/ApJ/470/864 : JHKL photometry of the Galactic Center (Blum+, 1996)
J/A+A/373/608 : Early-type stars towards Galactic Center. II (Dufton+, 2001)
J/MNRAS/348/1439 : OGLE II Galactic center proper motions (Sumi+, 2004)
J/ApJ/642/861 : N-band imaging of the Galactic Center (Viehmann+, 2006)
Byte-by-byte Description of file: tableb1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- Seq Row number
6- 11 F6.3 arcsec Rp Projected distance from Sagittarius A*
13- 19 F7.3 arcsec oRA Offset from Sagittarius A* in Right ascension (1)
21- 25 F5.3 arcsec e_oRA Uncertainty of oRA
27- 33 F7.3 arcsec oDE Offset from Sagittarius A* in Declination (1)
35- 39 F5.3 arcsec e_oDE Uncertainty of oDE
41- 46 F6.1 km/s pmRA Proper motion in Right ascension (2)
48- 52 F5.1 km/s e_pmRA Uncertainty of pmRA (2)
54- 59 F6.1 km/s pmDE Proper motion in Declination (2)
61- 65 F5.1 km/s e_pmDE Uncertainty of pmDE (2)
67- 71 F5.2 mag Ksmag Magnitude in Ks band
73- 76 F4.2 mag e_Ksmag Uncertainty of Ksmag
78- 84 A7 --- Type Star classification (3)
--------------------------------------------------------------------------------
Note (1): SgrA* position: RA=17:45:40.0409, DE=-29:00:28.118 (J2000)
The position are given et the reference epoch Ep=J2004.44
Note (2): The conversion of the proper motions from arcsec per year to km/s
was done by assuming a distance of 8.0kpc to the Galactic centre.
Note (3): the classification is:
early 1 = identified as early-type star in Paumard et al., 2006,
Cat. J/ApJ/643/1011
early 2 = identified as early-type star in Buchholz et al.,
A&A, submitted (2009)
--------------------------------------------------------------------------------
Acknowledgements:
Rainer Schoedel, rainer(at)iaa.es
(End) Rainer Schoedel [IAA-CSIC, Spain], Patricia Vannier [CDS] 03-Mar-2009