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181. Australia Telescope PMN follow-up survey
ID:
ivo://CDS.VizieR/J/MNRAS/422/1527
Title:
Australia Telescope PMN follow-up survey
Short Name:
J/MNRAS/422/1527
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present a source catalogue derived from high-resolution observations of a selection of PMN sources with the Australia Telescope Compact Array (ATCA). The catalogue lists 8385 sources with flux-density measurements at 4.8 and 8.6GHz, derived from observations of all fields in the declination range -87{deg}<DE<-38.5{deg} (exclusive of galactic latitudes |b|<2{deg{) with PMN flux-density S_4850_>70mJy (50mJy south of DE=-73{deg}). We assess the quality of the data, which was gathered in 1992-1994, and the resulting source parameters. We describe the population of catalogued sources, and compare it to samples from complementary catalogues. In particular we find 126 radio sources with probable association with gamma-ray sources observed by the orbiting Fermi Large Area Telescope.
182. A VLA Search for Young Galactic Supernova Remnants
ID:
ivo://CDS.VizieR/J/AJ/104/704
Title:
A VLA Search for Young Galactic Supernova Remnants
Short Name:
J/AJ/104/704
Date:
21 Oct 2021
Publisher:
CDS
Description:
In the attempt to identify very young galactic supernova remnants (SNRs), 290 known compact (<2') galactic plane radio sources were observed at 20cm using the VLA in its 36 km configuration. The VLA observations described could detect supernovae with diameters between 5 and 20"; these would have an age of between 25 and 100 yr. Compact structure was detected in 168 (58%) of the 290 different sources observed; 73 sources (25%) were unresolved or slightly resolved point sources, 21 (7%) were single-well resolved, 56 (19%) were double, 18 (6%) were triple or complex. The large scale structure was completely resolved out for 122 (42%) of sources. Additional observations at 6cm with the VLA in the 11 km configuration were made of 14 sources with apparent shell structures that might have been characteristic of young SNRs. Low resolution observations were made at 20cm of 62 fields where the source was completely resolved out in the high resolution images. Only one source, G25.5+0.2, is a possible very young SNR. New H66_alpha recombination line observations place severe constrains on any thermal interpretation for this object.
183. A XMM-Newton survey of the SXRB
ID:
ivo://CDS.VizieR/J/ApJS/187/388
Title:
A XMM-Newton survey of the SXRB
Short Name:
J/ApJS/187/388
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present measurements of the soft X-ray background (SXRB) OVII and OVIII intensity between l=120{deg} and l=240{deg}, the first results of a survey of the SXRB using archival XMM-Newton observations. We do not restrict ourselves to blank-sky observations, but instead use as many observations as possible, removing bright or extended sources by hand if necessary. In an attempt to minimize contamination from near-Earth solar wind charge exchange (SWCX) emission, we remove times of high solar wind proton flux from the data. Without this filtering we are able to extract measurements from 586 XMM-Newton observations. With this filtering, ~1/2 of the observations are rendered unusable, and we are able to extract measurements from 303 observations. The oxygen intensities are typically ~0.5-10 photons/cm^2^/s/sr (line units, L.U.) for OVII and ~0-5L.U. for OVIII. The proton flux filtering does not systematically reduce the oxygen intensities measured from a given observation. However, the filtering does preferentially remove the observations with higher oxygen intensities. Our data set includes 69 directions with multiple observations, whose oxygen intensity variations can be used to constrain SWCX models. After removing observations likely to be contaminated by heliospheric SWCX emission, we use our results to examine the Galactic halo.
