K. Leech
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View article: ISO observations of the interacting galaxy Markarian 297
ISO observations of the interacting galaxy Markarian 297 Open
\n Markarian (Mkn) 297 is a complex system comprised of two\ninteracting galaxies that has been modelled with a variety of\nscenarios. Observations of this system were made with the Infrared\nSpace Observatory (ISO) using the ISOCAM, ISOPH…
View article: ISO observations of the interacting galaxy Markarian 297: with the powerful supernova remnant 1982aa
ISO observations of the interacting galaxy Markarian 297: with the powerful supernova remnant 1982aa Open
Markarian (Mkn) 297 is a complex system with two interacting galaxies. Observations were made with ISO using ISOCAM, ISOPHOT and LWS. We present ISOCAM maps at 6.7, 7.7, 12 and 14.3 microns which, with PHT-S spectrometry of the central int…
View article: An ISOCAM survey through gravitationally lensing galaxy clusters
An ISOCAM survey through gravitationally lensing galaxy clusters Open
We observed the cluster Abell 2218 (z=0.175), with ISOCAM on board the\nInfrared Space Observatory, using two filters with reference wavelengths of 6.7\nand 14.3 microns. We detected 67 extragalactic mid-infrared sources. Using the\n``GRAS…
View article: An ISOCAM survey through gravitationally lensing galaxy clusters. II. The properties of infrared galaxies in the A2218 field
An ISOCAM survey through gravitationally lensing galaxy clusters. II. The properties of infrared galaxies in the A2218 field Open
We observed the cluster Abell 2218 (z=0.175), with ISOCAM on board the Infrared Space Observatory, using two filters with reference wavelengths of 6.7 and 14.3 microns. We detected 67 extragalactic mid-infrared sources. Using the ``GRASIL'…
View article: An ISOCAM survey through gravitationally lensing galaxy clusters
An ISOCAM survey through gravitationally lensing galaxy clusters Open
ISOCAM was used to perform a deep survey through three gravitationally lensing clusters of galaxies. Nearly seventy sq. arcmin were covered over the clusters A370, A2218 and A2390. We present maps and photometry at 6.7 & 14.3 microns, show…
View article: [C II] emission and star formation in late-type galaxies
[C II] emission and star formation in late-type galaxies Open
We study the relationship between gas cooling via the [C II] (158 micron) line emission and dust cooling via the far-IR continuum emission on the global scale of a galaxy in normal (i.e. non-AGN dominated and non-starburst) late-type syste…
View article: Star Formation in the [ITAL]Infrared Space Observatory[/ITAL] Atlas of Bright Spiral Galaxies
Star Formation in the [ITAL]Infrared Space Observatory[/ITAL] Atlas of Bright Spiral Galaxies Open
We investigate star formation along the Hubble sequence using the ISO Atlas of Spiral Galaxies. Using mid-infrared and far-infrared flux densities normalized by K-band flux densities as indicators of recent star formation, we find several …
View article: An [ITAL]Infrared Space Observatory[/ITAL] Atlas of Bright Spiral Galaxies
An [ITAL]Infrared Space Observatory[/ITAL] Atlas of Bright Spiral Galaxies Open
In this first paper in a series we present an atlas of infrared images and photometry from 1.2 to 180 μm for a sample of bright spiral galaxies. The atlas galaxies are an optically selected, magnitude-limited sample of 77 spiral and S0 gal…
View article: A 25 micron search for Vega-like disks around main-sequence stars withISO
A 25 micron search for Vega-like disks around main-sequence stars withISO Open
\n We present an ISO 25 μm photometric survey of a sample of 81 nearby\nmain-sequence stars in order to determine the incidence of “warm” dust disks.\nAll stars were detected by ISO. We used an empirical relation to estimate the\nphotosphe…
View article: Far‐Infrared Photometry of a Statistical Sample of Late‐Type Virgo Cluster Galaxies
