J/A+A/659/A14 HI observations of the MATLAS dwarfs (Poulain+, 2022)
HI observations of the MATLAS dwarf and ultra-diffuse galaxies.
Poulain M., Marleau F., Habas R., Duc P.A., Sanchez-Janssen R.,
Durrell P.R., Paudel S., Mueller O., Lim S., Bilek M., Fensch J.
<Astron. Astrophys. 659, A14 (2022)>
=2022A&A...659A..14P 2022A&A...659A..14P (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, radio ; Galaxies, optical ; Galaxy catalogs ;
Galaxies, nearby ; Galaxies, photometry
Keywords: galaxies: dwarf - radio lines: galaxies - galaxies: structure
Abstract:
The presence of HI gas in galaxies is inextricably linked to their
morphology and evolution. This paper aims to understand the HI content
of the already identified 2210 dwarfs located in the low-to-moderate
density environments of the MATLAS deep imaging survey. We combine the
HI observations from the ATLAS3D survey, with the extragalactic HI
sources from the ALFALFA survey, to extract the HI line width,
velocity and mass of the MATLAS dwarfs. From the 1773 dwarfs in our
sample with available HI observations, 8% (145) have an HI line
detection. The majority of the dwarfs show irregular morphology, while
29% (42) are ellipticals, the largest sample of HI-bearing dwarf
ellipticals (dEs) to date. Of the HI dwarf sample, 2% (3) are
ultra-diffuse galaxies (UDGs), 12% have a transition-type morphology,
5% are tidal dwarf candidates, and 10% appear to be disrupted objects.
In our optically selected sample, 9.5% of the dEs, 7% of the UDGs and
10% of the classical dwarfs are HI-bearing. The HI-bearing dwarfs have
on average bluer colors than the dwarfs without detected HI. We find
relations between the stellar and HI masses, gas fraction, color and
absolute magnitude consistent with previous studies of dwarfs probing
similar masses and environments. For 79% of the dwarfs identified as
satellites of massive early-type galaxies, we find that the HI mass
increases with the projected distance to the host. Using the HI line
width, we estimate dynamical masses and find that 5% (7) of the dwarfs
are dark matter deficient.
Description:
This work is based on the HI data from the ATLAS3D HI Survey
performed with the Westerbork Synthesis radio telescope and on the
extragalactic HI sources catalog from the Arecibo Legacy Fast ALFA
(ALFALFA) survey (2018ApJ...861...49H 2018ApJ...861...49H). We also make use of data in
the g, r and i-bands from the MATLAS survey (Duc et al.,
2015MNRAS.446..120D 2015MNRAS.446..120D, Cat. J/MNRAS/446/120) performed with the
Canada-France-Hawaii telescope. This catalog presents the HI and
photometric properties of 145 dwarfs galaxies with an HI line
detection.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 140 145 HI and optical properties of the HI-bearing dwarfs
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See also:
J/MNRAS/446/120 : ATLAS3D project. XXIX (Duc+, 2015)
J/MNRAS/506/5494 : MATLAS dwarfs structure and morphology (Poulain+, 2021)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- ID Dwarf ID, MATLAS-NNNN
13- 20 F8.4 deg RAdeg Right ascension (J2000)
22- 28 F7.4 deg DEdeg Declination (J2000)
30- 33 I4 km/s HV Heliocentric velocity
35- 36 I2 km/s e_HV Error on the heliocentric velocity
38- 42 F5.2 Mpc DHI Estimate distance from Hubble flow
44- 47 F4.2 Mpc e_DHI Error on the estimated distance
49- 51 I3 km/s W50 W50 line width
53- 56 F4.2 Jy.km/s FHI HI flux
58- 61 F4.2 Jy.km/s e_FHI Error on the HI flux
63- 66 F4.1 --- S/N Signal-to-noise ratio of the HI line
68- 71 F4.2 [Msun] logMHI log10 of the HI mass
73- 76 F4.2 [Msun] e_logMHI Error on the log10 of the HI mass
78- 83 F6.2 mag gMAG Absolute magnitude in g-band
85- 90 F6.2 mag BMAG ? Absolute magnitude in B-band
92- 96 F5.2 mag g-r ? g-r color corrected for Galactic
extinction
98-101 F4.2 [Msun] logMstar ? log10 of the stellar mass
103-106 F4.2 [Msun] e_logMstar ? Error on the log10 of the stellar mass
108-112 F5.2 --- MHI/LB ? HI-mass-to-light ratio
114-118 F5.2 [Msun] logMdyn log10 of the dynamical mass
120-127 A8 --- Survey Survey (1)
129-140 A12 --- Morph Morphology of the dwarf (2)
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Note (1): ATLAS3D* means that the dwarf has also been detected in the ALFALFA
survey.
Note (2): Based on Poulain et al. (2021MNRAS.506.5494P 2021MNRAS.506.5494P, cat. J/MNRAS/506/5494)
for the dEs, dIs, and nucleated (indicated with ",N"), and on
Marleau et al. (2021A&A...654A.105M 2021A&A...654A.105M, Cat. J/A+A/654/A105) for the UDGs.
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Acknowledgements:
Melina Poulain, melina.poulain45(at)gmail.com
(End) Patricia Vannier [CDS] 07-Dec-2021