J/AJ/140/75 Antennae galaxies (NGC 4038/4039) revisited (Whitmore+, 2010)
The Antennae galaxies (NGC 4038/4039) revisited: Advanced Camera for Surveys and
NICMOS observations of a prototypical merger.
Whitmore B.C., Chandar R., Schweizer F., Rothberg B., Leitherer C.,
Rieke M., Rieke G., Blair W.P., Mengel S., Alonso-Herrero A.
<Astron. J., 140, 75-109 (2010)>
=2010AJ....140...75W 2010AJ....140...75W
ADC_Keywords: Galaxies, photometry; Populations, stellar; Associations, stellar
Keywords: galaxies: individual (NGC 4038, NGC 4039) - galaxies: interactions -
galaxies: star clusters: general
Abstract:
The Advanced Camera for Surveys and the Near Infrared Camera and
Multi-Object Spectrometer (NICMOS) have been used to obtain new Hubble
Space Telescope images of NGC 4038/4039 ("The Antennae"). These new
observations allow us to better differentiate compact star clusters
from individual stars, based on both size and color.
Description:
Observations of the main bodies of NGC 4038/39 were made with the
Hubble Space Telescope (HST), using the ACS, as part of Program
GO-10188. Multi-band photometry was obtained in the following optical
broadband filters: F435W (∼B), F550M (∼V), and F814W (∼I).
Archival F336W photometry of the Antennae (Program GO-5962) was used
to supplement our optical ACS/WFC observations.
Infrared observations were made using the Near Infrared Camera and
Multi-Object Spectrometer (NICMOS) camera on HST as part of Program
GO-10188. Observations were made using the NIC2 camera with the F160W,
F187N, and F237M filters, and the NIC3 camera with the F110W, F160W,
F164W, F187N, and F222M filters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
antennae.dat 138 60788 Antennae catalog of point-like objects
table1.dat 58 26 Training Set 1: isolated stars
table2.dat 66 42 Training Set 1: old globular clusters
table3.dat 79 10 Training Set 2 (NW extension):
intermediate-age clusters
table4.dat 83 23 Training Set 3 (Knot S): mixed stars and clusters
table5.dat 60 13 Training Set 3 (Knot S): brightest candidate
yellow and blue stars
table6.dat 99 50 50 most luminous clusters
table7.dat 117 50 50 most massive clusters
table8.dat 130 50 50 brightest NICMOS clusters
table9.dat 56 43 Properties of knots, regions, and outer areas
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See also:
J/AJ/109/960 : Young star clusters in The Antennae (Whitmore+ 1995)
J/ApJ/561/727 : BVI photometry in the Antennae galaxies (Zhang+, 2001)
J/ApJ/599/1049 : Supergiant molecular complexes in the Antennae (Wilson+, 2003
J/AJ/127/660 : Photometry in southern tail of the Antennae (Saviane+, 2004)
J/ApJ/635/280 : Star clusters in the Antennae galaxies (Brandl+, 2005)
J/ApJS/166/211 : Chandra sources in Antennae galaxies (Zezas+, 2006)
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Byte-by-byte Description of file: antennae.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- ID [1/60790] ID number, [WCS2010] NNNNN in Simbad
7- 8 I2 h RAh Right ascension (J2000)
10- 11 I2 min RAm Right ascension (J2000)
13- 19 F7.4 s RAs Right ascension (J2000)
21 A1 --- DE- Declination sign (J2000)
22- 23 I2 deg DEd Declination (J2000)
25- 26 I2 arcmin DEm Declination (J2000)
28- 33 F6.3 arcsec DEs Declination (J2000)
35- 40 F6.3 mag F336W ?=0 F336W magnitude (Vegamag system)
