The Arecibo Galaxy Environment Survey. XII. Optically Dark HI Clouds in the Leo I Group
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F22%3A00565100" target="_blank" >RIV/67985815:_____/22:00565100 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0338032" target="_blank" >https://hdl.handle.net/11104/0338032</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/1538-3881/ac96e8" target="_blank" >10.3847/1538-3881/ac96e8</a>
Alternative languages
Result language
angličtina
Original language name
The Arecibo Galaxy Environment Survey. XII. Optically Dark HI Clouds in the Leo I Group
Original language description
Using data from the Arecibo Galaxy Environment Survey, we report the discovery of five H I clouds in the Leo I group without detected optical counterparts. Three of the clouds are found midway between M96 and M95, one is only 10' from the southeast side of the well-known Leo Ring, and the fifth is relatively isolated. H I masses range from 2.6 x 10(6) M-circle dot to 9.0 x 10(6) M-circle dot, and velocity widths (W50) range from 16 to 42 km s(-1). Although a tidal origin is the most obvious explanation, this formation mechanism faces several challenges. For the most isolated cloud, the difficulties are its distance from neighboring galaxies and the lack of any signs of disturbance in the H I disks of those systems. Some of the clouds also appear to follow the baryonic Tully-Fisher relation between mass and velocity width for normal, stable galaxies, which is not expected if they are tidal in origin. Three clouds are found between M96 and M95 that have no optical counterparts but have otherwise similar properties and locations to the optically detected galaxy LeG 13. While overall we favor a tidal debris scenario to explain the clouds, we cannot rule out a primordial origin. If the clouds were produced in the same event that gave rise to the Leo Ring, they may provide important constraints on any model attempting to explain that structure.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
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
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astronomical Journal
ISSN
0004-6256
e-ISSN
1538-3881
Volume of the periodical
164
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
17
Pages from-to
233
UT code for WoS article
000877865300001
EID of the result in the Scopus database
2-s2.0-85141944909