184. Azimuthal anistropy of stellar galactic disks
ID:
ivo://CDS.VizieR/J/A+A/618/A121
Title:
Azimuthal anistropy of stellar galactic disks
Short Name:
J/A+A/618/A121
Date:
21 Oct 2021
Publisher:
CDS
Description:
The ellipsoid of stellar random motions is a fundamental ingredient of galaxy dynamics. Yet it has long been difficult to constrain this component in disks others than the Milky Way. This article presents the modeling of the azimuthal-to-radial axis ratio of the velocity ellipsoid of galactic disks from stellar dispersion maps using integral field spectroscopy data of the CALIFA survey. The measured azimuthal anisotropy is shown to be not strongly dependent on the assumed vertical-to-radial dispersion ratio of the ellipsoid. The anisotropy distribution shows a large diversity in the orbital structure of disk galaxies from tangential to radial stellar orbits. Globally, the orbits are isotropic in inner disk regions and become more radial as a function of radius, although this picture tends to depend on galaxy morphology and luminosity. The Milky Way orbital anisotropy profile measured from the Second Gaia Data Release is consistent with those of CALIFA galaxies. A new correlation is evidenced, linking the absolute magnitude or stellar mass of the disks to the azimuthal anisotropy. More luminous disks have more radial orbits and less luminous disks have isotropic and somewhat tangential orbits. This correlation is consistent with the picture in galaxy evolution in which orbits become more radial as the mass grows and is redistributed as a function of time. With the help of circular velocity curves, it is also shown that the epicycle theory fails to reproduce the diversity of the azimuthal anisotropy of stellar random motions, as it predicts only nearly radial orbits in the presence of flat curves. The origin of this conflict is yet to be identified. It also questions the validity of the vertical-to-radial axis ratio of the velocity ellipsoid derived by many studies in the framework of the epicyclic approximation.
185. AzTEC/ASTE 1.1mm observations in the ADF-S
ID:
ivo://CDS.VizieR/J/MNRAS/411/102
Title:
AzTEC/ASTE 1.1mm observations in the ADF-S
Short Name:
J/MNRAS/411/102
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present results of a 1.1-mm deep survey of the AKARI Deep Field South (ADF-S) with AzTEC mounted on the Atacama Submillimetre Telescope Experiment (ASTE). We obtained a map of 0.25-deg^2^ area with an rms noise level of 0.32-0.71mJy. This is one of the deepest and widest maps thus far at millimetre and submillimetre wavelengths. We uncovered 198 sources with a significance of 3.5{sigma}-15.6{sigma}, providing the largest catalogue of 1.1-mm sources in a contiguous region. Most of the sources are not detected in the far-infrared bands of the AKARI satellite, suggesting that they are mostly at z>=1.5 given the detection limits. We constructed differential and cumulative number counts in the ADF-S, the Subaru/XMM-Newton Deep Field and the SSA 22 field surveyed by AzTEC/ASTE, which provide currently the tightest constraints on the faint end.
186. AzTEC/ASTE source catalogue
ID:
ivo://CDS.VizieR/J/MNRAS/415/3831
Title:
AzTEC/ASTE source catalogue
Short Name:
J/MNRAS/415/3831
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present a 0.72deg^2^ contiguous 1.1-mm survey in the central area of the Cosmological Evolution Survey field carried out to a 1{sigma}~1.26mJy/beam depth with the AzTEC camera mounted on the 10-m Atacama Submillimeter Telescope Experiment. We have uncovered 189 candidate sources at a signal-to-noise ratio (S/N)>=3.5, out of which 129, with S/N>=4, can be considered to have little chance of being spurious (<~2 per cent). We present the number counts derived with this survey, which show a significant excess of sources when compared to the number counts derived from the ~0.5deg^2^ area sampled at similar depths in the Submillimetre Common-User Bolometer Array (SCUBA) HAlf Degree Extragalactic Survey (SHADES).
187. AzTEC deep-field observations
ID:
ivo://CDS.VizieR/J/MNRAS/423/529
Title:
AzTEC deep-field observations
Short Name:
J/MNRAS/423/529
Date:
21 Oct 2021
Publisher:
CDS
Description:
Instruments using arrays of many bolometers have become increasingly common in the past decade. The maps produced by such instruments typically include the filtering effects of the instrument as well as those from subsequent steps performed in the reduction of the data. Therefore interpretation of the maps is dependent upon accurately calculating the transfer function of the chosen reduction technique on the signal of interest. Many of these instruments use non-linear and iterative techniques to reduce their data because such methods can offer an improved signal-to-noise ratio over those that are purely linear, particularly for signals at scales comparable to that subtended by the array. We discuss a general approach for measuring the transfer function of principal component analysis on point sources that are small compared to the spatial extent seen by any single bolometer within the array. The results are applied to previously released AzTEC catalogues of the Cosmic Evolution Survey (COSMOS), Lockman Hole, Subaru XMM-Newton Deep Field, Great Observatories Origins Deep Survey (GOODS)-North and GOODS-South fields. Source flux density and noise estimates increase by roughly +10 per cent for fields observed while AzTEC was installed at the Atacama Submillimeter Telescope Experiment and +15-25 per cent while AzTEC was installed at the James Clerk Maxwell Telescope. Detection significance is, on average, unaffected by the revised technique. The revised photometry technique will be used in subsequent AzTEC releases.
