J/ApJS/161/240 High-ionization emission in metal-deficient BCDs (Thuan+, 2005)
High-ionization emission in metal-deficient blue compact dwarf galaxies.
Thuan T.X., Izotov Y.I.
<Astrophys. J. Suppl. Ser., 161, 240-270 (2005)>
=2005ApJS..161..240T 2005ApJS..161..240T
ADC_Keywords: Abundances ; Equivalent widths ; H II regions
Keywords: galaxies: abundances - galaxies: evolution - galaxies: irregular -
galaxies: ISM
Abstract:
Primordial stars are expected to be very massive and hot, producing
copious amounts of hard ionizing radiation. The best place to study
hard ionizing radiation in the local universe is in very metal-
deficient blue compact dwarf (BCD) galaxies. We have carried out a MMT
spectroscopic search for [NeV] λ3426 (ionization potential of
7.1Ryd), [FeV] λ4227 (ionization potential of 4Ryd), and HeII
λ4686 (ionization potential of 4Ryd) emission in a sample of 18
BCDs. We have added data from previous work and from the Data Release
3 of the Sloan Digital Sky Survey (Cat. II/259). In total, we have
assembled a BCD high-ionization sample with [NeV] emission in four
galaxies, [FeV] emission in 15 galaxies, and HeII emission in 465
galaxies.
Description:
We have obtained new high signal-to-noise ratio spectrophotometric
observations for 26 HII regions in 18 BCDs and for one supergiant HII
region in the spiral galaxy M101 with the 6.5m MMT on the nights of
2004 February 1920 and 2005 February 4. Three BCDs were observed by
Izotov & Thuan (2004, Cat. J/ApJ/602/200) with the Kitt Peak 4m
telescope and five others were selected from the DR3 of the SDSS
(Abazajian et al. 2005, Cat. II/259).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 68 27 General parameters of galaxies
table3.dat 84 767 Emission line intensities and equivalent width
table4.dat 185 24 Ionic and total heavy element abundances
table5.dat 84 334 Emission line intensities and equivalent widths
in spectra obtained with other telescopes
table6.dat 358 9 Ionic and total heavy element abundances in
galaxies observed with other telescopes
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See also:
II/259 : The SDSS Photometric Catalog, Release 3 (Abazajian+ 2005)
J/ApJ/511/639 : Abundances in blue compact galaxies (Izotov+, 1999)
J/AZh/79/867 : Abundances of HII regions in blue galaxies (Holovatyy+, 2002)
J/ApJ/602/200 : HII regions abundances in blue compact galaxies (Izotov+ 2004)
J/A+A/419/469 : Abundances in the galaxy HS 0837+4717 (Pustilnik+, 2004)
J/ApJS/161/240 : High-ionization emission in metal-deficient BCDs (Thuan+,
2005)
J/A+A/448/955 : Abundances of emission galaxies in SDSS-DR3 (Izotov+, 2006)
J/ApJ/708/1076 : The WHIQII survey: compact blue galaxies (Tollerud+, 2010)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Galaxy name
13 A1 --- m_Name [AEW] Multiplicity flag on Name
15 A1 --- n_Name [ABC] Flag on Name (1)
17- 18 I2 h RAh Hour of Right Ascension (J2000.0)
20- 21 I2 min RAm Minute of Right Ascension (J2000.0)