Far‐Infrared Photometry of a Statistical Sample of Late‐Type Virgo Cluster Galaxies Open
We present deep diffraction-limited far-infrared ( FIR) strip maps of a sample of 63 galaxies later than S0 and brighter than B-T = 16.8, selected from the Virgo Cluster Catalogue of Binggeli, Sandage, & Tammann. The ISOPHOT instrument on …
View article: Optical to Far-IR Observations of 3C 446
Optical to Far-IR Observations of 3C 446 Open
The OVV blazar 3C 446 was monitored over seven months in 1997 with ground based telescopes and instruments on ESA's Infrared Space Observatory (ISO). The aim was to try to detect variations in the IR and see if these were correlated with o…
View article: <i>ISO</i>observations of the dusty quasar BR 1202−0725
<i>ISO</i>observations of the dusty quasar BR 1202−0725 Open
We present mid- and far-IR photometry of the high-redshift (z=4.69) dusty quasar BR1202-0725. The quasar was detected in the near-IR, at a flux level (0.7+/-0.2 mJy) consistent with an average Radio-Quiet Quasar at it's redshift. Only uppe…
View article: Gas cooling within the diffuse ISM of late-type galaxies
Gas cooling within the diffuse ISM of late-type galaxies Open
\n \nWe combine observations of spiral galaxies in the [CII]\nline at 158 μm, made with the Long Wavelength Spectrometer aboard ISO,\nwith previous data from the Kuiper Airborne Observatory to study the origin\nof this line, which is the m…
View article: ISO observations of the Wolf-Rayet galaxy NGC 7714 and its companion object NGC 7715
ISO observations of the Wolf-Rayet galaxy NGC 7714 and its companion object NGC 7715 Open
The interacting system Arp 284 consisting of the Wolf-Rayet galaxy NGC 7714 and its irregular companion NGC 7715 was observed using the Infrared Space Observatory. Deconvolved ISOCAM maps of the galaxies using the 14.3, 7.7 and 15 micron L…
View article: ISO observations of a sample of 60 micron peaker galaxies
ISO observations of a sample of 60 micron peaker galaxies Open
The sample of IRAS galaxies with spectral energy distributions that peak near 60 microns are called Sixty Micron Peakers (SMPs or 60PKs). Their generally peculiar and amorphous morphologies, hot dust and lack of a cirrus component have bee…
View article: 2.5-11 micron spectroscopy and imaging of AGNs: implication for unification schemes
2.5-11 micron spectroscopy and imaging of AGNs: implication for unification schemes Open
We present 2.5-11 micron spectrophotometric & imaging ISO observations of 28 Sf1, 29 Sf2 & 1 normal galaxy. The Sf1 & Sf2 MIR spectra are statistically different: Sf1 have a strong power-law continuum of index -0.84+/-0.24 & weak PAH emiss…
View article: [C ii] 158-μm observations of a sample of late-type galaxies from the Virgo cluster
[C ii] 158-μm observations of a sample of late-type galaxies from the Virgo cluster Open
We have observed 19 Virgo cluster spiral galaxies with the Long Wavelength Spectrometer (LWS) onboard ESA's Infrared Space Observatory (ISO) obtaining spectra around the [C ii] 157.741-μm fine-structure line. These 19 galaxies are quiescen…
View article: An ISOCAM Mid-IR Survey through Gravitationally Lensing Galaxy Clusters
An ISOCAM Mid-IR Survey through Gravitationally Lensing Galaxy Clusters Open
We present imaging results and source counts from a deep ISOCAM cosmological survey at 15 microns, through gravitationally lensing galaxy clusters. We take advantage of the cluster gravitational amplification to increase the sensitivity of…
View article: [Cii] emission and star formation in late-type galaxies
[Cii] emission and star formation in late-type galaxies Open
We demonstrate the existence of a reasonably tight linear correlation between the ratio of the [Cii (2P3/2-2 P1/2)] (λ 158 μ m) fine-structure cooling line intensity to the [12CO (J=1 → 0)] (λ 2.6 mm) line emission, ICii/ICO, and the H α (…
View article: A Deep and Ultra-deep ISOCAM Cosmological Survey through Gravitationally Lensing Clusters of Galaxies
