J/A+A/700/A56 EXtended-UV galaxies surface brightness (Bernaud+, 2025)
Characterizing the outer disk of eXtended-UV galaxies in the optical domain with
deep surveys.
Bernaud E., Boissier S., Junais, Malek K., Hugot E., Galaz G.
<Astron. Astrophys. 700, A56 (2025)>
=2025A&A...700A..56B 2025A&A...700A..56B (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Photometry ; Optical ; Ultraviolet
Keywords: galaxies: evolution - galaxies: general - galaxies: structure
Abstract:
Extended-UV (XUV) galaxies are galaxies presenting an extended outer
ultraviolet disks. Although some Giant Low Surface Brightness (GLSB)
galaxies are also XUV, their relation has been seldom studied. This
work aims to determine whether a sample of nine XUV galaxies can be
classified as GLSBs, by analyzing their photometric properties in deep
optical images.
The method presented here uses optical data from the Dark Energy
Survey (DES) to construct surface brightness (SB) profiles for each
galaxy. A characteristic UV radius is defined to examine the XUV
disks. The surface brightness profiles are fitted using simple
exponential functions, and the extracted parameters are compared with
the literature to identify possible GLSB galaxies. We examined also
other diagnostics, including color profiles.
The analysis of the optical surface brightness profiles of XUV
galaxies reveal that they can be classified into three different
families. One third meet the GLSB criteria in terms of diffuseness,
another third are regular, and the remaining have a stronger decline
in the outer disk than in the inner disk, opposite to GLSBs. The color
profiles allowed us, in addition to distinguish one of the galaxy,
NGC1140, likely resulting from a rare dwarf-dwarf merger.
Description:
Surface brightness profiles for the all sample in grizY bands of DES
and FUV and NUV from GALEX corresponding to the figure 2 of the paper.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 67 9 Properties of the sample
tablea1.dat 141 1274 Surface brightness profiles for the all sample
in grizY bands of DES and FUV and NUV from GALEX
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Name Galaxy name
9- 18 F10.6 deg RAdeg Right ascension (J2000)
20- 29 F10.6 deg DEdeg Declination (J2000)
31- 33 I3 arcsec R25 Semimajor axis of the isophote 25mag/arcsec2
35- 38 F4.1 Mpc Dist Distance
40- 45 F6.4 mag E(B-V) Reddening
47 A1 --- Type1 [Y/N] XUV type 1 ?
49 A1 --- Type2 [Y/N] XUV type 2 ?
51- 55 F5.2 [Msun] logMHI HI mass
57- 60 A4 --- MType Morphological type
62- 67 F6.4 kpc/arcsec Scale Scale
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Name Galaxy name
9- 15 F7.2 arcsec amaj Semi-major axis of ellipse (sma)
17- 21 F5.2 mag/arcsec2 SuBrg Surface brigthness in g band
23- 27 F5.2 mag/arcsec2 E_SuBrg Upper error on surface brigthness in g band
29- 33 F5.2 mag/arcsec2 e_SuBrg Lower error on surface brigthness in g band
35- 39 F5.2 mag/arcsec2 SuBrr Surface brigthness in r band
41- 45 F5.2 mag/arcsec2 E_SuBrr Upper error on surface brigthness in r band
47- 51 F5.2 mag/arcsec2 e_SuBrr Lower error on surface brigthness in r band
53- 57 F5.2 mag/arcsec2 SuBri Surface brigthness in i band
59- 63 F5.2 mag/arcsec2 E_SuBri Upper error on surface brigthness in i band
65- 69 F5.2 mag/arcsec2 e_SuBri Lower error on surface brigthness in i band
71- 75 F5.2 mag/arcsec2 SuBrz Surface brigthness in z band
77- 81 F5.2 mag/arcsec2 E_SuBrz Upper error on surface brigthness in z band
83- 87 F5.2 mag/arcsec2 e_SuBrz Lower error on surface brigthness in z band
89- 93 F5.2 mag/arcsec2 SuBrY Surface brigthness in Y band
95- 99 F5.2 mag/arcsec2 E_SuBrY Upper error on surface brigthness in Y band
101-105 F5.2 mag/arcsec2 e_SuBrY Lower error on surface brigthness in Y band
107-111 F5.2 mag/arcsec2 SuBrFUV Surface brigthness in FUV band
113-117 F5.2 mag/arcsec2 E_SuBrFUV Upper error on surface brigthness
in FUV band
119-123 F5.2 mag/arcsec2 e_SuBrFUV Lower error on surface brigthness
in FUV band
125-129 F5.2 mag/arcsec2 SuBrNUV Surface brigthness in NUV band
131-135 F5.2 mag/arcsec2 E_SuBrNUV Upper error on surface brigthness
in NUV band
137-141 F5.2 mag/arcsec2 e_SuBrNUV Lower error on surface brigthness
in NUV band
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Acknowledgements:
Eloise Bernaud, eloise.bernaud(at)lam.fr
(End) Patricia Vannier [CDS] 18-Jun-2025