Research output: Contribution to journal › Article
Molecular content of polar-ring galaxies. / Combes, F.; Moiseev, A.; Reshetnikov, V.
In: Astronomy and Astrophysics, Vol. 554, No. A11, 2013.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Molecular content of polar-ring galaxies
AU - Combes, F.
AU - Moiseev, A.
AU - Reshetnikov, V.
PY - 2013
Y1 - 2013
N2 - We have searched for CO lines in a sample of 21 new morphologically determined polar-ring galaxies (of which nine are kinematically confirmed), obtained from a wide search in the Galaxy Zoo project by Moiseev and collaborators. Polar-ring galaxies (PRGs) are a unique class of objects, tracing special episodes in the galaxy mass assembly: they can be formed through galaxy interaction and merging, but also through accretion from cosmic filaments. Furthermore, they enable the study of dark matter haloes in three dimensions. The polar ring itself is a sub-system rich in gas, where molecular gas is expected, and new stars are formed. Among the sample of 21 PRGs, we have detected five CO-rich systems, that can now be followed up with higher spatial resolution. Their average molecular mass is 9.4 × 10^9 M⊙, and their average gas fraction is 27% of their baryonic mass, with a range from 15 to 43%, implying that they have just accreted a large amount of gas. The position of the detected objects in the velocity-magnitu
AB - We have searched for CO lines in a sample of 21 new morphologically determined polar-ring galaxies (of which nine are kinematically confirmed), obtained from a wide search in the Galaxy Zoo project by Moiseev and collaborators. Polar-ring galaxies (PRGs) are a unique class of objects, tracing special episodes in the galaxy mass assembly: they can be formed through galaxy interaction and merging, but also through accretion from cosmic filaments. Furthermore, they enable the study of dark matter haloes in three dimensions. The polar ring itself is a sub-system rich in gas, where molecular gas is expected, and new stars are formed. Among the sample of 21 PRGs, we have detected five CO-rich systems, that can now be followed up with higher spatial resolution. Their average molecular mass is 9.4 × 10^9 M⊙, and their average gas fraction is 27% of their baryonic mass, with a range from 15 to 43%, implying that they have just accreted a large amount of gas. The position of the detected objects in the velocity-magnitu
KW - galaxies: evolution
KW - galaxies: general
KW - galaxies: halos
KW - galaxies: ISM
KW - radio lines: galaxies
U2 - 10.1051/0004-6361/201321385
DO - 10.1051/0004-6361/201321385
M3 - Article
VL - 554
JO - ASTRONOMY & ASTROPHYSICS
JF - ASTRONOMY & ASTROPHYSICS
SN - 0004-6361
IS - A11
ER -
ID: 7375563