2010A&A...524A..56E


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.15CET12:22:01

2010A&A...524A..56E - Astronomy and Astrophysics, volume 524, A56-56 (2010/12-1)

NGC 6240: merger-induced star formation and gas dynamics.

ENGEL H., DAVIES R.I., GENZEL R., TACCONI L.J., HICKS E.K.S., STURM E., NAAB T., JOHANSSON P.H., KARL S.J., MAX C.E., MEDLING A. and VAN DER WERF P.P.

Abstract (from CDS):

We present spatially resolved integral field spectroscopic K-band data at a resolution of 0.13'' (60pc) and interferometric CO(2-1) line observations of the prototypical merging system NGC 6240. Despite the clear rotational signature, the stellar kinematics in the two nuclei are dominated by dispersion. We use Jeans modelling to derive the masses and the mass-to-light ratios of the nuclei. Combining the luminosities with the spatially resolved Brγ equivalent width shows that only 1/3 of the K-band continuum from the nuclei is associated with the most recent star forming episode; and that less than 30% of the system's bolometric luminosity and only 9% of its stellar mass is due to this starburst. The star formation properties, calculated from typical merger star formation histories, demonstrate the impact of different assumptions about the star formation history. The properties of the nuclei, and the existence of a prominent old stellar population, indicate that the nuclei are remnants of the progenitor galaxies' bulges.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: individual: NGC 6240 - galaxies: interactions - galaxies: evolution - galaxies: star formation - galaxies: starburst

Simbad objects: 14

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Number of rows : 14

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 UGC 12914 LIN 00 01 38.304 +23 29 01.18   13.2       ~ 132 1
2 NAME Carina dSph G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 955 0
3 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1535 0
4 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 3896 3
5 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2625 4
6 HD 147550 * 16 22 38.9043444852 -02 04 47.523526116   6.288 6.241     B9V 93 0
7 [MCM2005] South 1 PoG 16 52 58.859 +02 24 01.95   22.40 20.40   17.39 ~ 4 0
8 NGC 6240 Sy2 16 52 58.861 +02 24 03.55   14.31 13.37     ~ 1447 2
9 [MCM2005] North 1 PoG 16 52 58.914 +02 24 03.64   21.00 19.75   17.73 ~ 3 0
10 HD 168815A * 18 22 13.89 -15 05 17.8   9.74 7.83     K5+II 18 0
11 HD 176617 * 19 02 43.8675781076 -36 39 28.742111892   9.86 8.16     M3III 7 0
12 HD 185318 * 19 39 10.4557985730 -17 24 14.470992174   10.05 9.49     F6V 3 0
13 ESO 74-20 IG 20 54 10.1 -69 02 18   15.76   14.88   ~ 10 0
14 NGC 7252 IG 22 20 44.7751096408 -24 40 41.905677809 12.26 12.46 12.06 11.57   ~ 656 1

    Equat.    Gal    SGal    Ecl

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2019.11.15-12:22:01

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