==========================================================================
J/A+A/612/A26 Deep HI observations of Leo T with WSRT (Adams+, 2018)
The following files can be converted to FITS (extension .fit or fit.gz)
list.dat
==========================================================================
Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/A+A/612/A26
==========================================================================
drwxr-xr-x 29 cats archive 4096 Aug 20 2019 [Up]
drwxr-xr-x 4 cats archive 287 Jan 12 2023 [TAR file]
-rw-r--r-- 1 cats archive 461 Dec 19 2022 .message
-r--r--r-- 1 cats archive 5007 Apr 13 2018 ReadMe
-rw-r--r-- 1 cats archive 242 Apr 13 2018 +footg5.gif
-rw-r--r-- 1 cats archive 2115 Apr 13 2018 +footg8.gif
drwxr-xr-x 2 cats archive 113 Dec 18 2017 fits
-r--r--r-- 1 cats archive 559 Dec 18 2017 list.dat [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe :J/A+A/612/A26 Deep HI observations of Leo T with WSRT (Adams+, 2018)
================================================================================
Deep neutral hydrogen observations of Leo T with the Westerbork Synthesis
Radio Telescope.
Adams E.A.K, Oosterloo T.A
<Astron. Astrophys. 612, A26 (2018)>
=2018A&A...612A..26A (SIMBAD/NED BibCode)
================================================================================
ADC_Keywords: Clusters, galaxy ; Galaxies, photometry ; Photometry, CCD ;
H I data
Keywords: galaxies: ISM - galaxies: dwarf - Local Group -
radio lines: galaxies - galaxies: individual: Leo T -
galaxies: star formation
Abstract:
Leo T is the lowest mass gas-rich galaxy currently known and studies
of its gas content help us understand how such marginal galaxies
survive and form stars. We present deep neutral hydrogen (HI)
observations from the Westerbork Synthesis Radio Telescope in order to
understand its HI distribution and potential for star formation.
We find a larger HI line flux than the previously accepted value,
resulting in a 50% larger HI mass of 4.1x10^5^M_sun_.
The additional HI flux is from low surface brightness emission that
was previously missed; with careful masking this emission can be
recovered even in shallower data.We perform a Gaussian spectral
decomposition to find a cool neutral medium component (CNM) with a
mass of 3.7x10^4^M_sun_, or almost 10% of the total HI mass.
Leo T has no HI emission extending from the main HI body, but there is
evidence of interaction with the Milky Way circumgalactic medium in
both a potential truncation of the HI body and the offset of the peak
HI distribution from the optical center. The CNM component of Leo T is
large when compared to other dwarf galaxies, even though Leo T is not
currently forming stars and has a lower star formation efficiency than
other gas-rich dwarf galaxies.
However, the HI column density associated with the CNM component in
Leo T is low. One possible explanation is the large CNM component is
not related to star formation potential but rather a recent, transient
phenomenon related to the interaction of Leo T with the Milky Way
circumgalactic medium.
Description:
The final cleaned data cube for ten 12-hr WSRT tracks combined is
presented, along with a total intensity, primary-beam corrected HI map
(in units of 10^20^atoms/cm^2^) and moment one (velocity field) and
moment two (velocity dispersion) maps, both in units of km/s.
Objects:
--------------------------------------------------
RA (2000) DE Designation(s)
--------------------------------------------------
09 34 53.4 +17 03 05 Leo T = NAME Leo T dSph
--------------------------------------------------