J/A+A/558/A18 HI spectra of extremely metal-poor (XMP) galaxies (Filho+, 2013)
Extremely metal-poor galaxies: The HI content.
Filho M.E., Winkel B., Sanchez Almeida J., Aguerri J.A., Amorin R.,
Ascasibar Y., Elmegreen B.G., Elmegreen D.M., Gomes J.M., Humphrey A.,
Lagos P., Morales-Luis A.B., Munoz-Tunon C., Papaderos P., Vilchez J.M.
<Astron. Astrophys. 558, A18 (2013)>
=2013A&A...558A..18F 2013A&A...558A..18F
ADC_Keywords: Galaxies, radio ; Galaxies, spectra ; H I data
Keywords: galaxies: fundamental parameters - radio lines: galaxies -
techniques: spectroscopic
Abstract:
Extremely metal-poor (XMP) galaxies are chemically, and possibly
dynamically, primordial objects in the local Universe.
Our objective is to characterize the HI content of the XMP galaxies as
a class, using as a reference the list of 140 known local XMPs
compiled by Morales-Luis et al. (2011, Cat. J/ApJ/743/77).
We have observed 29 XMPs, which had not been observed before at 21 cm,
using the Effelsberg radio telescope. This information was
complemented with Hi data published in literature for a further 53
XMPs. In addition, optical data from the literature provided
morphologies, stellar masses, star-formation rates and metallicities.
Description:
The HI spectra, in FITS format, of the XMP galaxies observed with
Effelsberg.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 92 80 Compilation of the HI data from literature for
54 XMP galaxies in the local Universe
table2.dat 110 29 HI parameters from our new Effelsberg observations
for 29 XMP galaxies in the local Universe
sp/* . 29 Individual FITS spectra
table3.dat 75 140 The optical data for the 140 XMP galaxies in the
local Universe
refs.dat 140 26 References
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See also:
J/ApJ/743/77 : SDSS extremely metal-poor (XMP) galaxies (Morales-Luis+, 2011)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Name Source name
16- 17 I2 h RAh Right ascension (J2000)
19- 20 I2 min RAm Right ascension (J2000)
22- 23 I2 s RAs Right ascension (J2000)
25 A1 --- DE- Declination sign (J2000)
26- 27 I2 deg DEd Declination (J2000)
29- 30 I2 arcmin DEm Declination (J2000)
32- 33 I2 arcsec DEs Declination (J2000)
35 A1 --- l_SHI Limit flag on SHI (upper limit)
36- 41 F6.2 Jy.km/s SHI HI integrated flux density (1)
43- 47 F5.2 Jy.km/s e_SHI ? rms uncertainty on SHI
49- 55 F7.2 km/s Vsys ?=- HI systemic heliocentric or local
group-corrected (*) radial velocity
(optical convention)
57- 61 F5.2 km/s e_Vsys ? rms uncertainty on Vsys
62 A1 --- n_Vsys [*] *: local group-corrected radial velocity
in Vsys
63- 67 F5.1 km/s W50 ?=- HI line width at 50% of peak flux density
69- 72 F4.1 km/s e_W50 ? rms uncertainty on W50
74- 76 F3.1 arcmin dHI ?=- HI diameter at a column density of
∼1019atoms/cm2
77 A1 --- n_dHI [a] a: quoted value is for the major axis
diameter only
79- 88 A10 --- Tel Telescope or survey
90- 92 A3 --- Ref References, in refs.dat file
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Note (1): Data from references (a) are corrected for pointing, (b) are flux
density-corrected for beam resolution and (h) are self-absorption-corrected
line flux densities.
