Publications (20)
V- and I-band observations of the halo of NGC 5907
J. Lequeux, B. Fort, M. Dantel-Fort Fort +2
Using long exposures taken in the V and I bands with a 40964096 pixel CCD array at the prime focus of the Canada-France-Hawaii telescope, we have confirmed the discovery by…
Results of the ESO-SEST Key Programme on CO in the Magellanic Clouds. IX. The giant LMC HII region complex N11
F. P. Israel, Th. de Graauw, L. E. B. Johansson +7
We present maps and a catalogue containing the J=1-0 12CO parameters of 29 individual molecular clouds in the second-brightest LMC star formation complex, N11. In the southwestern…
Abundance differences between the neutral and the ionized gas of the dwarf galaxy IZw 36
V. Lebouteiller, D. Kunth, J. Lequeux +4
We present a FUSE spectroscopic study of the nearby gas--rich, metal--deficient blue compact dwarf (BCD) galaxy IZw 36. Atomic hydrogen and many metal lines are observed in absorpt…
ISO observations of the reflection nebula Ced 201: evolution of carbonaceous dust
D. Cesarsky, J. Lequeux, C. Ryter +1
We present spectrophotometric imaging mid-IR observations of the reflection nebula Ced201. Ced201 is a part of a molecular cloud illuminated by a B9.5V star moving through it at mo…
Mid--IR emission of galaxies in the Virgo cluster: II. Integrated properties
A. Boselli, J. Lequeux, M. Sauvage +7
We analyse the integrated properties of the Mid-IR emission of a complete, optically selected sample of galaxies in the Virgo cluster observed with the ISOCAM instrument on board t…
Mid-IR and Far-UV observations of the star-forming ring of M 31
L. Pagani, J. Lequeux, D. Cesarsky +4
We present mid-IR images of a 15'x15' field in the south-west part of the Andromeda galaxy M 31 obtained with the ISOCAM camera on board ISO. We also present a 20" resolution far-U…
[CII] at 158 mic as a star formation tracer in late-type galaxies
A. Boselli, G. Gavazzi, J. Lequeux +1
We present a calibration of the massive star formation rate vs. [CII] luminosity relation based on a sample of nearby, late-type galaxies observed with ISO-LWS and imaged in the Ha…
NGC 5907 revisited: a stellar halo formed by cannibalism?
J. Lequeux, F. Combes, M. Dantel-Fort +3
We report on further observations of the luminous halo of NGC 5907. New V, I and B deep photometry confirms the existence of an extended stellar halo redder than the disk. Our data…
Mid-IR emission of galaxies in the Virgo cluster and in the Coma supercluster.IV. The nature of the dust heating sources
A. Boselli, J. Lequeux, G. Gavazzi
We study the relationship between the mid-IR (5-18 m) emission of late-type galaxies and various other star formation tracers in order to investigate the nature of the dust hea…
UV HST Spectroscopy of Star-Forming Galaxies
D. Kunth, J. Lequeux, J. M. Mas-Hesse +2
HST spectroscopical observations of 8 HII galaxies are reported. Ly alpha emission was detected in 4 of them. We find that the velocity structure of the gas is the main determining…
Evidences for an expanding shell in the Blue Compact Dwarf Galaxy Haro 2
F. Legrand, D. Kunth, J. M. Mas-Hesse +1
Long-slit observations of the blue compact galaxy Haro 2 have been performed to detect the Halpha emission originating in the partially ionized wind outflowing at 200 km/s, that ha…
Silicate emission in Orion
D. Cesarsky, A. P. Jones, J. Lequeux +1
We present mid-infrared spectro-imagery and high-resolution spectroscopy of the Orion bar and of a region in the Orion nebula. These observations have been obtained in the Guarante…
Interstellar abundances in the neutral and ionized gas of NGC604
V. Lebouteiller, D. Kunth, J. Lequeux +5
We present FUSE spectra of the giant HII region NGC604 in the spiral galaxy M33. Chemical abundances are derived from far-UV absorption lines and are compared to those derived from…
Gas cooling within the diffuse ISM of late-type galaxies
D. Pierini, J. Lequeux, A. Boselli +2
We combine observations of spiral galaxies in the [CII] line at 158 micron, made with the Long Wavelength Spectrometer aboard ISO, with previous data from the Kuiper Airborne Obser…
Mid-infrared imaging and spectrophotometry of N 66 in the SMC with ISOCAM
A. Contursi, J. Lequeux, C. Cesarsky
We present observations with the mid-infrared camera ISOCAM on board ISO of the major star-forming region N66 in the Small Magellanic Cloud and of its surroundings. These observati…
Results of the ESO-SEST Key Programme on CO in the Magellanic Clouds X. CO emission from star formation regions in LMC and SMC
F. P. Israel, L. E. B. Johansson, M. Rubio +7
We present J=1-0 and J=2-1 12CO maps of several star-forming regions in both the Large and the Small Magellanic Cloud, and briefly discuss their structure. Many of the detected mol…
HST study of Lyman-alpha emission in star-forming galaxies: the effect of neutral gas flows
D. Kunth, J. M. Mas-Hesse, E. Terlevich +3
We present high dispersion HST GHRS UV spectroscopic observations of 8 HII galaxies covering a wide range of metallicities and physical properties. We have found Lyalpha emission i…
An atlas of mid-infrared dust emission in spiral galaxies
H. Roussel, L. Vigroux, A. Bosma +7
We present maps of dust emission at 7 microns and 15 microns/7 microns intensity ratios of selected regions in 43 spiral galaxies observed with ISOCAM. This atlas is a complement t…
Molecular gas in late-type galaxies
A. Boselli, J. Lequeux, G. Gavazzi
We present CO(J=1--0) line observations of 22 low-luminosity spiral galaxies in the Virgo cluster. These data, together with 244 others available in the literature, allow us…
No diffuse H2 in the metal deficient galaxy I Zw 18
A. Vidal-Madjar, D. Kunth, A. Lecavelier des Etangs +12
The metal deficient starburst galaxy IZw18 has been observed with FUSE in a search for H2 molecules. The spectrum obtained with an aperture covering the full galaxy shows no absorp…