J/ApJ/653/53 z∼6 galaxies UV luminosity function (Bouwens+, 2006)
Galaxies at z∼6: the UV luminosity function and luminosity density from
506 HUDF, HUDF parallel ACS field, and GOODS i-dropouts.
Bouwens R.J., Illingworth G.D., Blakeslee J.P., Franx M.
<Astrophys. J., 653, 53-85 (2006)>
=2006ApJ...653...53B 2006ApJ...653...53B
ADC_Keywords: Galaxies, photometry ; Ultraviolet
Keywords: galaxies: evolution - galaxies: high-redshift
Abstract:
We have detected 506 i-dropouts (z∼6 galaxies) in deep, wide-area HST
ACS fields: HUDF, enhanced GOODS, and HUDF parallel ACS fields
(HUDF-Ps). The contamination levels are ≲8% (i.e., ≳92% are at z∼6).
With these samples, we present the most comprehensive, quantitative
analyses of z∼6 galaxies yet and provide optimal measures of the UV
luminosity function (LF) and luminosity density at z∼6, and their
evolution to z∼3. We redetermine the size and color evolution from z∼6
to z∼3. Field-to-field variations (cosmic variance), completeness,
flux, and contamination corrections are modeled systematically and
quantitatively.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 61 43 A sample of intrinsic red (i-z)>1, (z-J)>0.8 (AB
scale) objects identified in the CDF-S GOODS field
table3.dat 77 20 i-z>1.3 point-like (stellar) sources not
included in our i-dropout compilation
table4.dat 78 122 UDF i-dropout sample
table5.dat 67 68 HUDF-Ps i-dropout sample
table6.dat 78 332 GOODS i-dropout sample
table18.dat 77 15 i-dropouts in the HUDF which were blended with
foreground galaxies in our main HUDF catalog
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See also:
II/261 : GOODS initial results (Giavalisco+, 2004)
J/AJ/132/1023 : U-band dropouts in Hubble Ultra Deep Field (Wadadekar+, 2006)
J/AJ/132/1729 : Hubble Ultra Deep Field BVI-dropout sources (Beckwith+, 2006)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Hour of Right Ascension (J2000) (1)
4- 5 I2 min RAm Minute of Right Ascension (J2000) (1)
7- 11 F5.2 s RAs Second of Right Ascension (J2000) (1)
13 A1 --- DE- Sign of the Declination (J2000) (1)
14- 15 I2 deg DEd Degree of Declination (J2000) (1)
17- 18 I2 arcmin DEm Arcminute of Declination (J2000) (1)
20- 23 F4.1 arcsec DEs Arcsecond of Declination (J2000) (1)
25- 29 F5.2 mag zmag The z band (AB) magnitude
31- 34 F4.2 mag e_zmag Error in zmag
36 A1 --- l_i-z Limit on i-z
37- 39 F3.1 mag i-z The (i-z) (AB) color index
41 A1 --- l_v-z Limit on v-z
42- 44 F3.1 mag v-z The (v-z) (AB) color index
46 A1 --- l_z-J Limit on z-J
47- 50 F4.1 mag z-J ? The (z-J) (AB) color index (2)
52 A1 --- l_z-K Limit on z-K
53- 56 F4.1 mag z-K ? The (z-Ks) (AB) color index (2)
58- 61 F4.2 arcsec rhl The half-light radius
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Note (1): These objects are most likely low-redshift interlopers and were
helpful in optimizing our selection cuts to avoid contamination.
Objects identified as GOODS JHHMMSS.ss+DDMMSS.s in Simbad
Note (2): The z850-J and z850-Ks colors were measured with respect to
the J+Ks ISAAC imaging (Section 2.3: Vandame et al. 2006, in prep.)
