2011A&A...528A..46F

Query : 2011A&A...528A..46F

2011A&A...528A..46F - Astronomy and Astrophysics, volume 528A46-46 (2011/4-1)

Constraining the ages of the fireballs in the wake of the dIrr galaxy VCC 1217/IC 3418.

FUMAGALLI M., GAVAZZI G., SCARAMELLA R. and FRANZETTI P.

Abstract (from CDS):

A complex of Hα emitting blobs with strong FUV excess is associated to the dIrr galaxy VCC 1217/IC 3418 (Hester et al. 2010ApJ...716L..14H), and extends up to 17Kpc in the southeast direction. These outstanding features can be morphologically divided into diffuse filaments and compact knots, where most of the star formation activity traced by Hα takes place. We investigate the properties of the galaxy and the blobs using a multiwavelength approach to constrain their origin. We collected publicly available data in UV and Hα and observed the scene in the optical U,g,r,i bands with LBT. The photometric data allows evaluation of the star formation rate and performance of a SED fitting separately for the galaxy and the blobs in order to constrain their stellar population age. Moreover we analyzed the color and luminosity profile of the galaxy and its spectrum to investigate its recent interaction with the Virgo cluster. Our analysis confirms that the most plausible mechanism for the formation of the blobs is ram pressure stripping by the Virgo cluster IGM. The galaxy colors, luminosity profile and SED are consistent with a sudden gas depletion in the last few hundred Myr. The SED fitting of the blobs constrains their ages in <400Myr.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: individual: VCC1217/IC3418 - galaxies: evolution - galaxies: irregular

Nomenclature: Figs 1-2, Table 2: [FGS2011] AN (Nos K1-K8, F1-F4).

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 17

goto Full paper

goto View the references in ADS

Number of rows : 17
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ACO 426 ClG 03 19 47.6 +41 30 54           ~ 2508 1
2 NAME Coma Supercluster SCG 11 23 +23.9           ~ 291 0
3 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 1127 1
4 SDSS J122942.96+104525.0 Sy2 12 29 42.9615849624 +10 45 24.913701540           ~ 88 0
5 IC 3418 LIN 12 29 43.919 +11 24 16.87   16.5       ~ 127 1
6 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
7 NAME Virgo A Cluster GrG 12 30 49.2 +12 23 30           ~ 154 0
8 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
9 NGC 4522 GiG 12 33 39.657 +09 10 29.54   13.6       ~ 396 0
10 LEDA 126817 GiC 12 58 42.589 +27 45 37.78     16.30 16.15   ~ 54 0
11 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
12 GMP 3016 GiC 13 00 01.03440 +28 04 54.7752 18.78   17.69 17.55   ~ 18 0
13 NAME Shapley Supercluster SCG 13 06.0 -33 04           ~ 677 0
14 [GH91] 21 GiC 13 11 24.86 -01 20 39.9           ~ 5 0
15 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1178 0
16 ACO 2667 ClG 23 51 39.37 -26 05 02.7           ~ 190 0
17 2dFGRS TGS132Z144 G 23 51 44.03 -26 03 59.6   18.642   18.551   ~ 7 0

To bookmark this query, right click on this link: simbad:objects in 2011A&A...528A..46F and select 'bookmark this link' or equivalent in the popup menu