J/ApJ/803/29 HSTPROMO catalogs. II. Kinematic profiles (Watkins+, 2015)
Hubble Space Telescope proper motion (HSTPROMO) catalogs of Galactic
globular cluster.
II. Kinematic profiles and maps.
Watkins L.L., van der Marel R.P., Bellini A., Anderson J.
<Astrophys. J., 803, 29 (2015)>
=2015ApJ...803...29W 2015ApJ...803...29W
ADC_Keywords: Clusters, globular ; Velocity dispersion
Keywords: globular clusters: individual; proper motions;
stars: kinematics and dynamics
Abstract:
We present kinematical analyses of 22 Galactic globular clusters using
the Hubble Space Telescope proper motion catalogs recently presented
in Bellini et al. (Paper I, 2014ApJ...797..115B 2014ApJ...797..115B). For most clusters,
this is the first proper-motion study ever performed, and, for many,
this is the most detailed kinematic study of any kind. We use cleaned
samples of bright stars to determine binned velocity-dispersion and
velocity-anisotropy radial profiles and two-dimensional
velocity-dispersion spatial maps. Using these profiles, we search for
correlations between cluster kinematics and structural properties.
The profiles and maps presented here can provide a basis for detailed
dynamical modeling of individual globular clusters. Given the quality
of the data, this is likely to provide new insights into a range of
topics concerning globular cluster mass profiles, structure, and
dynamics.
Description:
In Bellini et al. (2014, J/ApJ/797/115, Paper 1), we recently
presented a set of Hubble Space Telescope (HST) proper-motion catalogs
for 22 Milky Way globular clusters. These catalogs are the result of a
search through archival HST data to find fields in Galactic globular
clusters that had been previously observed for other projects at
multiple epochs, allowing us to measure proper motions. Thanks to both
the stability and longevity of HST, we were able to achieve
exceptional precision over baselines of up to 12yr. We begin here an
analysis of the kinematical profiles and maps for each of the 22
clusters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 90 22 Characteristic quantities for our clusters
tablea1.dat 111 528 One-dimensional kinematic profiles
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See also:
VII/202 : Globular Clusters in the Milky Way (Harris, 1997)
J/ApJ/797/115 : HSTPROMO I. Observations and NGC7078 results (Bellini+, 2014)
J/ApJ/769/107 : RVs and [Fe/H] of star members of NGC 6388 (Lanzoni+, 2013)
J/MNRAS/426/1137 : Radial velocities in NGC 1851 (Sollima+, 2012)
J/AcA/62/357 : Proper motions in 6 globular clusters (Zloczewski+, 2012)
J/ApJ/738/186 : HST and DEIMOS measurements of NGC 2419 stars (Ibata+, 2011)
J/A+A/542/A129 : NGC 2808 central kinematics (Luetzgendorf+, 2012)
J/A+A/528/A127 : Radial velocities in the globular NGC 2808 (Moni Bidin+, 2011)
J/A+A/525/A148 : Radial velocities in two globular clusters (Scarpa+, 2011)
J/MNRAS/396/2183 : Rvel of red giants in ω Cen (Sollima+ 2009)
J/AJ/135/2141 : F814W+F606W photometry of NGC 6397 faint stars (Richer+, 2008)
J/A+A/462/L9 : Radial velocities in NGC 7099 (Scarpa+, 2007)
J/ApJS/161/304 : Star clusters in the MW and satellites (McLaughlin+, 2005)
J/A+A/417/597 : Radial velocities in 4 globular clusters (Recio-Blanco+, 2004)
J/AJ/121/916 : HST obs. of NGC 2298, 5897, 6535, and 6626 (Testa+, 2001)
J/A+A/333/479 : NGC 1851 dynamical and evolutionary properties (Saviane+ 1998)
J/AJ/106/1508 : Dynamics of globular cluster NGC 362 (Fischer+ 1993)
J/A+AS/93/311 : Relative proper motions in NGC 362 (Tucholke 1992)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [NGC]
5- 8 I4 --- NGC [104/7099] Cluster identifier (NGC number)
10- 25 A16 --- OName Other name
27- 31 F5.1 arcsec Rc [1.8/142.2] Core radius (1)
33- 37 F5.1 arcsec Rh [30.6/300] Half-light radius (1)
39- 42 F4.1 kpc Dist [2.3/26.5] Heliocentric distance (1)
44- 47 F4.1 km/s Sig0 [2.4/18.9]? Central dispersion estimate (1)
49- 51 F3.1 km/s e_Sig0 [0.2/1.2]? Sig0 uncertainty (1)
53- 56 F4.2 --- ell [0.01/0.2]? Ellipticity (1)
58- 61 F4.2 [yr] logTc [4.9/9.6] Core relaxation time (1)
63- 67 F5.2 [yr] logTm [8.2/10.1] Half-mass relaxation time (1)
69- 72 F4.2 --- c [0.9/2.2]? King concentration (2)
74- 77 F4.2 --- e_c [0.03/0.2]? c uncertainty (2)
79- 81 I3 deg PA [2/147]? Position angle θ (3)
83- 86 F4.1 km/s Vrot [0/12.9]? Rotation amplitude (4)
88- 90 F3.1 km/s e_Vrot [0/2]? Vrot uncertainty (4)
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Note (1): from Harris (1996, VII/195; superseded by VII/202)
Note (2): from McLaughlin+, J/ApJS/161/304
Note (3): from White & Shawl (1987ApJ...317..246W 1987ApJ...317..246W)
Note (4): from Bellazzini et al. (2012A&A...538A..18B 2012A&A...538A..18B)
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [NGC]
4- 7 I4 --- NGC [104/7099] Cluster identifier (NGC number)
9- 10 I2 --- Bin [1/30] Bin number
12- 15 I4 --- Ns [25/2232] Number of stars
17- 31 F15.11 arcsec Rad [1.6/237] Mean radius
33- 47 F15.12 arcsec e_Rad [0.1/40] Uncertainty in Rad
49- 63 F15.13 mas/yr sigma [0.054/0.92] Combined radial and tangential
velocity dispersion
65- 80 F16.14 mas/yr e_sigma [0.002/0.09] Uncertainty in sigma
82- 95 F14.12 --- Ratio [0.5/1.9] Tangential/radial velocity anisotropy
97-111 F15.13 --- e_Ratio [0.01/0.5] Uncertainty in Ratio
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History:
From electronic version of the journal
References:
Bellini et al. Paper I. 2014ApJ...797..115B 2014ApJ...797..115B Cat. J/ApJ/797/115
Watkins et al. Paper II. 2015ApJ...803...29W 2015ApJ...803...29W This catalog
Watkins et al. Paper III. 2015ApJ...812..149W 2015ApJ...812..149W Cat. J/ApJ/812/149
Baldwin et al. Paper IV. 2016ApJ...827...12B 2016ApJ...827...12B Cat. J/ApJ/827/12
Bellini et al. Paper V. 2017ApJ...844..167B 2017ApJ...844..167B
Libralato et al. Paper VI. 2018ApJ...861...99L 2018ApJ...861...99L Cat. J/ApJ/861/99
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 29-Jul-2015