J/ApJS/156/345 Surface photometry of BCD galaxies (Gil de Paz+, 2005)
Palomar/Las Campanas imaging atlas of blue compact dwarf galaxies.
II. Surface photometry and the properties of the underlying stellar population.
Gil de Paz A., Madore B.F.
<Astrophys. J. Suppl. Ser., 156, 345-360 (2005)>
=2005ApJS..156..345G 2005ApJS..156..345G
ADC_Keywords: Galaxies, nearby ; Galaxies, photometry ; Photometry, H-alpha
Keywords: atlases - galaxies: dwarf - galaxies: evolution -
galaxies: fundamental parameters - galaxies: photometry -
galaxies: starburst
Abstract:
We present the results from an analysis of surface photometry of B, R,
and Hα images of a total of 114 nearby galaxies
(vhelio<4000km/s) drawn from the Palomar/Las Campanas Imaging Atlas
of blue compact dwarf (BCD) galaxies. Surface brightness and color
profiles for the complete sample have been obtained. We determine the
exponential and Sersic profiles that best fit the surface brightness
distribution of the underlying stellar population detected in these
galaxies. We also compute the (B-R) color and total absolute magnitude
of the underlying stellar population and compared them to the
integrated properties of the galaxies in the sample.
Description:
In Paper I (Gil de Paz+, 2003, J/ApJS/147/29) we presented an
extensive description of the observations. Briefly, we observed 86 of
the 114 Atlas galaxies at the Palomar 60 inch (1.524m) telescope using
a 2048x2048 CCD in B, R, and the appropriately redshifted Hα
narrowband filter (Δλ∼20Å). The remaining 28 galaxies
were observed at the Las Campanas Observatory 100 inch (2.54m) (du
Pont) telescope using a similar 2048x2048 CCD (with narrowband
Hα of Δλ∼65Å).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 67 114 Exponential-law fitting parameters
table2.dat 144 114 Sersic-law fitting parameters
table3.dat 79 114 Properties of the underlying stellar population
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See also:
J/AJ/146/104 : Dwarf galaxies surface brightness profiles I. (Herrmann+, 2013)
J/ApJ/744/44 : Hα and UV fluxes in nearby galaxies (Weisz+, 2012)
J/MNRAS/384/1544 : Surface photometry of local dwarf galaxies (Sharina+, 2008)
J/ApJS/147/29 : BRHalpha data of blue compact dwarf galaxies (Gil De Paz+ 2003)
J/A+A/390/863 : CCD R Photometry of WHISP Dwarf Galaxies (Swaters, 2002)
J/A+A/388/29 : BR photometry of 25 southern dwarf galaxies (Parodi+, 2002)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Galaxy Name
15- 19 F5.1 arcsec rBe Best-fitting exponential B band profile
scale length αB
21- 23 F3.1 arcsec e_rBe Uncertainty in rBe
25- 29 F5.2 mag/arcsec2 Bmue Extrapolated B band central surface
brightness µB,0
31- 34 F4.2 mag/arcsec2 e_Bmue Uncertainty in Bmue
36- 39 F4.2 --- x2Be Reduced χ2 of B band exponential fit
41- 45 F5.1 arcsec rRe Best-fitting exponential R band profile
scale length αR
47- 49 F3.1 arcsec e_rRe Uncertainty in rRe
51- 55 F5.2 mag/arcsec2 Rmue Extrapolated R band central surface
brightness µR,0
57- 60 F4.2 mag/arcsec2 e_Rmue Uncertainty in Rmue
62- 65 F4.2 --- x2Re Reduced χ2 of R band exponential fit
67 A1 --- f_x2Re [ab] Possible χ2 underestimate (1)
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Note (1): Notes on χ2, defined as follows:
a = Errors in the points used for the fit are correlated. χ2 could
be underestimated.
b = Errors strongly correlated. The value of χ2 should be considered
a lower limit (see text for details).