23- 26 F4.1 s RAs Second of Right Ascension (J2000.0)
28 A1 --- DE- Sign of the Declination (J2000.0)
29- 30 I2 deg DEd Degree of Declination (J2000.0)
32- 33 I2 arcmin DEm Arcminute of Declination (J2000.0)
35- 36 I2 arcsec DEs Arcsecond of Declination (J2000.0)
38- 41 F4.1 mag pgmag Apparent photographic magnitude
43- 49 F7.5 --- z Redshift
51- 55 F5.1 mag pgMAG Absolute photographic magnitude
57- 68 A12 --- OName Other name
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Note (1): Flag on Name, defined as follows:
A = Galaxies observed with the MMT
B = Galaxies observed with the 4m KPNO telescope with detected
[FeV] λ4227 emission
C = SDSS galaxies with detected [FeV] λ4227 emission
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Byte-by-byte Description of file: table3.dat table5.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Galaxy name
13- 14 A2 --- m_Name Multiplicity flag on Name
16- 20 F5.3 --- CHb Hβ extinction coefficient
22- 27 F6.3 10-17W/m2 FHb Observed Hβ flux in
units of 10-14 erg/s/cm2
28- 31 F4.2 0.1nm EWabs Hydrogen absorption equivalent width
33- 36 I4 0.1nm lambda Wavelength (Å)
38- 51 A14 --- Ion Ion designation
53- 58 F6.2 --- F/FHb Observed flux relative to Hβ
60- 64 F5.2 --- e_F/FHb Statistical error in F/FHb
66- 71 F6.2 --- I/IHb Corrected flux relative to Hβ
73- 77 F5.2 --- e_I/IHb Statistical error in I/IHb
79- 84 F6.1 0.1nm EW Equivalent width of Ion
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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- 12 A12 --- Name Galaxy name
15- 16 A2 --- m_Name Multiplicity index on Name
18- 22 I5 K Te(OIII) OIII electron temperature
24- 27 I4 K e_Te(OIII) Error in Te(OIII)
29- 33 I5 K Te(OII) OII electron temperature
35- 37 I3 K e_Te(OII) Error in Te(OII)
39- 43 F5.3 10-4 O+/H+ O+/H+ abundance ratio
45- 49 F5.3 10-4 e_O+/H+ Error in O+/H+
51- 55 F5.3 10-4 O++/H+ O++/H+ abundance ratio
57- 61 F5.3 10-4 e_O++/H+ Error in O++/H+
63- 67 F5.3 10-6 O+++/H+ ? O+++/H+ abundance ratio
69- 73 F5.3 10-6 e_O+++/H+ ? Error in O+++/H+
75- 79 F5.3 10-4 O/H O/H abundance ratio
81- 85 F5.3 10-4 e_O/H Error in O/H
87- 91 F5.3 [---] 12+log(O/H) Oxygen abundance
93- 97 F5.3 [---] e_12+log(O/H) Error in log(O/H)
99-103 F5.3 10-5 Ne++/H+ Ne++/H+ abundance ratio
105-109 F5.3 10-5 e_Ne++/H+ Error in Ne++/H+
111-115 F5.3 --- ICF(Ne) ? Ionization correction factor
117-122 F6.3 [---] log(Ne/O) log(Ne/O) abundance ratio
124-128 F5.3 [---] e_log(Ne/O) Error in log(Ne/O)
130-134 F5.3 10-6 Fe++/H+1 ? Fe++(4658)/H+ abundance ratio
136-140 F5.3 10-6 e_Fe++/H+1 ? Error in Fe++/H+1
142-146 F5.3 10-6 Fe++/H+2 ? Fe++(4988)/H+ abundance ratio
148-152 F5.3 10-6 e_Fe++/H+2 ? Error in Fe++/H+2
154-159 F6.3 --- ICF(Fe) ? Ionization correction factor
161-166 F6.3 [---] log(Fe/O)1 ? log(Fe(4658)/O) abundance ratio
168-172 F5.3 [---] e_log(Fe/O)1 ? Error in log(Fe/O)1
174-179 F6.3 [---] log(Fe/O)2 ? log(Fe(4988)/O) abundance ratio
181-185 F5.3 [---] e_log(Fe/O)2 ? Error in log(Fe/O)2
