2004A&A...428..425L


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST21:01:06

2004A&A...428..425L - Astronomy and Astrophysics, volume 428, 425-444 (2004/12-3)

The tidally disturbed luminous compact blue galaxy Mkn 1087 and its surroundings.

LOPEZ-SANCHEZ A.R., ESTEBAN C. and RODRIGUEZ M.

Abstract (from CDS):

We present new broad-band optical and near-infrared CCD imaging together with deep optical intermediate-resolution spectroscopy of Mkn 1087 and its surrounding objects. We analyze the morphology and colors of the stellar populations of the brightest objects, some of them star-formation areas, as well as the kinematics, physical conditions and chemical composition of the ionized gas associated with them. Mkn 1087 does not host an Active Galactic Nucleus, but it could be a Luminous Compact Blue Galaxy. Although it was classified as a suspected Wolf-Rayet galaxy, we do not detect the spectral features of these sort of massive stars. Mkn 1087 shows morphological and kinematical features that can be explained assuming that it is in interaction with two nearby galaxies: the bright KPG 103a and a dwarf (MB~-18) star-forming companion. We argue that this dwarf companion is not a tidal object but an external galaxy because of its low metallicity [12+log(O/H)=8.24] with respect to the one derived for Mkn 1087 [12+log(O/H)=8.57] and its kinematics. Some of the non-stellar objects surrounding Mkn 1087 are connected by bridges of matter with the main body, host star-formation events and show similar abundances despite their different angular distances. These facts, together their kinematics, suggest that they are tidal dwarf galaxies formed from material stripped from Mkn 1087. A bright star-forming region at the south of Mkn 1087 (knot #7) does not show indications of being a tidal galaxy or the product of a merging process as suggested in previous works. We argue that Mkn 1087 and its surroundings should be considered a group of galaxies.

Abstract Copyright:

Journal keyword(s): galaxies: starburst - galaxies: interactions - galaxies: abundances - Galaxy: kinematics and dynamics - galaxies: clusters: individual: Mkn 1087

Nomenclature: Fig.1, Table 2: [ME2000] Mrk 1087 NN (Nos 13-15) added. Text: [LER2004] JHHMMSS+DDMMSS N=1. Table 2: [LER2004] Mrk 1087 W (No. N), [LER2004] KPG 103a KN (Nos K1-K3). Table 8: [LER2004] bg N (Nos 1-8), [LER2004] cl N (Nos 1-6).

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

Simbad objects: 16

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Number of rows : 16

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 ClG J0449+0321 ClG 04 49 35 +03 21.1           ~ 1 0
2 2MASX J04493799+0319296 GiP 04 49 38.0029745535 +03 19 29.866677314   16.27 15.48     ~ 15 1
3 Mrk 1087 AGN 04 49 44.469 +03 20 02.67   15.49 15.04     ~ 75 1
4 HCG 31 CGG 05 01 37 -04 15.4           ~ 123 0
5 BD+52 913 WD* 05 05 30.6182785658 +52 49 51.920797126 10.25 11.44 11.69 11.93 12.108 DA.8 983 0
6 HD 289002 * 06 45 13.3726265810 +02 08 14.688016523 10.06 10.62 10.44     B1 226 0
7 Feige 34 HS* 10 39 36.7377085527 +43 06 09.209752646 9.613 10.91 11.14 11.319 11.464 sdOp 604 0
8 HCG 54 CGG 11 29 15 +20 34.7           ~ 49 0
9 HD 105183 HS* 12 06 47.2351675221 +11 40 12.658737086   10.93 11.06     sdB8IIIHe2 104 0
10 NAME NGC 6845 Quartet CGG 20 00 59.0 -47 04 38           ~ 14 0
11 NAME Stephan's Quintet CGG 22 35 57.5 +33 57 36           ~ 375 1
12 Feige 110 HS* 23 19 58.3995050606 -05 09 56.170282845 10.360 11.45 11.50 11.970 12.145 sdO8VIIIHe5 552 1
13 [LER2004] Mrk 1087 N G ~ ~   17.58       ~ 3 1
14 [LER2004] KPG 103a K2 PoG ~ ~   17.10       ~ 2 1
15 [LER2004] KPG 103a K1 PoG ~ ~   17.55       ~ 3 1
16 [LER2004] KPG 103a K3 PoG ~ ~   17.41       ~ 2 1

    Equat.    Gal    SGal    Ecl

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2020.07.04-21:01:06

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