J/ApJ/700/654 Keck spectroscopy of extragalactic HII regions (Esteban+ 2009)
Keck HIRES spectroscopy of extragalactic H II regions: C and O abundances from
recombination lines.
Esteban C., Bresolin F., Peimbert M., Garcia-Rojas J., Peimbert A.,
Mesa-Delgado A.
<Astrophys. J., 700, 654-678 (2009)>
=2009ApJ...700..654E 2009ApJ...700..654E
ADC_Keywords: Galaxies, nearby ; H II regions ; Spectroscopy
Keywords: galaxies: abundances - galaxies: individual (M31, M33, M83, M101,
NGC 1741, NGC 2366, NGC 2403, NGC 4395, NGC 4861) - galaxies: ISM -
galaxies: spiral - H II regions
Abstract:
We present very deep spectrophotometry of 14 bright extragalactic HII
regions belonging to spiral, irregular, and blue compact galaxies. The
data for 13 objects were taken with the High Resolution Echelle
Spectrometer on the Keck I telescope. We have measured CII
recombination lines in 10 of the objects and OII recombination lines
in eight of them. We have determined electron temperatures from line
ratios of several ions, especially those of low ionization potential.
Description:
The observations of the sample objects, except NGC 5447-a bright HII
region in the galaxy M101-were made on 2006 April 20 and 21 and
November 14 with the High Resolution Echelle Spectrometer (HIRES) at
the Keck I telescope on Mauna Kea Observatory.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
sources.dat 130 14 Journal of observations and Hβ values
tab234.dat 67 1837 Dereddened line intensity ratios with respect
to I(Hβ)=100 (Tables 2-4 of the paper)
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Byte-by-byte Description of file: sources.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Gal Host Galaxy
10- 20 A11 --- Name HII region name
22 A1 --- n_Name [bcdefg] Note (1)
24- 25 I2 h RAh Slit center right ascension (J2000.0)
27- 28 I2 min RAm Slit center right ascension (J2000.0)
30- 33 F4.1 s RAs Slit center right ascension (J2000.0)
35 A1 --- DE- Declination sign (J2000)
36- 37 I2 deg DEd Declination (J2000)
39- 40 I2 arcmin DEm Declination (J2000)
42- 43 I2 arcsec DEs Declination (J2000)
45- 49 F5.2 kpc RG ?=- Galactocentric distance
51- 55 F5.3 --- R/R0 ?=- Relative galactocentric distance R/R0
57- 66 A10 "YYYY/MM/DD" Date Observation date
68- 71 A4 --- Tel Telescope
73- 75 I3 deg PA Slit position angle
77- 82 A6 s t.exp Exposure time
84- 87 F4.2 --- cHb Hβ reddening constant
89- 92 F4.2 --- e_cHb rms uncertainty on cHb
94- 97 F4.2 10-16W/m2 FHb Integrated Hβ flux (10-13erg/cm2/s)
99-102 F4.2 10-16W/m2 e_FHb rms uncertainty on FHb
104-106 I3 0.1nm EWHb Hβ equivalent width
108-110 F3.1 0.1nm EWabs ? Equivalent width of the absorption in the
hydrogen lines, used to correct the
observed line intensities
112-115 F4.2 aW/m2 FWRb1 ? Flux of the W-R blue bump λ=4640Å
117-120 F4.2 aW/m2 e_FWRb1 ? rms uncertainty on FWRb1
122-125 F4.2 aW/m2 FWRb2 ? Flux of the W-R blue bump λ=4686Å
127-130 F4.2 aW/m2 e_FWRb2 ? rms uncertainty on FWRb2
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Note (1): Notes as follows:
b = Walterbos & Braun (1992, Cat. J/A+AS/92/625) and
Galarza et al. (1999AJ....118.2775G 1999AJ....118.2775G)
c = Zone C, Hickson (1982, Cat. VII/213)
d = Veron & Sauvayre (1965AnAp...28..698V 1965AnAp...28..698V)
e = Region no. 70, Cedres & Cepa (2002, Cat. J/A+A/391/809)
f = Brightest H II region of NGC 4861, Gil de Paz et al.
(2003, cat. J/ApJS/147/29)
g = Hodge et al. (1990, Cat. J/ApJS/73/661)
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Byte-by-byte Description of file: tab234.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name HII region name
13- 19 F7.2 0.1nm lambda0 ? Adopted laboratory wavelength
21- 28 A8 --- Ion Ion designation
30- 35 A6 --- line Line identification
37- 42 F6.3 --- Flambda ? Reddening curve normalized to Hβ using
the Seaton (1979MNRAS.187p..73S 1979MNRAS.187p..73S) law used
44- 50 F7.2 0.1nm lambda ?=- Observed wavelength in the heliocentric
rest frame
51 A1 --- n_lambda [abcde] Note on lambda (1)
53 A1 --- l_Int Limit flag on Int
54- 60 F7.3 --- Int ?=- Reddening-corrected flux relative to Hβ
61 A1 --- u_Int Uncertainty flag on Int
62- 67 F6.3 --- e_Int ? rms uncertainty on Int
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Note (1): Notes as follows:
a = Blended with the W-R blue bump emission at 4640Å
b = Blend of OII λ4649.13 and λ4650.84 lines
c = Blend of OI λ6046.23, λ6046.44, and λ6046.49 lines
d = Blend of [OII] λ7318.39 and λ7319.99 lines
e = Blend of [OII] λ7329.66 and λ7330.73 lines
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 10-Dec-2011