J/A+A/481/645 HII regions in interacting galaxies (Ferreiro+, 2008)
Sample of minor merger of galaxies. II. Modelling HII region properties.
Ferreiro D.L., Pastoriza M.G., Rickes M.
<Astron. Astrophys., 481, 645-649 (2008)>
=2008A&A...481..645F 2008A&A...481..645F
ADC_Keywords: H II regions ; Galaxies, photometry ; Morphology
Keywords: galaxies: interactions - galaxies: starburst - galaxies: photometry -
publications, bibliography
Abstract:
Studies of interacting galaxies have shown that dwarf galaxies may be
produced in tidal tails during collisions. Numerical simulations
suggest that the total detachment of the tidal dwarf requires the
companion's mass to be comparable to or higher than that of the parent
galaxy. This would imply that minor mergers (interaction between
unequal mass galaxies) might not form tidal dwarf galaxies (TDGs).
The objectives of the paper is to analyse the main properties of a
sample of 116 HII regions previously selected from Hα images
of 11 minor mergers of galaxies and discuss the nature of these
regions comparing their properties with those observed in HII regions
in normal and isolated galaxies and TDG candidates.
Individual parameters such as: blue absolute magnitude, MB, Hα
luminosity, L(Hα), star formation rate, SFR(Hα) and mass,
M/M☉ of these regions were derived and compared with those of
the HII regions in normal isolated galaxies, as well as in tidal dwarf
candidates.
Description:
The sample selection, observations, and data reduction were described
in detail in Ferreiro & Pastoriza, 2004, Cat. J/A+A/428/837
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea.dat 128 116 HII region properties in a sample of minor merger
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See also:
J/A+A/428/837 : HII regions in minor mergers of galaxies (Ferreiro+, 2004)
Byte-by-byte Description of file: tablea.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- HII HII Region designation, N for Nucleus
3- 6 A4 --- n_[FP2004] [(N?) ] Nucleus ?
8- 19 A12 --- [FP2004] Arp galaxy designation
21- 22 I2 h RAh Right ascension (J2000)
24- 25 I2 min RAm Right ascension (J2000)
27- 30 F4.1 s RAs Right ascension (J2000)
32 A1 --- DE- Declination sign (J2000)
33- 34 I2 deg DEd Declination (J2000)
36- 37 I2 arcmin DEm Declination (J2000)
39- 42 F4.1 arcsec DEs Declination (J2000)
44- 49 F6.2 mag BMAG Absolute B magnitude
51- 54 F4.2 mag e_BMAG rms uncertainty on BMAG
56- 59 F4.2 mag B-V Integrated B-V colour index
61- 64 F4.2 mag V-I Integrated V-I colour index
66- 70 F5.3 mag E(B-V) ?=- Internal reddening
72- 80 E9.4 10-7W L(Ha) ?=- Halpha luminosity
82- 85 F4.2 % e_L(Ha) ?=- Percentage error on L(Ha)
87- 89 F3.1 [0.1nm] logEW Hα+[NII] equivalent width (1)
91- 95 F5.2 Myr Age Estimated Age
97-100 F4.2 Myr e_Age rms uncertainty on Age
102 A1 --- n_SFR(Ha) [*] *: SFR(Q(H0)) instead of SFR(Ha)
103-110 F8.5 solMass/yr SFR(Ha) Stellar Formation Rate from Ha
112-118 F7.5 solMass/yr e_SFR(Ha) rms uncertainty on SFR(Ha)
119 A1 --- n_Mass [*] *: Mass determined with BMAG
120-123 E4.1 solMass Mass Estimated mass
125-128 E4.1 solMass e_Mass ?=- rms uncertainty on Mass
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Note (1): Typical error of ±0.1Å.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 30-Jun-2008