J/ApJ/546/694 NICMOS star formation history (Thompson +, 2001)
Star formation history in the NICMOS Northern Hubble Deep Field.
Thompson R.I., Weymann R.J., Storrie-Lombardi L.J.
<Astrophys. J. 546, 694 (2001)>
=2001ApJ...546..694T 2001ApJ...546..694T
ADC_Keywords: Galaxies, photometry ; Redshifts ; Extinction ;
Photometry, infrared
Mission_Name: HST
Keywords: Cosmology: observations - galaxies: evolution -
galaxies: fundamental parameters - galaxies: starburst -
stars: formation
Abstract:
We present the results of an extensive analysis of the star formation
rates determined from the NICMOS deep images of the northern Hubble
Deep Field. We use SED template fitting photometric techniques to
determine both the redshift and the extinction for each galaxy in our
field. Measurement of the individual extinctions provides a correction
for star formation hidden by dust obscuration. We determine star
formation rates for each galaxy based on the 1500Å UV flux and add
the rates in redshift bins of width 1.0 centered on integer redshift
values.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 104 281 Listing of measured quantities
--------------------------------------------------------------------------------
See also:
J/AJ/112/1335 : Hubble Deep Field observations (Williams+ 1996)
J/AJ/117/17 : Hubble Deep Field near-IR obs. (Thompson+, 1999)
J/ApJ/538/493 : HDF-South NICMOS field (Yahata+, 2000)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.5 --- NICMOS NICMOS identification number (1)
12- 19 A8 --- [WBD96] WFPC identification number from
Williams et al., 1996, Cat. J/AJ/112/1335
21- 24 F4.2 --- z Redshift
26- 29 F4.2 mag E(B-V) (B-V) color excess
31- 37 F7.3 solMass/yr SFR Star formation rate determined in Section 5
39- 46 E8.2 solLum Lum Bolometric luminosity (2)
48- 51 F4.2 --- Frac Fraction of the luminosity removed by
extinction and re-emitted in the
mid & far-IR
53- 60 E8.2 mJy SCUBA ? The SCUBA 850 microns flux
62- 64 F3.1 --- Temp Template number of best fit between
1.0 (early-cold) and 6.0 (late-hot)
66- 69 F4.1 --- Chi2 Modified Chi2 of the fit from Equ. 1 (3)
71- 74 F4.1 mag Totmag ? The F160W AB magnitude (4)
76- 79 F4.1 mag Apmag ? The 0.6" diameter aperture F160W magnitude
See note (5)
81- 82 I2 h RAh Right Ascension (J2000)
84- 85 I2 min RAm Right Ascension (J2000)
87- 91 F5.2 s RAs Right Ascension (J2000)
93 A1 --- DE- Declination (J2000)
94- 95 I2 deg DEd Declination (J2000)
97- 98 I2 arcmin DEm Declination (J2000)
100-104 F5.2 arcsec DEs Declination (J2000)
--------------------------------------------------------------------------------
Note (1): Objects with ID numbers less than 1000 are objects that are
identified with sources in the original KFOCAS catalog of Thompson et
al., 1999, Cat. J/AJ/117/17, [TSW99] NNN.NNN in Simbad.
Objects with catalog numbers greater than or equal to 1000 are
SExtractor objects that did not match in position with an original
catalog entry to within 0.3".
Note (2): The flux of a galaxy is obtained by integrating over the
unextincted selected template scaled by the factor A from equation 2.
The bolometric luminosity then follows from the redshift and our
adopted cosmology.
Note (3): It should be noted that the distribution of the modified chi2
values will not rigorously follow a true chi2 distribution. The
values are provided to give a qualitative indication of the relative
goodness of fit for the best fit values of redshift, template type and
E(B-V) from object to object.
Note (4): Derived from the aperture correction method described in
Yan et al., 1998ApJ...503L..19Y 1998ApJ...503L..19Y.
Note (5): If no magnitude is listed the object had a zero or negative
measured F160W flux.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 09-Mar-2001