- ID:
- ivo://CDS.VizieR/J/ApJS/36/53
- Title:
- 2380 MHz survey of bright galaxies
- Short Name:
- J/ApJS/36/53
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A 2380MHz survey of bright galaxies in the declination range from zero to +37{deg} has been made at Arecibo. It is complete to a photographic magnitude of +14.5mag in all right ascensions except between 11h 30min and 13h 00min, where the limit is +14.0mag. Four hundred fifty-six of the 2095 galaxies observed were detected above 15mJy, a cutoff which is the quadratic sum of 5 times the 2mJy rms confusion and 3 times the 3mJy receiver noise on a single scan.
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Search Results
- ID:
- ivo://CDS.VizieR/J/A+AS/74/315
- Title:
- 327 MHz Survey of the A262 cluster region
- Short Name:
- J/A+AS/74/315
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This catalog contains a survey at 327 MHz of the A262 cluster region. The survey was performed with the WSRT Telescope in the redundancy mode, and covers a circular region of 21 square degrees towards A262 (RA = 01h49m50s, decl = 35d54'20" -- B1950). The synthesized beam width is 56" x 93" (RA x DEC). 309 sources were detected, with a detection limit of 7 mJy (~5 sigma) at the field center. Nine of these galaxies have been identified with galaxies of the A262 cluster.
- ID:
- ivo://CDS.VizieR/VII/171
- Title:
- Michigan Emission-Line Objects
- Short Name:
- VII/171
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The objects of this catalogue were detected by using the 61-cm aperture Curtis Schmidt telescope in combination with a thin objective prism (1.8{deg}) at the Cerro Tololo Inter-American Observatory. The low-dispersion spectra (174nm/mm at H{beta}) cover the wavelength range between 5350 and 3400 {AA}, where the emission lines such that those of [OII], [OIII] and Ly{alpha} are visible. The objects could be detected up to 18th magnitude. Note that the list archived here is not the same as the published lists (see the "References" section below): the positions in the "catalog.dat" file are generally more accurate than those in the original publication and the origin for these is not known. In the printed lists of papers , information presented for each object also includes image dimensions from the Palomar Observatory Sky Survey, an estimated continuum apparent magnitude, a redshift estimate when feasible, or (for galaxies) a spectral classification which involves compactness, color, and line-strength parameters.
- ID:
- ivo://CDS.VizieR/J/A+A/418/465
- Title:
- Mid-infrared and hard X-ray emission in AGN
- Short Name:
- J/A+A/418/465
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We use mid-infrared spectral decomposition to separate the 6{mu}m mid-infrared AGN continuum from the host emission in the ISO low resolution spectra of 71 active galaxies and compare the results to observed and intrinsic 2-10keV hard X-ray fluxes from the literature.
- ID:
- ivo://CDS.VizieR/J/AJ/127/3075
- Title:
- Mid-infrared population of ELAIS-S1 sample
- Short Name:
- J/AJ/127/3075
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a multiwavelength catalog (15{mu}m, R-band, K-band, and 1.4GHz flux) plus spectroscopic identifications for 406 15{mu}m sources detected in the European Large Area ISO Survey (ELAIS) region S1, over the flux density range 0.5<S15{mu}m<150mJy. Three hundred thirty-two (~82%) sources are optically identified down to R~23.0. Spectra or bona fide stellar identifications are obtained for 290 objects (~88% of the optically identified sources). The areal coverage, mid-infrared (MIR) and optical completeness of the sample are discussed in order to allow statistical and evolutionary analyses.
- ID:
- ivo://CDS.VizieR/J/A+A/451/57
- Title:
- Mid-infrared properties of luminous IR galaxies
- Short Name:
- J/A+A/451/57
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present evidence that the mid infrared (MIR, rest frame 5-30{mu}m) is a good tracer of the total infrared luminosity, L(IR)(=L[8-1000{mu}m]), and star formation rate (SFR), of galaxies up to z~1.3. We use deep MIR images from the Infrared Space Observatory (ISO) and the Spitzer Space Telescope in the Northern field of the Great Observatories Origins Deep Survey (GOODS-N) together with VLA radio data to compute three independant estimates of L(IR). The L(IR,MIR) derived from the observed 15 and/or 24{mu}m flux densities using a library of template SEDs, and L(IR,radio), derived from the radio (1.4 and/or 8.5GHz) using the radio-far infrared correlation, agree with a 1-sigma dispersion of 40%. We use the k-correction as a tool to probe different parts of the MIR spectral energy distribution (SED) of galaxies as a function of their redshift and find that on average distant galaxies present MIR SEDs very similar to local ones.
