The Arecibo Galaxy Environment Survey - X. The structure of halo gas around M33
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F16%3A00471859" target="_blank" >RIV/67985815:_____/16:00471859 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1093/mnras/stv2684" target="_blank" >http://dx.doi.org/10.1093/mnras/stv2684</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/stv2684" target="_blank" >10.1093/mnras/stv2684</a>
Alternative languages
Result language
angličtina
Original language name
The Arecibo Galaxy Environment Survey - X. The structure of halo gas around M33
Original language description
As part of the HI Arecibo Galaxy Environment Survey (AGES), we have observed 5 x 4 deg of sky centred on M33, reaching a limiting column density of similar to 1.5 x 10(17) cm(-2) (line width of 10 km s(-1) and resolution 3.5 arcmin). We particularly investigate the absence of optically detected dwarf galaxies around M33, something that is contrary to galaxy formation models. We identify 22 discrete HI clouds, 11 of which are new detections. The number of objects detected and their internal velocity dispersion distribution is consistent with expectations from standard galaxy formation models. However, the issue remains open as to whether the observed velocity dispersions can be used as a measure of the HI clouds total mass, i.e. are the velocities indicative of virialized structures or have they been influenced by tidal interactions with other structures in the Local Group? We identify one particularly interesting H I cloud, AGESM33-31, that has many of the characteristics of HI distributed in the disc of a galaxy, yet there is no known optical counterpart associated with it. This object has a total H I mass of 1.22 x 10(7) M-circle dot and a diameter of 18 kpc if at the distance of M33 (D-M33 = 840 kpc). However, we also find that there are numerous other HI clouds in this region of sky that have very similar velocities and so it is plausible that all these clouds are actually associated with debris from the Magellanic stream.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BN - Astronomy and celestial mechanics, astrophysics
OECD FORD branch
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Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Monthly Notices of the Royal Astronomical Society
ISSN
0035-8711
e-ISSN
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Volume of the periodical
456
Issue of the periodical within the volume
1
Country of publishing house
GB - UNITED KINGDOM
Number of pages
10
Pages from-to
951-960
UT code for WoS article
000368010000105
EID of the result in the Scopus database
2-s2.0-84959552521