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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- 12 A12 --- Name Galaxy name
15- 16 A2 --- m_Name Multiplicity index on Name
18- 22 I5 K TeOIII OIII electron temperature
24- 27 I4 K e_TeOIII Error in TeOIII
29- 33 I5 K TeOII OII electron temperature
35- 37 I3 K e_TeOII Error in TeOII
39- 43 I5 K TeSIII SIII electron temperature
45- 47 I3 K e_TeSIII Error in TeSIII
49- 52 I4 cm-3 NeSII SII electron number density
54- 56 I3 cm-3 e_NeSII Error in NeSII
58- 62 F5.3 10-4 O+/H+ O+/H+ abundance ratio
64- 68 F5.3 10-4 e_O+/H+ Error in O+/H+
70- 74 F5.3 10-4 O++/H+ O++/H+ abundance ratio
76- 80 F5.3 10-4 e_O++/H+ Error in O++/H+
82- 86 F5.3 10-6 O+++/H+ O+++/H+ abundance ratio
88- 92 F5.3 10-6 e_O+++/H+ Error in O+++/H+
94- 98 F5.3 10-4 O/H O/H abundance ratio
100-104 F5.3 10-4 e_O/H Error in O/H
106-110 F5.3 [---] 12+log(O/H) Oxygen abundance
112-116 F5.3 [---] e_12+log(O/H) Error in 12 + log(O/H)
118-122 F5.3 10-6 N+/H+ N+/H+ abundance ratio
124-128 F5.3 10-6 e_N+/H+ Error in N+/H+
130-134 F5.3 --- ICF(N) Ionization correction factor
136-141 F6.3 [---] log(N/O) log(N/O) abundance ratio
143-147 F5.3 [---] e_log(N/O) Error in log(N/O)
149-153 F5.3 10-5 Ne++/H+ Ne++/H+ abundance ratio
155-159 F5.3 10-5 e_Ne++/H+ Error in Ne++/H+
161-165 F5.3 --- ICF(Ne) Ionization correction factor
167-172 F6.3 [---] log(Ne/O) log(Ne/O) abundance ratio
174-178 F5.3 [---] e_log(Ne/O) Error in log(Ne/O)
180-184 F5.3 10-6 S+/H+ S+/H+ abundance ratio
186-190 F5.3 10-6 e_S+/H+ Error in S+/H+
192-196 F5.3 10-6 S++/H+ S++/H+ abundance ratio
198-202 F5.3 10-6 e_S++/H+ Error in S++/H+
204-208 F5.3 --- ICF(S) Ionization correction factor
210-215 F6.3 [---] log(S/O) log(S/O) abundance ratio
217-221 F5.3 [---] e_log(S/O) Error in log(S/O)
223-227 F5.3 10-8 Cl++/H+ ? Cl++/H+ abundance ratio
229-233 F5.3 10-8 e_Cl++/H+ ? Error in Cl++/H+
236-240 F5.3 --- ICF(Cl) ? Ionization correction factor
242-247 F6.3 [---] log(Cl/O) ? log(Cl/O) abundance ratio
249-253 F5.3 [---] e_log(Cl/O) ? Error in log(Cl/O)
259-263 F5.3 10-7 Ar++/H+ Ar++/H+ abundance ratio
265-269 F5.3 10-7 e_Ar++/H+ Error in Ar++/H+ (1e7)
272-276 F5.3 10-7 Ar+++/H+ ? Ar+++/H+ abundance ratio
278-282 F5.3 10-7 e_Ar+++/H+ ? Error in Ar+++/H+
285-289 F5.3 --- ICF(Ar) Ionization correction factor
291-296 F6.3 [---] log(Ar/O) log(Ar/O) abundance ratio
298-302 F5.3 [---] e_log(Ar/O) Error in log(Ar/O)
304-308 F5.3 10-6 Fe++/H+1 ? Fe++(4658)/H+ abundance ratio
310-314 F5.3 10-6 e_Fe++/H+1 ? Error in Fe++/H+1
316-320 F5.3 10-6 Fe++/H+2 ? Fe++(4988)/H+ abundance ratio
322-326 F5.3 10-6 e_Fe++/H+2 ? Error in Fe++/H+2
328-332 F5.3 --- ICF(Fe) ? Ionization correction factor
334-339 F6.3 [---] log(Fe/O)1 ? log(Fe(4658)/O) abundance ratio
341-345 F5.3 [---] e_log(Fe/O)1 ? Error in log(Fe/O)1
347-352 F6.3 [---] log(Fe/O)2 ? log(Fe(4988)/O)
354-358 F5.3 [---] e_log(Fe/O)2 ? Error in log(Fe/O)2
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 13-Jun-2006