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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- 13 A13 --- Name Galaxy Name
15- 18 F4.2 --- 1/nB Best-fitting B band Sersic profile index
(1/nB)
20- 23 F4.2 --- e_1/nB Uncertainty in 1/nB
25 A1 --- l_rB Limit flag on rB
26- 31 F6.2 arcsec rB Best-fitting B band Sersic profile
scale length rB,0
33- 37 F5.2 arcsec e_rB ? Uncertainty in rB
39- 43 F5.2 mag/arcsec2 Bmu ? Best-fitting B band Sersic profile
extrapolated central surface brightness
µB,0
45 A1 --- f_Bmu [c] large Bmu uncertainty (2)
47- 50 F4.2 mag/arcsec2 e_Bmu ? Uncertainty in Bmu
52- 55 F4.2 --- x2B Reduced χ2 of best B band Sersic
profile fit
57- 60 F4.2 --- 1/nR Best-fitting R band Sersic profile index
(1/nR)
62- 65 F4.2 --- e_1/nR Uncertainty in 1/nR
67 A1 --- l_rR Limit flag on rR
68- 72 F5.2 arcsec rR Best-fitting R band Sersic profile
scale length rR,0
74- 79 F6.2 arcsec e_rR ? Uncertainty in rR
81- 85 F5.2 mag/arcsec2 Rmu ? Best-fitting R band Sersic profile
extrapolated central surface brightness
µR,0
87 A1 --- f_Rmu [c] large Rmu uncertainty (2)
89- 92 F4.2 mag/arcsec2 e_Rmu ? Uncertainty in Rmu
94- 97 F4.2 --- x2R Reduced χ2 of best R band Sersic
profile fit
99-102 F4.2 --- 1/nHa ? Best-fitting Hα band Sersic
profile index 1/nHα
104-107 F4.2 --- e_1/nHa ? Uncertainty in 1/nHa
109 A1 --- l_rHa Limit flag on rHa
110-114 F5.2 arcsec rHa ? Best-fitting Hα band Sersic
profile scale length rHα,0
116-119 F4.2 arcsec e_rHa ? Uncertainty in rHa
121-126 F6.2 [mW/m2/arcsec2] logfHa ? Log of the best-fitting Hα
Sersic profile extrapolated central
surface brightness fHα,0 (3)
128 A1 --- f_logfHa [c] large logfHa uncertainty (2)
130-133 F4.2 [mW/m2/arcsec2] e_logfHa ? Uncertainty in logfHa
135 A1 --- l_x2Ha Limit flag on x2Ha
136-142 F7.2 --- x2Ha ? Reduced χ2 of best Hα
Sersic profile fit
144 A1 --- f_x2Ha [de] correlated errors (2)
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Note (2): Flag as follows:
c = These quantities have uncertainties larger than 10mag/arcsec2 (10dex)
in µB,0 or µR,0 (logfHα,0). In those cases where the
best Sersic fit yielded (unrealistic) negative values for the B and R
bands extrapolated central surface brightness no data are given.
d = Errors in the points used for the fit are correlated. χ2r (best)
could be underestimated.
e = Errors strongly correlated. The value of χ2r (best) should be
considered a lower limit (see text for details).
Note (3): In units of erg/s/cm2/arcsec2.
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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- 13 A13 --- Name Galaxy Name
15- 19 F5.2 mag Bmag Total B-band magnitude of the best-fitting
exponential profile (4)
21- 24 F4.2 mag e_Bmag Uncertainty in Bmag
26- 30 F5.2 mag Rmag Total R-band magnitude of the best-fitting
exponential profile (4)
32- 35 F4.2 mag e_Rmag Uncertainty in Rmag
37- 41 F5.2 mag (B-R)e The (B-R) color of the underling stellar
population in the region where the best-fitting
exponential profile was derived
43- 46 F4.2 mag e_(B-R)e Uncertainty in (B-R)e
48- 52 F5.2 mag (B-R)ec Same as (B-R)E but corrected for line and
nebular-continuum
54- 57 F4.2 mag e_(B-R)ec Uncertainty in (B-R)ec
59- 63 F5.2 mag (B-R)S The (B-R) color of the underling stellar
population in the region where the best-fitting
Sersic profile was derived
65- 68 F4.2 mag e_(B-R)S Uncertainty in (B-R)S
70- 74 F5.2 mag (B-R)Sc Same as (B-R)S but corrected for line and
nebular-continuum
76- 79 F4.2 mag e_(B-R)Sc Uncertainty in (B-R)Sc
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Note (4): Fitted to the USP (underlying stellar population) surface brightness
distribution.
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History:
From electronic version of the journal
References:
Gil De Paz et al., Paper I, 2003ApJS..147...29G 2003ApJS..147...29G, Cat. J/ApJS/147/29
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 26-Jul-2005