J/AJ/143/132 Surface brightness profiles of 10 globulars of M31 (Wang+, 2012)
Structural parameters for globular clusters in the outer halo of M31.
Wang S., Ma J.
<Astron. J., 143, 132 (2012)>
=2012AJ....143..132W 2012AJ....143..132W
ADC_Keywords: Galaxies, nearby ; Clusters, globular ; Photometry, surface
Keywords: galaxies: halos - galaxies: individual (M31) -
globular clusters: general
Abstract:
In this paper, we present internal surface brightness profiles, using
images in the F606W and F814W filter bands observed with the Advanced
Camera for Surveys on the Hubble Space Telescope, for 10 globular
clusters (GCs) in the outer halo of M31. Standard King models are
fitted to the profiles to derive their structural and dynamical
parameters. The results show that, in general, the properties of
clusters in M31 and the Milky Way fall in the same regions of
parameter spaces. The outer halo GCs of M31 have larger ellipticities
than most of the GCs in M31 and the Milky Way. Their large
ellipticities may be due to galaxy tides coming from satellite dwarf
galaxies of M31 or may be related to the apparently more vigorous
accretion or merger history that M31 has experienced. The tight
correlation of cluster binding energy Eb with mass Mmodindicates
that the "fundamental plane" does exist for clusters, regardless of
their host environments, which is consistent with previous studies.
Description:
We selected 10 Globular Clusters (GCs) (15kpc≲Rp≲100kpc) that have
been studied by Mackey et al. (2007ApJ...655L..85M 2007ApJ...655L..85M). The observations
were obtained with the HST Advanced Camera for Surveys (ACS) Wide
Field Channel (WFC) under HST program GO 10394 (PI: Tanvir), at
various intervals over the period 2005 May 27 to 2005 September 17.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 77 10 Integrated measurements for the 10 globular
clusters in the M31 halo
table2.dat 45 1376 The F606W, F814W intensity profiles of the
globular clusters in the M31 halo
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See also:
J/A+A/544/A155 : M31 globular clusters (Federici+, 2012)
J/A+A/531/A155 : HST photometry in six M31 globular clusters (Perina+, 2011)
J/AJ/140/1043 : GCs in M31 and the Galaxy (van den Bergh+, 2010)
J/A+A/508/1285 : Metallicity estimates of M31 GCs (Galleti+, 2009)
J/A+A/507/1375 : HST/ACS VI data of M31 globular clusters (Perina+, 2009)
J/AJ/138/770 : HST/WFPC survey of M31 bright young clusters (Hodge+, 2009)
J/AJ/137/94 : Star clusters in M31 (Caldwell+, 2009)
J/AJ/138/1667 : HST survey of young clusters in M31. III. (Barmby+, 2009)
J/ApJS/177/174 : Star clusters in M31 (Narbutis+, 2008)
J/AJ/134/706 : New globular clusters in M 31 (Kim+, 2007)
J/AJ/133/2764 : M31 globular clusters structural parameters (Barmby+, 2007)
J/A+A/471/127 : New globular clusters in M31 (Galleti+, 2007)
J/A+A/473/429 : HST VI photometry of Bol 514 in M31 (Federici+, 2007)
J/AJ/133/2764 : M31 globular clusters structural parameters (Barmby+, 2007)
J/A+A/456/985 : RVs of 76 M31 candidate clusters (Galleti+, 2006)
J/ApJS/161/304 : Star clusters in Milky Way and satellites (McLaughlin+, 2005)
J/AJ/130/1693 : HST-ACS observations of 5 globular clusters (Brown+, 2005)
J/A+A/416/917 : Revised Bologna Catalog of M31 GCs (Galleti+, 2004)
