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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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file 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
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) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
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
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
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 66 A1 --- n_OID [b] Note (2)
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.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
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
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.
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
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)
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.
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
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
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
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
Byte-by-byte Description of file: table7.dat
Bytes Format Units Label Explanations
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) for discussion of this object
Byte-by-byte Description of file: table8.dat
Bytes Format Units Label Explanations
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) for discussion of this object
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.
Byte-by-byte Description of file: table9.dat
Bytes Format Units Label Explanations
1- 2 A2 --- Type [SK R OA] Type (1) 4- 5 A2 --- ID Identification letter for knots (<RFD A>) 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
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
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)
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 08-Jun-2012
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