42- 49 F8.3 mag e_F336W ?=0 F336W uncertainty
51- 56 F6.3 mag F435W ?=0 F435W magnitude (Vegamag system)
58- 63 F6.3 mag e_F435W ?=0 F435W uncertainty
65- 70 F6.3 mag F550M F550M magnitude (Vegamag system)
72- 76 F5.3 mag e_F550M F550M uncertainty
78- 83 F6.3 mag F814W ?=0 F814W magnitude (Vegamag system)
85- 90 F6.3 mag e_F814W ?=0 F814W uncertainty
92- 98 F7.3 mW/m2 FF658N ?=0 Instrumental or relative F658N flux
100-104 F5.3 mW/m2 e_FF658N ?=0 F658N uncertainty
106-110 F5.3 mag CI Concentration Index (1pix-3pix radius in F550M)
112-118 F7.2 mag E(B-V) ?=-999 E(B-V) extinction estimate
120-126 F7.2 [yr] logAge ?=-999 Log of age estimate
128-138 F11.1 Msun Mass ?=-999 Mass estimate
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq Sequential number
4- 8 I5 --- ID ID number, [WCS2010] NNNNN in Simbad
10- 11 I2 h RAh Right ascension (J2000)
13- 14 I2 min RAm Right ascension (J2000)
16- 22 F7.4 s RAs Right ascension (J2000)
24 A1 --- DE- Declination sign (J2000)
25- 26 I2 deg DEd Declination (J2000)
28- 29 I2 arcmin DEm Declination (J2000)
31- 36 F6.3 arcsec DEs Declination (J2000)
38- 42 F5.2 mag Vmag V magnitude
44- 47 F4.2 --- C Concentration index (G1)
49- 53 F5.2 mag U-B ?=- U-B colour index
55- 58 F4.2 mag V-I ?=- V-I colour index
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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- 2 A2 --- Type [PG AG AF] Type (1)
4- 5 I2 --- Seq Sequential number
7- 11 I5 --- ID ID number, [WCS2010] NNNNN in Simbad
13- 14 I2 h RAh Right ascension (J2000)
16- 17 I2 min RAm Right ascension (J2000)
19- 25 F7.4 s RAs Right ascension (J2000)
27 A1 --- DE- Declination sign (J2000)
28- 29 I2 deg DEd Declination (J2000)
31- 32 I2 arcmin DEm Declination (J2000)
34- 39 F6.3 arcsec DEs Declination (J2000)
41- 46 F6.2 mag VMAG Absolute V magnitude
48- 51 F4.2 --- C Concentration index (G1)
53- 57 F5.2 mag U-B ?=- U-B colour index
59- 62 F4.2 mag V-I ?=- V-I colour index
64- 65 I2 --- OID ? Old ID, Whitmore et al., 1999AJ....118.1551W 1999AJ....118.1551W
66 A1 --- n_OID [b] Note (2)
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Note (1): Types as follows:
PG = Previous Good Candidates
AG = Additional Good Candidates
AF = Additional Fair Candidates
Note (2): b: Likely star, based on small value of C.
See Appendix A.1 for discussion.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1 I1 --- Seq ? Sequential number
2- 3 A2 --- n_Seq [LS] LS for Likely Star
5- 9 I5 --- ID ID number, [WCS2010] NNNNN in Simbad
11- 12 I2 h RAh Right ascension (J2000)
14- 15 I2 min RAm Right ascension (J2000)
17- 23 F7.4 s RAs Right ascension (J2000)
25 A1 --- DE- Declination sign (J2000)
26- 27 I2 deg DEd Declination (J2000)
29- 30 I2 arcmin DEm Declination (J2000)
32- 37 F6.3 arcsec DEs Declination (J2000)
39- 44 F6.2 mag VMAG Absolute V magnitude
45 A1 --- n_VMAG [a] Note on VMAG (1)
47- 50 F4.2 --- C Concentration index (G1)
52- 56 F5.2 mag U-B ?=- U-B colour index
58- 61 F4.2 mag V-I ?=- V-I colour index
63- 66 F4.2 mag E(B-V) Redenning
68- 71 F4.2 [yr] logtau ?=- Age
73- 79 E7.3 Msun Mass ?=- Mass
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Note (1): a: This magnitude is meaningless if the object is a foreground
star, but is included in case the object turns out to be a cluster.