188. AzTEC millimetre survey of COSMOS field
ID:
ivo://CDS.VizieR/J/MNRAS/385/2225
Title:
AzTEC millimetre survey of COSMOS field
Short Name:
J/MNRAS/385/2225
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present a 1.1mm wavelength imaging survey covering 0.3deg^2^ in the COSMOS field. These data, obtained with the AzTEC continuum camera on the James Clerk Maxwell Telescope, were centred on a prominent large-scale structure overdensity which includes a rich X-ray cluster at z>>0.73. A total of 50mm-galaxy candidates, with a significance ranging from 3.5 to 8.5sigma, are extracted from the central 0.15deg^2^ area which has a uniform sensitivity of 1.3mJy/beam. 16 sources are detected with S/N>=4.5, where the expected false-detection rate is zero, of which a surprisingly large number (9) have intrinsic (deboosted) fluxes >=5mJy at 1.1mm.
189. AzTEC survey of the SHADES fields. I.
ID:
ivo://CDS.VizieR/J/MNRAS/401/160
Title:
AzTEC survey of the SHADES fields. I.
Short Name:
J/MNRAS/401/160
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the first results from the largest deep extragalactic mm-wavelength survey undertaken to date. These results are derived from maps covering over 0.7deg^2^, made at {lambda}=1.1mm, using the AzTEC continuum camera mounted on the James Clerk Maxwell Telescope. The maps were made in the two fields originally targeted at {lambda}=850um with the Submillimetre Common-User Bolometer Array (SCUBA) in the SCUBA Half-Degree Extragalactic Survey (SHADES) project, namely the Lockman Hole East (mapped to a depth of 0.9-1.3mJy rms) and the Subaru/XMM-Newton Deep Field (mapped to a depth of 1.0-1.7mJy rms). The wealth of existing and forthcoming deep multifrequency data in these two fields will allow the bright mm source population revealed by these new wide-area 1.1mm images to be explored in detail in subsequent papers. Here, we present the maps themselves, a catalogue of 114 high-significance submillimetre galaxy detections, and a thorough statistical analysis leading to the most robust determination to date of the 1.1mm source number counts. These new maps, covering an area nearly three times greater than the SCUBA SHADES maps, currently provide the largest sample of cosmological volumes of the high-redshift Universe in the mm or sub-mm. Through careful comparison, we find that both the Cosmic Evolution Survey (COSMOS) and the Great Observatories Origins Deep Survey (GOODS) North fields, also imaged with AzTEC, contain an excess of mm sources over the new 1.1mm source-count baseline established here.
190. AzTEC survey of the SHADES fields. II.
ID:
ivo://CDS.VizieR/J/MNRAS/426/1845
Title:
AzTEC survey of the SHADES fields. II.
Short Name:
J/MNRAS/426/1845
Date:
21 Oct 2021
Publisher:
CDS
Description:
The Astronomical Thermal Emission Camera (AzTEC) 1.1mm survey of the two SCUBA HAlf Degree Extragalactic Survey (SHADES) fields is the largest (0.7deg^2^) blank-field millimetre-wavelength (mm-wavelength) survey undertaken to date at a resolution of 18arcsec and a depth of 1mJy. We have used the deep optical to radio multiwavelength data in the SHADES Lockman Hole East and SXDF/UDS fields to obtain galaxy identifications for 64 per cent (80 per cent including tentative identifications) of the 148 AzTEC-SHADES 1.1mm sources reported by Austermann et al., exploiting deep radio and 24um data complemented by methods based on 8um flux density and red optical-infrared (i-K) colour.

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