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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- 14 A14 --- Name Source name
15 A1 --- n_Name [ab] Individual note (1)
17- 18 I2 h RAh Right ascension (J2000)
20- 21 I2 min RAm Right ascension (J2000)
23- 28 F6.3 s RAs Right ascension (J2000)
30 A1 --- DE- Declination sign (J2000)
31- 32 I2 deg DEd Declination (J2000)
34- 35 I2 arcmin DEm Declination (J2000)
37- 41 F5.2 arcsec DEs Declination (J2000)
43- 44 I2 min t Effective integration time on-source
46- 52 F7.2 km/s Vlsr ?=- Systemic local standard-of-rest radial
velocity (radio convention)
54- 59 F6.2 km/s W50 ?=- HI line width at 50% of the peak flux
density
61- 64 F4.1 Jy.km/s SHI ?=- HI integrated flux density
66- 68 F3.1 Jy.km/s e_SHI 5σ error in integrated flux density
70- 78 A9 --- Det Detection level (2)
80- 85 A6 --- Profile Profile of the HI line (3)
87-110 A24 --- FileName Name of the FITS spectrum un subdirectory sp
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Note (1): Notes as follows:
a = The HI line is dominated by the HI gas in the nearby spiral galaxy
UGC 139 (Sect. 2.2.2)
b = Baseline problems
Note (2): Detection flag is:
yes = detections are ≫ 5σ
no = non-detections are ≪ 5σ
marginal = detections are > 5σ
uncertain = detections are ∼ 5σ
Note (3): Profile flag as follows:
s = single-peaked
d = double-peaked
sym = symmetric
asym = asymmetric
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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- 14 A14 --- Name Source name
15 A1 --- n_Name [a] Individual note (1)
17- 18 I2 h RAh Right ascension (J2000)
20- 21 I2 min RAm Right ascension (J2000)
23- 24 I2 s RAs Right ascension (J2000)
26 A1 --- DE- Declination sign (J2000)
27- 28 I2 deg DEd Declination (J2000)
30- 31 I2 arcmin DEm Declination (J2000)
33- 34 I2 arcsec DEs Declination (J2000)
36- 39 F4.1 mag gmag ?=- SDSS g-band Petrosian magnitude, from
Morales-Luis et al., 2011, Cat. J/ApJ/743/77
41- 46 F6.2 arcsec ropt ?=- Optical radius containing 90% of the
g-band galaxy light, from the SDSS
47 A1 --- n_ropt [*+] NED SDSS r-band Petrosian radius (*) or
average source size at isophote
25mag/arcsec2 (+) is used
49- 52 F4.2 --- sini ?=- Inclination angle of the source from the
SDSS g-band data
53 A1 --- n_sini [*+] NED SDSS r-band Petrosian data (*) or
estimated from the NED source size (+)
55- 58 F4.2 [-] m(O/H) Metallicity, 12+log(O/H), from Morales-Luis
et al. (2011, J/ApJ/743/77) (2)
59 A1 --- n_m(O/H) [d] d for strong-line method
61- 70 A10 --- Morph SDSS optical morphology adapted from
Morales-Luis et al. (2011, J/ApJ/743/77) (3)
71 A1 --- n_Morph [*] * if Morph obtained from SDSS DR9 images
73- 75 F3.1 --- Offset ?=- Spatial offset (4)
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Note (1): a: Although this source has been selected as an XMP galaxy in
Morales-Luis et al. (2011, Cat. J/ApJ/743/77), NED has flagged this as a
Western HII region of UGC 139 (Sect. 3.2.2).
Note (2): Tabulated values are based on the direct method or strong-line method
(d; see Morales-Luis et al. (2011, Cat. J/ApJ/743/77) for details).
Note (3): Optical morphology is one of:
symmetric = spherical, elliptical or disk-like symmetric structure
two-knot = two-knot structure
multi-knot = multiple knot structure
cometary = head-tail structure
Note (4): Spatial offset, ΔR/d, where R is the difference between the
position of the brightest star-formation region and the position of the
center of the galaxy and r is the radius of the outer isophote.
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1 A1 --- Ref Referenc code
3- 80 A78 --- Inst Instrument or survey designation
82-100 A19 --- BibCode BibCode
102-121 A20 --- Aut Author's name
122-140 A19 --- Com Comments
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Acknowledgements:
Mercedes E. Filho, mfilho(at)astro.up.pt
Centro de Astrofisica da Universidade do Porto, Portugal
(End) Mercedes Filho [CAUP, Portugal], Patricia Vannier [CDS] 20-Sep-2013