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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- 15 A15 --- [BIB2006] Object ID
17- 18 I2 h RAh Hour of Right Ascension (J2000)
20- 21 I2 min RAm Minute of Right Ascension (J2000)
23- 27 F5.2 s RAs Second of Right Ascension (J2000)
29 A1 --- DE- Sign of the Declination (J2000)
30- 31 I2 deg DEd Degree of Declination (J2000)
33- 34 I2 arcmin DEm Arcminute of Declination (J2000)
36- 39 F4.1 arcsec DEs Arcsecond of Declination (J2000)
41- 45 F5.2 mag zmag The z band (AB) magnitude
47- 50 F4.2 mag e_zmag Error in zmag
52 A1 --- l_i-z Limit on i-z
53- 55 F3.1 mag i-z The (i-z) (AB) color index
57 A1 --- l_z-J Limit on z-J
58- 61 F4.1 mag z-J ? The (z-J) (AB) color index
63 A1 --- l_z-K Limit on z-K
64- 67 F4.1 mag z-K ? The (z-Ks) (AB) color index
69- 72 F4.2 --- S/G The star/galaxy separator (1)
74- 77 F4.2 arcsec rhl The half-light radius
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Note (1): SExtractor stellarity parameter, for which 0 = extended object,
and 1 = point source (objects with S/G>0.75 and z850,AB<26.8 are
taken to be stars and thus not included here).
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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- 13 A13 --- [BIB2006] Object ID
14 A1 --- n_[BIB2006] [*] Contamination flag (1)
16- 17 I2 h RAh Hour of Right Ascension (J2000)
19- 20 I2 min RAm Minute of Right Ascension (J2000)
22- 26 F5.2 s RAs Second of Right Ascension (J2000)
28 A1 --- DE- Sign of the Declination (J2000)
29- 30 I2 deg DEd Degree of Declination (J2000)
32- 33 I2 arcmin DEm Arcminute of Declination (J2000)
35- 38 F4.1 arcsec DEs Arcsecond of Declination (J2000)
40- 44 F5.2 mag zmag The z band (AB) magnitude
46- 49 F4.2 mag e_zmag Error in zmag
51 A1 --- l_i-z Limit on (i-z)
52- 54 F3.1 mag i-z The (i-z) color index (AB) (2)
56 A1 --- l_z-J Limit on z-J
57- 60 F4.1 mag z-J ? The (z-J) index (AB) (2)
62 A1 --- l_J-H Limit on J-H
63- 66 F4.1 mag J-H ? The (J-H) index (AB) (2)
68 A1 --- n_J-H [n] Flag on J-H (3)
70- 73 F4.2 --- S/G The star/galaxy separator (4)
75- 78 F4.2 arcsec rhl The half-light radius
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Note (1): * = the z-Ks colors indicate that this object is likely a
low-redshift contaminant.
Note (2): Typical errors on the (i-z), (z-J), and (J-H) colors were 0.3,
0.2-0.3, and 0.3-0.4 magnitudes, respectively.
Note (3): n = not detected at 2σ in either J or H, making their
colors very uncertain. Objects with NULL J-H values were not observed
in J or H.
Note (4): SExtractor stellarity parameter, for which 0 = extended object,
and 1 = point source (objects with S/G>0.75 and z850,AB<28.4 are
taken to be stars and thus not included here).
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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- 17 A17 --- [BIB2006] Object ID
19- 20 I2 h RAh Hour of Right Ascension (J2000)
22- 23 I2 min RAm Minute of Right Ascension (J2000)
25- 29 F5.2 s RAs Second of Right Ascension (J2000)
31 A1 --- DE- Sign of the Declination (J2000)
32- 33 I2 deg DEd Degree of Declination (J2000)
35- 36 I2 arcmin DEm Arcminute of Declination (J2000)
38- 41 F4.1 arcsec DEs Arcsecond of Declination (J2000)
43- 47 F5.2 mag zmag The z band (AB) magnitude
49- 52 F4.2 mag e_zmag Error in zmag
54 A1 --- l_i-z Limit on i-z
55- 57 F3.1 mag i-z The (i-z) (AB) color index (1)
59- 62 F4.2 --- S/G The star/galaxy separator (2)
64- 67 F4.2 arcsec rhl The half-light radius
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Note (1): Typical errors on the (i-z) colors were 0.3 magnitudes.