A Deep and Ultra-deep ISOCAM Cosmological Survey through Gravitationally Lensing Clusters of Galaxies Open
We present imaging results and source counts from an ISOCAM deep and ultra-deep cosmological survey through gravitationally lensing clusters of galaxies at 7 and 15 microns. A total area of about 53 sq.arcmin was covered in maps of three c…
View article: A Deep and Ultra-deep ISOCAM Cosmological Survey through Gravitationally Lensing Clusters of Galaxies
A Deep and Ultra-deep ISOCAM Cosmological Survey through Gravitationally Lensing Clusters of Galaxies Open
We present imaging results and source counts from an ISOCAM deep and ultra-deep cosmological survey through gravitationally lensing clusters of galaxies at 7 and 15 microns. A total area of about 53 sq.arcmin was covered in maps of three c…
View article: 2.5–11.6 μ Spectrophotometry and Imaging of AGNs
2.5–11.6 μ Spectrophotometry and Imaging of AGNs Open
We present low resolution spectrophotometric and imaging ISO observations of a sample of 58 AGN's over the 2.5–11.6 μ range. The data strongly support unification schemes and set new constraints on models of the molecular torus.
View article: An ultra-deep ISOCAM observation through a cluster-lens
An ultra-deep ISOCAM observation through a cluster-lens Open
. We present results of ultra-deep ISOCAM observations through a cluster-lens at 7¯m and 15¯m with the Infrared Space Observatory (ISO) satellite. These observations reveal a large number of luminous Mid-Infrared (MIR) sources. Cross-ident…
View article: An ultra-deep ISOCAM observation through a cluster-lens
An ultra-deep ISOCAM observation through a cluster-lens Open
We present results of ultra-deep ISOCAM observations through a cluster-lens at 7 and 15 micron with the Infrared Space Observatory (ISO) satellite. These observations reveal a large number of luminous Mid-Infrared (MIR) sources. Cross-iden…
View article: 2.5-12 micron spectrophotometry and imaging of the CfA sample
2.5-12 micron spectrophotometry and imaging of the CfA sample Open
We present low resolution spectrophotometric and imaging ISO observations of a sample of 54 AGN's over the 2.5-11 micron range. The observations generally support unification schemes and set new constraints on models of the molecular torus.
View article: ISO Mid-Infrared Observations of Abell 370
ISO Mid-Infrared Observations of Abell 370 Open
We report on the mid-IR imaging at 7 and 10 microns of the galaxy cluster Abell 370, obtained with the ISOCAM instrument onboard ESA's Infrared Space Observatory (ISO), as part of an ongoing program to image gravitational arcs and arclets …
View article: Deep ISOCAM Observations of Abell 2218
Deep ISOCAM Observations of Abell 2218 Open
We report on the mid-infrared imaging at 5, 7, 10 and 15 microns of the galaxy cluster Abell 2218 obtained with the ISOCAM instrument onboard ESA's Infrared Space Observatory (ISO), as part of an on-going program to image gravitational arc…
View article: New Wavelength Determinations of Mid‐Infrared Fine‐structure Lines by<i>Infrared Space Observatory</i>Short Wavelength Spectrometer
New Wavelength Determinations of Mid‐Infrared Fine‐structure Lines by<i>Infrared Space Observatory</i>Short Wavelength Spectrometer Open
We report accurate new wavelengths for 29 mid-infrared ionic fine-structure lines, based on observations with the Short Wavelength Spectrometer (SWS) on board the Infrared Space Observatory (ISO). Our results originate from observations of…
View article: A search for interstellar gas-phase CO2 gas : Solid state abundance ratios
A search for interstellar gas-phase CO2 gas : Solid state abundance ratios Open
We present searches for gas-phase CO2 features in the ISO-SWS infrared spectra of four deeply embedded massive young stars, which all show strong solid CO2 absorption. The abundance of gas-phase CO2 is at most 2 10 7 with respect to H2, an…