- ID:
- ivo://CDS.VizieR/J/A+A/414/825
- Title:
- Mid-infrared spectroscopy of LINERs
- Short Name:
- J/A+A/414/825
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a comprehensive comparative high resolution mid-IR spectroscopic and X-ray imaging investigation of LINERs using archival observations from the ISO-SWS and the Chandra Advanced CCD Imaging Spectrometer. Although the sample is heterogeneous and incomplete, this is the first comprehensive study of the mid-infrared fine structure line emission of LINERs.
- ID:
- ivo://CDS.VizieR/J/MNRAS/454/766
- Title:
- Mid-infrared-X-ray correlation for local AGNs
- Short Name:
- J/MNRAS/454/766
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present an updated mid-infrared (MIR) versus X-ray correlation for the local active galactic nuclei (AGN) population based on the high angular resolution 12 and 18{mu}m continuum fluxes from the AGN subarcsecond MIR atlas and 2-10 keV and 14-195 keV data collected from the literature. We isolate a sample of 152 objects with reliable AGN nature and multi-epoch X-ray data and minimal MIR contribution from star formation. Although the sample is not homogeneous or complete, we show that our results are unlikely to be affected by significant biases. The MIR-X-ray correlation is nearly linear and within a factor of 2 independent of the AGN type and the wavebands used. The observed scatter is <0.4 dex. A possible flattening of the correlation slope at the highest luminosities probed (~10^45^ erg/s) towards low MIR luminosities for a given X-ray luminosity is indicated but not significant. Unobscured objects have, on average, an MIR-X-ray ratio that is only <=0.15 dex higher than that of obscured objects. Objects with intermediate X-ray column densities (22<logN_H_<23) actually show the highest MIR-X-ray ratio on average. Radio-loud objects show a higher mean MIR-X-ray ratio at low luminosities while the ratio is lower than average at high luminosities. This may be explained by synchrotron emission from the jet contributing to the MIR at low luminosities and additional X-ray emission at high luminosities. True Seyfert 2 candidates do not show any deviation from the general behaviour suggesting that they possess a dusty obscurer as in other AGN. Double AGN also do not deviate. Finally, we show that the MIR-X-ray correlation can be used to investigate the AGN nature of uncertain objects. Specifically, we give equations that allow us to determine the intrinsic 2-10 keV luminosities and column densities for objects with complex X-ray properties to within 0.34 dex. These techniques are applied to the uncertain objects of the remaining AGN MIR atlas, demonstrating the usefulness of the MIR-X-ray correlation as an empirical tool.
- ID:
- ivo://CDS.VizieR/J/ApJ/725/2270
- Title:
- Mid-IR emission lines in AGNs
- Short Name:
- J/ApJ/725/2270
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We used Spitzer/Infrared Spectrograph spectroscopic data on 426 galaxies including quasars, Seyferts, LINERs, and HII galaxies to investigate the relationship among the mid-IR emission lines. There is a tight linear correlation between the [NeV]14.3um and 24.3um (97.1eV) and the [OIV]25.9um (54.9eV) high-ionization emission lines. The correlation also holds for these high-ionization emission lines and the [NeIII]15.56um (41eV) emission line, although only for active galaxies. We used these correlations to calculate the [NeIII] excess due to star formation in Seyfert galaxies. We also estimated the [OIV] luminosity due to star formation in active galaxies and determined that it dominates the [OIV] emission only if the contribution of the active nucleus to the total luminosity is below 5%. We find that the active galactic nucleus dominates the [OIV] emission in most Seyfert galaxies, whereas star formation adequately explains the observed [OIV] emission in optically classified HII galaxies. Finally, we computed photoionization models to determine the physical conditions of the narrow-line region where these high-ionization lines originate. The estimated ionization parameter range is -2.8<logU<-2.5 and the total hydrogen column density range is 20<logn_H_(cm^-2^)<21.
- ID:
- ivo://CDS.VizieR/J/A+A/406/867
- Title:
- Mid-IR galaxies in Virgo cluster. III.
- Short Name:
- J/A+A/406/867
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present ISOCAM imaging data at 6.75 and 15{mu}m for 145 galaxies in the Virgo cluster and in the Coma/A1367 supercluster. Of these, 99 form a complete, optically-selected, volume-limited sample including galaxies in the core and in the periphery of the Virgo cluster, suitable for statistical analysis. 34 of the Virgo galaxies were resolved by ISOCAM: for these objects we present mid-IR images, radial light and colour profiles, as well as effective and isophotal radii, surface brightness and light concentration indices.