See the text for discussion.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1 A1 --- Type [CS] Candidate Clusters (C) or Stars (S)
3- 4 I2 --- Seq Sequential number
6- 10 I5 --- ID ID number, [WCS2010] NNNNN in Simbad
12- 13 I2 h RAh Right ascension (J2000)
15- 16 I2 min RAm Right ascension (J2000)
18- 24 F7.4 s RAs Right ascension (J2000)
26 A1 --- DE- Declination sign (J2000)
27- 28 I2 deg DEd Declination (J2000)
30- 31 I2 arcmin DEm Declination (J2000)
33- 38 F6.3 arcsec DEs Declination (J2000)
40- 45 F6.2 mag VMAG Absolute V magnitude
47- 50 F4.2 --- C Concentration index (G1)
51 A1 --- n_C [a] Note on C (1)
53- 57 F5.2 mag U-B ?=- U-B colour index
59- 63 F5.2 mag V-I ?=- V-I colour index
65- 68 F4.2 mag E(B-V) Redenning
70- 73 F4.2 [yr] logtau ?=- Age
74 A1 --- n_logtau [a] Note on logtau (1)
76- 82 E7.3 Msun Mass ?=- Mass
83 A1 --- n_Mass [a] Note on Mass (1)
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Note (1): a: These objects are likely to be clusters, based on C and their
positions in the two-color diagram, hence age and mass values are included.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1 A1 --- Type [YB] Yellow (Y) or Blue (B) stars
3 I1 --- Seq Sequential number
5- 9 I5 --- ID ID number, [WCS2010] NNNNN in Simbad
11- 12 I2 h RAh Right ascension (J2000)
14- 15 I2 min RAm Right ascension (J2000)
17- 23 F7.4 s RAs Right ascension (J2000)
25 A1 --- DE- Declination sign (J2000)
26- 27 I2 deg DEd Declination (J2000)
29- 30 I2 arcmin DEm Declination (J2000)
32- 37 F6.3 arcsec DEs Declination (J2000)
39- 43 F5.2 mag VMAG Absolute V magnitude
45- 48 F4.2 --- C Concentration index (G1)
50- 54 F5.2 mag U-B U-B colour index
56- 60 F5.2 mag V-I V-I colour index
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq Sequential number
4- 8 I5 --- ID ID number, [WCS2010] NNNNN in Simbad
10- 11 I2 h RAh Right ascension (J2000)
13- 14 I2 min RAm Right ascension (J2000)
16- 22 F7.4 s RAs Right ascension (J2000)
24 A1 --- DE- Declination sign (J2000)
25- 26 I2 deg DEd Declination (J2000)
28- 29 I2 arcmin DEm Declination (J2000)
31- 36 F6.3 arcsec DEs Declination (J2000)
38- 43 F6.2 mag VMAG Absolute V magnitude
45- 48 F4.2 --- C Concentration index. Values of C>1.51 are
required for inclusion in this table (G1)
50- 54 F5.2 mag U-B ?=- U-B colour index
56- 60 F5.2 mag V-I ?=- V-I colour index
62- 65 F4.2 mag E(B-V) Redenning
67- 70 F4.2 [yr] logtau ?=- Age
72- 78 E7.3 Msun Mass ?=- Mass
80- 81 I2 --- Rank ? Rank order from Table 7
83- 99 A17 --- Com Comments
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq Sequential number
4- 8 I5 --- ID ID number, [WCS2010] NNNNN in Simbad
10- 11 I2 h RAh Right ascension (J2000)
13- 14 I2 min RAm Right ascension (J2000)
16- 22 F7.4 s RAs Right ascension (J2000)
24 A1 --- DE- Declination sign (J2000)
25- 26 I2 deg DEd Declination (J2000)
28- 29 I2 arcmin DEm Declination (J2000)
31- 36 F6.3 arcsec DEs Declination (J2000)
38- 43 F6.2 mag VMAG Absolute V magnitude
45- 46 I2 --- Rank6 ? Rank order from Table 6
48- 51 F4.2 --- C Concentration index. Values of C>1.51 are
required for inclusion in this table (G1)
53- 57 F5.2 mag U-B ?=- U-B colour index
59- 63 F5.2 mag V-I ?=- V-I colour index
