Spatial resolution bias in the mid-infrared Starburst/AGN classification

Laurent, O.; Mirabel, I.F.; Charmandaris, V.; Gallais, P.; Sauvage, M.; Vigroux, L.; Cesarsky, C.J.

Spatial resolution bias in the mid-infrared Starburst/AGN classification

O. Laurent
(
- DSM, DAPNIA, Saclay
)
,
I.F. Mirabel
(
- DSM, DAPNIA, Saclay and
- Buenos Aires, IAFE
)
,
V. Charmandaris
(
- Paris Observ.
)
,
P. Gallais
(
- DSM, DAPNIA, Saclay
)
,
M. Sauvage
(
- DSM, DAPNIA, Saclay
)

May, 2000

4 pages

Part of Building galaxies : from the primordial universe to the present : Proceedings, 34th Rencontres de Moriond, Les Arcs, France, Mar 13-20, 1999, 79-84

Contribution to:

34th Rencontres de Moriond and 19th Moriond Astrophysics Meeting: Building the Galaxies: From the Primordial Universe to the Present, 79-84

e-Print:

astro-ph/0005377 [astro-ph]

View in:

ADS Abstract Service

pdf

reference search3 citations

Citations per year

Abstract: (arXiv)

We present the effects of limited spatial resolution to the observed mid-infrared (MIR) spectrum of an active galactic nucleus (AGN) surrounded by a disk with massive star forming regions. Using MIR observations of the face-on nearby Seyfert 1 galaxy NGC 6814, we vary the observing aperture and examine the evolution of the observed AGN/starburst fraction with our MIR diagnostic. We show that the spatial resolution of ISOCAM is sufficient to disentangle AGN from starburst features in nuclear regions of nearby galaxies (D<50Mpc). However, with the exception of a few ultra-luminous galaxies, dilution effects hide completely the AGN contribution in more distant galaxies.

References(13)

Figures(0)

[1]

Infrared spectrophotometry of M17 with ISOCAM

et al.

- Astron.Astrophys. 315 (1996) L309-L312

[2]

8-13 micron spectroscopy of luminous and ultraluminous infrared galaxies

C.C. Dudley

- Mon.Not.Roy.Astron.Soc. 307 (1999) 553
•
e-Print:
- astro-ph/9903250
•
DOI:
- 10.1046/j.1365-8711.1999.02631.x

[3]

1998 579

Genzel R.
,
Lutz D.
,
Sturm E.

- Astrophys.J. 4 (1998) 98

[4]

1998

Genzel R.
,
Lutz D.
,
Tacconi L.

- Nature 395 (1998) 29

[5]

1999, Astr. Astrophys., submitted

Laurent O.
,
Mirabel I.F.
,
Charmandaris V.

[6]

1999, in preparation

Laurent O.
,
Mirabel I.F.
,
Charmandaris V.

[7]

1998

Lutz D.
,
Spoon H.W.W.
,
Rigopoulou D.
,
Moorwood A.F.M.
,
Genzel R.

- Astron.Astrophys. 505 (1998) L103

[8]

Detection of widely distributed uir band emission in the disk of ngc 891

- Astron.Astrophys. 342 (1999) 643
•
e-Print:
- astro-ph/9812346

[9]

Moorwood A.F.M.
,
Lutz D.
,
Oliva E.

- Astron.Astrophys. 315 L109

[10]

1991

Roche P.F.
,
Aitken D.K.
,
Smith C.
,
Ward M.

- Mon.Not.Roy.Astron.Soc. 248 (1991) 606

[11]

1998, PhD thesis, University of Paris XI, France

Tran D.

[12]

1971

Ulrich M.-H.

- Astrophys.J. 165 (1971) L61

[13]

1996

Verstraete L.
,
Puget J.L.
,
Falgarone E.

- Astron.Astrophys. 315 (1996) L337