2016A&A...596A..11B


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.11CEST19:35:32

2016A&A...596A..11B - Astronomy and Astrophysics, volume 596A, 11-11 (2016/12-1)

Quenching of the star formation activity in cluster galaxies.

BOSELLI A., ROEHLLY Y., FOSSATI M., BUAT V., BOISSIER S., BOQUIEN M., BURGARELLA D., CIESLA L., GAVAZZI G. and SERRA P.

Abstract (from CDS):

We study the star formation quenching mechanism in cluster galaxies by fitting the spectral energy distribution (SED) of the Herschel Reference Survey, a complete volume-limited K-band-selected sample of nearby galaxies including objects in different density regions, from the core of the Virgo cluster to the general field. The SEDs of the target galaxies were fitted using the CIGALE SED modelling code. The truncated activity of cluster galaxies was parametrised using a specific star formation history with two free parameters, the quenching age QA and the quenching factor QF. These two parameters are crucial for the identification of the quenching mechanism, which acts on long timescales when starvation processes are at work, but is rapid and efficient when ram pressure occurs. To be sensitive to an abrupt and recent variation of the star formation activity, we combined twenty photometric bands in the UV to far-infrared in a new way with three age-sensitive Balmer line absorption indices extracted from available medium-resolution (R∼1000) integrated spectroscopy and with Hα narrow-band imaging data. The use of a truncated star formation history significantly increases the quality of the fit in HI-deficient galaxies of the sample, that is to say, in those objects whose atomic gas content has been removed during the interaction with the hostile cluster environment. The typical quenching age of the perturbed late-type galaxies is QA≲300Myr whenever the activity of star formation is reduced by 50%<QF≲80% and QA≲500Myr for QF>80%, while that of the quiescent early-type objects is QA~=1-3Gyr. The fraction of late-type galaxies with a star formation activity reduced by QF>80% and with an HI-deficiency parameter HI-def>0.4 drops by a factor of ∼5 from the inner half virial radius of the Virgo cluster (R/Rvir<0.5), where the hot diffuse X-ray emitting gas of the cluster is located, to the outer regions (R/Rvir>4). The efficient quenching of the star formation activity observed in Virgo suggests that the dominant stripping process is ram pressure. We discuss the implication of this result in the cosmological context of galaxy evolution.

Abstract Copyright: © ESO, 2016

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual: Virgo - galaxies: evolution - galaxies: interactions - galaxies: ISM - galaxies: star formation

Simbad objects: 18

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Number of rows : 18

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 994 1
2 M 99 H2G 12 18 49.625 +14 24 59.36 10.45 10.44 9.87     ~ 763 2
3 NGC 4330 GiG 12 23 17.249 +11 22 04.73   14.0       ~ 187 0
4 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1635 2
5 NGC 4388 Sy2 12 25 46.820 +12 39 43.45 11.91 11.76 11.02     ~ 1184 2
6 NGC 4402 GiP 12 26 07.566 +13 06 46.06   12.55       ~ 356 1
7 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5825 0
8 NGC 4419 LIN 12 26 56.433 +15 02 50.72 12.42 12.08 11.16     ~ 368 1
9 NGC 4424 H2G 12 27 11.5747046042 +09 25 14.319813630   13.1       ~ 286 0
10 NGC 4438 LIN 12 27 45.652 +13 00 30.92 11.37 11.02 10.17     ~ 579 3
11 IC 3392 GiG 12 28 43.2764404602 +14 59 57.958845737   13.3       ~ 143 0
12 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6213 3
13 M 88 Sy2 12 31 59.216 +14 25 13.48   14.33 13.18     ~ 728 1
14 NGC 4522 GiG 12 33 39.657 +09 10 29.54   13.6       ~ 328 0
15 M 90 Sy2 12 36 49.816 +13 09 46.33 10.56 10.26 9.54     ~ 795 1
16 NGC 4580 LIN 12 37 48.3753911323 +05 22 06.630673011   13.1       ~ 193 0
17 NGC 4654 GiP 12 43 56.638 +13 07 34.86   11.8       ~ 502 1
18 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4208 2

    Equat.    Gal    SGal    Ecl

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2020.07.11-19:35:33

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