Abstract
We report the discovery of two peculiar galaxies infalling into the lensing clusters of galaxies Abell 1689 (z∼ 0.18) and 2667 (z∼ 0.23). Hubble Space Telescope images show extraordinary trails composed by blue bright knots and stellar streams associated with both these systems, an ∼L* and ∼0.1L* galaxy. Under the combined action of tidal interaction with the cluster potential and of ram pressure by the intra-cluster medium the morphologies and star formation histories of these two galaxies are strongly perturbed. While in the massive system tidal interactions are the dominant effect and are able to produce a sinking of gas towards the galaxy center triggering a strong burst of star formation and changing galaxy's morphology, in the smaller galaxy the effects of gravitation are reduced by ram pressure stripping which blows away the neutral hydrogen from the galactic disk, quenching the star formation activity and transforming a gas rich late type spiral into quiescent disk dominated early type system. This result is a new additional evidence that galaxy mass represents the main driver of galaxy evolution, even during their dive into the harsh cluster environment and can give additional insights on the origin of S0s and dwarf cluster galaxies.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 198 |
| Number of pages | 1 |
| Journal | Proceedings of the International Astronomical Union |
| Volume | 2 |
| Issue number | S235 |
| DOIs | |
| State | Published - Aug 2006 |
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Keywords
- Galaxies:clusters:individual:(A1689,A2667)galaxies:evolutiongalaxies: interactions
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- Aerospace Engineering
Cite this
The strong transformation of spiral galaxies infalling into massive clusters at z∼ 0.2. / Cortese, L.; Marcillac, D.; Richard, J.; Bravo-Alfaro, H.; Kneib, J. P.; Rieke, George H.; Covone, G.; Egami, E.; Rigby, J.; Czoske, O.; Davies, J.
In: Proceedings of the International Astronomical Union, Vol. 2, No. S235, 08.2006, p. 198.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The strong transformation of spiral galaxies infalling into massive clusters at z∼ 0.2
AU - Cortese, L.
AU - Marcillac, D.
AU - Richard, J.
AU - Bravo-Alfaro, H.
AU - Kneib, J. P.
AU - Rieke, George H.
AU - Covone, G.
AU - Egami, E.
AU - Rigby, J.
AU - Czoske, O.
AU - Davies, J.
PY - 2006/8
Y1 - 2006/8
N2 - We report the discovery of two peculiar galaxies infalling into the lensing clusters of galaxies Abell 1689 (z∼ 0.18) and 2667 (z∼ 0.23). Hubble Space Telescope images show extraordinary trails composed by blue bright knots and stellar streams associated with both these systems, an ∼L* and ∼0.1L* galaxy. Under the combined action of tidal interaction with the cluster potential and of ram pressure by the intra-cluster medium the morphologies and star formation histories of these two galaxies are strongly perturbed. While in the massive system tidal interactions are the dominant effect and are able to produce a sinking of gas towards the galaxy center triggering a strong burst of star formation and changing galaxy's morphology, in the smaller galaxy the effects of gravitation are reduced by ram pressure stripping which blows away the neutral hydrogen from the galactic disk, quenching the star formation activity and transforming a gas rich late type spiral into quiescent disk dominated early type system. This result is a new additional evidence that galaxy mass represents the main driver of galaxy evolution, even during their dive into the harsh cluster environment and can give additional insights on the origin of S0s and dwarf cluster galaxies.
AB - We report the discovery of two peculiar galaxies infalling into the lensing clusters of galaxies Abell 1689 (z∼ 0.18) and 2667 (z∼ 0.23). Hubble Space Telescope images show extraordinary trails composed by blue bright knots and stellar streams associated with both these systems, an ∼L* and ∼0.1L* galaxy. Under the combined action of tidal interaction with the cluster potential and of ram pressure by the intra-cluster medium the morphologies and star formation histories of these two galaxies are strongly perturbed. While in the massive system tidal interactions are the dominant effect and are able to produce a sinking of gas towards the galaxy center triggering a strong burst of star formation and changing galaxy's morphology, in the smaller galaxy the effects of gravitation are reduced by ram pressure stripping which blows away the neutral hydrogen from the galactic disk, quenching the star formation activity and transforming a gas rich late type spiral into quiescent disk dominated early type system. This result is a new additional evidence that galaxy mass represents the main driver of galaxy evolution, even during their dive into the harsh cluster environment and can give additional insights on the origin of S0s and dwarf cluster galaxies.
KW - Galaxies:clusters:individual:(A1689,A2667)galaxies:evolutiongalaxies: interactions
UR - http://www.scopus.com/inward/record.url?scp=36948999647&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=36948999647&partnerID=8YFLogxK
U2 - 10.1017/S1743921306006041
DO - 10.1017/S1743921306006041
M3 - Article
AN - SCOPUS:36948999647
VL - 2
SP - 198
JO - Proceedings of the International Astronomical Union
JF - Proceedings of the International Astronomical Union
SN - 1743-9213
IS - S235
ER -