J/ApJ/643/1011 Early-type stars in the center of the Galaxy (Paumard+, 2006)
The two young star disks in the central parsec of the Galaxy:
properties, dynamics, and formation.
Paumard T., Genzel R., Martins F., Nayakshin S., Beloborodov A.M.,
Levin Y., Trippe S., Eisenhauer F., Ott T., Gillessen S., Abuter R.,
Cuadra J., Alexander T., Sternberg A.
<Astrophys. J., 643, 1011-1035 (2006)>
=2006ApJ...643.1011P 2006ApJ...643.1011P
ADC_Keywords: Stars, nearby ; Stars, early-type ; Space velocities
Keywords: Galaxy: center - stars: early-type - stars: formation -
stars: luminosity function, mass function - stellar dynamics
Abstract:
We report the definite spectroscopic identification of ∼40 OB
supergiants, giants, and main-sequence stars in the central parsec of
the Galaxy. Detection of their absorption lines has become possible
with the high spatial and spectral resolution and sensitivity of the
adaptive optics integral field spectrometer SPIFFI/SINFONI on the ESO
VLT. Several of these OB stars appear to be helium- and nitrogen-rich.
Description:
Data are from various data sets we have been able to obtain with both
SPIFFI as a guest instrument (in 2003) and SINFONI during its
commissioning in 2004 and guaranteed time observation (GTO) runs in
2005. These data have been taken in the K band with a resolution
R=4000 (FWHM=85km/s) and in the H+K mode (R=1500, FWHM=230km/s).
Objects:
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RA (2000) DE Designation(s)
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17 45 40.0 -29 00 28 Galactic Center = Gal 000.0+00.0
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 133 90 Properties of early type stars (quality 1+2)
in the central parsec of the Galaxy
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See also:
J/A+AS/97/587 : JHK photometry of Galactic center stars (Ruelas-Mayorga+ 1993)
J/AJ/106/2291 : UBV photometry toward Galactic Center (Reed 1993)
J/ApJ/470/864 : JHKL photometry of the Galactic Center (Blum+, 1996)
J/ApJ/523/248 : Variable stars in the Galactic center (Ott+, 1999)
J/ApJ/597/323 : Cool stars at the Galactic Center (Blum+, 2003)
J/A+AS/139/231 : Early-type stars towards the Galactic Centre (Dufton+, 1999)
J/A+A/373/608 : Early-type stars towards the Galactic Center II (Dufton, 2001)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- [PGM2006] Sequential number (ENN)
5- 22 A18 --- Names Star name(s) (1)
24 A1 --- n_Names [bc] Note on stars (1)
26- 30 F5.2 arcsec p Projected distance to Sgr A*
32- 36 F5.2 arcsec X X coordinate of the 3D position (2)
38- 42 F5.2 arcsec Y Y coordinate of the 3D position (2)
44- 48 F5.2 arcsec Z ? Z coordinate of the 3D position (2)
50- 53 F4.2 arcsec e_Z ? The 1σ error in Z
55- 58 F4.1 mag Kmag Apparent K band magnitude
60- 63 I4 km/s VX ? The X component of the 3D velocity (3)
65- 67 I3 km/s e_VX ? The 1σ error in VX
69- 73 I5 km/s VY ? The Y component of the 3D velocity (3)
75- 76 I2 km/s e_VY ? The 1σ error in VY
78- 82 I5 km/s VZ The Z component of the 3D velocity
84- 86 I3 km/s e_VZ The 1σ error in VZ
88- 92 F5.2 --- J ? Sky-projected angular momentum
(J = Jz/Jz,max, eq. B1)
94- 97 F4.2 --- e_J ? The 1σ error in J
99-103 F5.3 --- e ? Eccentricity (4)
105-109 F5.3 --- e_e ? The 1σ error in e
111-122 A12 --- SpType Stellar MK type
124 I1 --- q_SpType [1,2] Quality as 2=highest, 1=good
126-129 F4.1 mag KMAG Absolute K band magnitude (5)
131-133 F3.1 mag e_KMAG The 1σ error in KMAG
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Note (1): Names and notes are:
SNN = [EG97] SNN in Simbad
SN-NN = [GKM98] SN-NN in Simbad
b = Designation from Genzel et al. (1997MNRAS.291..219G 1997MNRAS.291..219G),
([GEO97] WNN in Simbad) or
Paumard et al. (2001A&A...366..466, [PMM2001] AN).
c = cluster core (multiple object).
Note (2): Derived by Beloborodov et al. (2006, submitted).
Distances from Sgr A* as X=dα.cos(δ, Y=dδ, and
Z along the line of sight.
Note (3): Assuming R0=8kpc.
Note (4): For stars E1-E10, we quote Eisenhauer et al. (2005ApJ...628..246E 2005ApJ...628..246E)
who assume R0=8kpc.
For stars E11-E90, see Appendix C; we assume R0=7.62±0.32kpc.
Note (5): Assuming R0=7.62±0.32kpc.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 24-Aug-2007