Note (2): SExtractor stellarity parameter, for which 0 = extended object,
and 1 = point source (objects with S/G >0.75 and z850,AB<27.5 are
taken to be stars and thus not included here).
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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- 15 A15 --- [BIB2006] Object ID
16 A1 --- n_[BIB2006] [*] Contamination flag (1)
18- 19 I2 h RAh Hour of Right Ascension (J2000)
21- 22 I2 min RAm Minute of Right Ascension (J2000)
24- 28 F5.2 s RAs Second of Right Ascension (J2000)
30 A1 --- DE- Sign of the Declination (J2000)
31- 32 I2 deg DEd Degree of Declination (J2000)
34- 35 I2 arcmin DEm Arcminute of Declination (J2000)
37- 40 F4.1 arcsec DEs Arcsecond of Declination (J2000)
42- 46 F5.2 mag zmag The z band (AB) magnitude
48- 51 F4.2 mag e_zmag Error in zmag
53 A1 --- l_i-z Limit on i-z
54- 56 F3.1 mag i-z The (i-z) (AB) color index
58 A1 --- l_z-J Limit on z-J
59- 62 F4.1 mag z-J ? The (z-J) (AB) color index
64 A1 --- l_z-K Limit on z-K
65- 68 F4.1 mag z-K ? The (z-Ks) (AB) color index
70- 73 F4.2 --- S/G The star/galaxy separator (2)
75- 78 F4.2 arcsec rhl The half-light radius
--------------------------------------------------------------------------------
Note (1): * = the z-Ks colors indicate that this object is likely a
low-redshift contaminant.
Note (2): SExtractor stellarity parameter, for which 0 = extended object,
and 1 = point source (objects with S/G > 0.75 and z850,AB < 26.8 are
taken to be stars and thus not included here).
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Byte-by-byte Description of file: table18.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 --- [BIB2006] Object ID (1)
15- 16 I2 h RAh Hour of Right Ascension (J2000)
18- 19 I2 min RAm Minute of Right Ascension (J2000)
21- 25 F5.2 s RAs Second of Right Ascension (J2000)
27 A1 --- DE- Sign of the Declination (J2000)
28- 29 I2 deg DEd Degree of Declination (J2000)
31- 32 I2 arcmin DEm Arcminute of Declination (J2000)
34- 37 F4.1 arcsec DEs Arcsecond of Declination (J2000)
39- 43 F5.2 mag zmag The z band (AB) magnitude
45- 48 F4.2 mag e_zmag Error in zmag
50 A1 --- l_i-z Limit on i-z
51- 53 F3.1 mag i-z The (i-z) (AB) color index (2)
55 A1 --- l_z-J Limit on z-J
56- 59 F4.1 mag z-J ? The (z-J) (AB) color index (2)
61 A1 --- l_J-H Limit on J-H
62- 65 F4.1 mag J-H ? The (J-H) (AB) color index (2)
67 A1 --- n_J-H [n] Flag on J-H (3)
69- 72 F4.2 --- S/G The star/galaxy separator (4)
74- 77 F4.2 arcsec rhl The half-light radius
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Note (1): Objects in this catalog were found (Appendix D.1) using a more
aggressive splitting parameter (DEBLEND_MINCONT=0.0001) than used in
the main catalog (DEBLEND_MINCONT=0.15: see Section 3). Adding these
sources to our main catalogs would increase the total of i-dropouts in
the HUDF by ∼7%.
Note (2): Typical errors on the (i-z), (z-J), and (J-H) colors were 0.3,
0.2-0.3, and 0.3-0.4 magnitudes, respectively.
Note (3): n = not detected at 2σ in either J or H, making their
colors very uncertain. Objects with NULL J-H values were not observed
in J or H.
Note (4): SExtractor stellarity parameter, for which 0 = extended object,
and 1 = point source (objects with S/G>0.75 and z850,AB<28.4 are
taken to be stars and thus not included here).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 31-Jul-2008