J/AJ/123/2490 : RV and [Fe/H] of M31 globular cluster system (Perrett+, 2002)
J/ApJ/559/851 : Young star cluster candidates in M31 (Williams+, 2001)
J/AJ/122/2458 : M31 globular clusters from HST (Barmby+, 2001)
J/AJ/119/727 : M31 globular clusters photometry (Barmby+, 2000)
J/AcA/48/455 : Globular clusters in M31 and M33 (Mochejska+, 1998)
J/AJ/114/1488 : Globulars in M31 (Holland+ 1997)
J/AJ/109/218 : Catalogue of globular cluster profiles (Trager+ 1995)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Cl M31 globular cluster identifier
5 A1 --- f_Cl [c] Individual note (1)
7- 10 F4.2 --- e606W ? Average ellipticity with the F606W filter
ε(F606W) (2)
12- 15 F4.2 --- u_e606W ? Uncertainty on e606W
17- 20 F4.2 --- e814W ? Average ellipticity with the F814W filter
ε(F814W) (2)
22- 25 F4.2 --- u_e814W ? Uncertainty on e814W
27- 30 I4 deg PA606W [-183/-91]? Position angle with the F606W filter
(measured in degrees anticlockwise from north)
32- 33 I2 deg u_PA606W ? Uncertainty on PA606W
35- 38 I4 deg PA814W [-165/-86]? Position angle with the F814W filter
(measured in degrees anticlockwise from north)
40- 41 I2 deg u_PA814W ? Uncertainty on PA814W
43- 48 F6.3 mag Vmag V band magnitude, Vegamag system (3)
50- 55 F6.3 mag Imag I band magnitude, Vegamag system
(from Huxor et al., 2008MNRAS.385.1989H 2008MNRAS.385.1989H)
57- 60 F4.1 kpc Dist Galactocentric distance (4)
62- 66 F5.2 mag (m-M)0 Distance modulus (4)
68- 71 F4.2 mag E(B-V) Reddening (4)
73- 77 F5.2 [Sun] [Fe/H] Metallicity (uncertainty is assumed to be 0.6
as Barmby et al. (2000, Cat. J/AJ/119/727)
suggested) (4)
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Note (1):
c = GC6 is called B298 in the version V4.0 of the Revised Bologna Catalogue
(RBC) (Galleti et al.; 2004, Cat. J/A+A/416/917; 2006, J/A+A/456/985;
2007, Cat. J/A+A/471/127; 2009, Cat. J/A+A/508/1285)
Note (2): Ellipticity e=1-b/a, where a and b are the lengths of the
semimajor and semiminor axes, respectively.
Note (3): from Huxor et al. (2008MNRAS.385.1989H 2008MNRAS.385.1989H), except V magnitude of
GC6 which is from Reed et al. (1992AJ....103..824R 1992AJ....103..824R).
Note (4): From Mackey et al. (2007ApJ...655L..85M 2007ApJ...655L..85M).
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Cl Globular cluster identifier
<[MHF2007] GC N> in Simbad
6- 8 A3 --- Det Detector identifier (WFC)
10- 14 A5 --- Filt Filter identifier (F606W or F814W)
16- 22 F7.4 arcsec Rad [0.026/20.5724] Radius
24- 32 F9.3 Lsun/pc2 Int [-0.3/34009] F606W and F814W-band
calibrated intensity (1)
34- 41 F8.3 Lsun/pc2 e_Int [0.025/1017.48] Uncertainty on Int
43- 45 A3 --- f_Int Profile flag (2)
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Note (1): Intensities were calibrated on the VEGAMAG scale. No extinction
correction has been applied.
Note (2): From Barmby et al., 2007, Cat. J/AJ/133/2764 and Mclaughlin et al.,
2008MNRAS.384..563M 2008MNRAS.384..563M), profile flag as follows:
BAD = the intensity value is deemed dubious because it strongly
deviates from its neighbors or is obviously affected by nearby
bright stars or image artifacts.
DEP = the radius is inside R<2pix=0.1" and the isophotal intensity is
dependent on its neighbors.
OK = none of the above apply and the point is used in model fitting.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 04-Jul-2013