65- 68 F4.2 mag E(B-V) Redenning
70- 73 F4.2 [yr] logtau ?=- Age
75- 81 E7.3 Msun Mass ?=- Mass
83-116 A34 --- Com Comments
117 A1 --- Note [c] c: See Whitmore & Zhang
(2002AJ....124.1418W 2002AJ....124.1418W) for discussion of
this object
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq Sequential number
4- 8 I5 --- ID ID number, [WCS2010] NNNNN in Simbad
10- 11 I2 h RAh Right ascension (J2000)
13- 14 I2 min RAm Right ascension (J2000)
16- 22 F7.4 s RAs Right ascension (J2000)
24 A1 --- DE- Declination sign (J2000)
25- 26 I2 deg DEd Declination (J2000)
28- 29 I2 arcmin DEm Declination (J2000)
31- 36 F6.3 arcsec DEs Declination (J2000)
38- 43 F6.2 mag VMAG Absolute V magnitude
44 A1 --- n_VMAG [c] Note on VMAG (1)
45- 46 I2 --- Rank6 ? Rank order from Table 6
48- 51 F4.2 --- C Concentration index. Values of C>1.51 are
required for inclusion in this table (G1)
52 A1 --- n_C [c] Note on C (1)
54- 58 F5.2 mag U-B ?=- U-B colour index
60- 64 F5.2 mag V-I ?=- V-I colour index
66- 70 F5.2 mag F110W F110W magnitude
72- 76 F5.2 mag F160W F160W magnitude
78- 82 F5.2 mag F222W F222W magnitude
84- 87 F4.2 mag E(B-V) Redenning
89- 93 F5.2 [yr] logtau ?=- Age
94 A1 --- n_logtau [b] b: Very questionable age estimate
96-102 E7.3 Msun Mass ?=- Mass
103-104 I2 --- Rank7 ? Rank order from Table 7
106 A1 --- n_Rank7 [bc] Note on Rank7 (1)
108-127 A20 --- Com Comments
130 A1 --- Note [d] d: See Whitmore & Zhang
(2002AJ....124.1418W 2002AJ....124.1418W) for discussion of
this object
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Note (1): Notes as follows:
b = Very questionable age estimate
c = Missing in Table 6 and/or Table 7 due to value of C<1.52.
Hence, it is possible that some of these are stars.
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Type [SK R OA] Type (1)
4- 5 A2 --- ID Identification letter for knots () or
number for regions (<[WS95] region NN>)
7 A1 --- Class [123-] Class (2)
9- 11 I3 --- N ?=- Number of clusters
13- 14 I2 --- N9 ?=- Number of clusters with MV←9
16- 21 F6.2 mag VMAG ?=- Bright absolute V magnitude
23- 26 F4.2 [yr] logtau Median age
28- 31 F4.2 [yr] e_logtau Dispersion in log tau. Note that low values
signify a single- rather than multi-age
population
33- 36 F4.2 mag E(B-V) ?=- Redenning
38- 42 F5.2 --- alpha ?=- alpha index, dN/dL∝Lalpha
44- 48 F5.2 --- beta ?=- beta index, dN/dM∝Mbeta
50- 56 A7 --- Range Range in log tau used in determination of
alpha and beta
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Note (1): Types as follows:
SK = Star-forming Knots
R = Regions
OA = Outer Areas
Note (2): Class as follows:
1 = has very dominant cluster(s)
2 = has dominant cluster(s)
3 = has no dominant cluster(s)
- = not relevant since a general region rather than single cluster complex
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Global Notes:
Note (G1): the concentration index is defined as the difference between
magnitudes measured within a 1 and a 3 pixel radius (see Whitmore et
al. 1999AJ....118.1551W 1999AJ....118.1551W)
History:
* 08-Jul-2012: From electronic version of the journal
* 04-Mar-2016: catalog antenna.dat added, from author,
whitmore(at)stsci.edu
(End) Patricia Vannier [CDS] 08-Jun-2012