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1041. Faint galaxy redshift survey
ID:
ivo://CDS.VizieR/J/MNRAS/235/827
Title:
Faint galaxy redshift survey
Short Name:
J/MNRAS/235/827
Date:
21 Oct 2021
Publisher:
CDS
Description:
Using the fibre optic coupler at the Anglo-Australian Observatory, we have completed a new faint galaxy redshift survey. Intermediate dispersion spectra with resolution ~4{AA} have been gathered for over 200 field galaxies selected in apparent magnitude slices between 20.0<b_J_<21.5mag in five high-latitude fields. Redshift completeness is 85% and the mean redshift agrees well from field to field.
1042. Faint Interacting Galaxies
ID:
ivo://CDS.VizieR/VII/205
Title:
Faint Interacting Galaxies
Short Name:
VII/205
Date:
21 Oct 2021
Publisher:
CDS
Description:
We have carried out an extensive survey of faint galaxies in order to examine the rise in the merger rate with redshift and to study the statistical relations between close interacting galaxies and the field galaxy population. In paper I (1997ApJS..108...99D), we present the catalog of faint pairs and groups of galaxies of 46 equatorial fields taken with the Cerro Tololo Inter-American Observatory 4 m prime focus. The data set contains 73,988 galaxies, covering a total area of 2.23deg^2^. We have found 1751 isolated pairs and 30 groups of galaxies within 19 <Rmag<22 and 2"<{theta}<6" in this area. Our results clearly show an increase in pairs and groups of galaxies in comparison with a randomly generated catalog. We have completed the second part of an extensive survey of faint pairs and groups of galaxies in order to study galaxy evolution at intermediate redshifts. In paper II (1997ApJS..110..227D) we present the second catalog of faint interacting galaxies of 49 equatorial fields taken with the Cerro Tololo Inter-American Observatory 4 m prime focus camera. The data set contains 11,297 galaxies within 19<Rmag<22, covering a total area of 2.63deg^2^. We have found 1461 isolated pairs and 30 groups with separations 2"<{theta}<6". Our results confirm the excess of galaxies in pairs and groups found in the first catalog (Infante, de Mello, & Menanteau 1996ApJ...469L..85I; de Mello, Infante, & Menanteau 1997ApJS..108...99D). The two catalogs together cover an area of 4.86deg^2^ in the sky.
1043. Faint LSB galaxy cand. in Perseus cluster
ID:
ivo://CDS.VizieR/J/MNRAS/470/1512
Title:
Faint LSB galaxy cand. in Perseus cluster
Short Name:
J/MNRAS/470/1512
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the detection of 89 low surface brightness (LSB), and thus low stellar density galaxy candidates in the Perseus cluster core, of the kind named 'ultra-diffuse galaxies', with mean effective V-band surface brightnesses 24.8-27.1mag/arcsec^2^, total V-band magnitudes -11.8 to -15.5mag, and half-light radii 0.7-4.1kpc. The candidates have been identified in a deep mosaic covering 0.3deg^2^, based on wide-field imaging data obtained with the William Herschel Telescope. We find that the LSB galaxy population is depleted in the cluster centre and only very few LSB candidates have half-light radii larger than 3kpc. This appears consistent with an estimate of their tidal radius, which does not reach beyond the stellar extent even if we assume a high dark matter content (M/L=100). In fact, three of our candidates seem to be associated with tidal streams, which points to their current disruption. Given that published data on faint LSB candidates in the Coma cluster --with its comparable central density to Perseus-- show the same dearth of large objects in the core region, we conclude that these cannot survive the strong tides in the centres of massive clusters.
1044. Faint Markarian galaxies of SBS. III.
ID:
ivo://CDS.VizieR/J/AJ/124/1283
Title:
Faint Markarian galaxies of SBS. III.
Short Name:
J/AJ/124/1283
Date:
21 Oct 2021
Publisher:
CDS
Description:
We continue our program of spectroscopic observations of objects from the Second Byurakan Survey (SBS). This survey contains more than 3600 objects with m_pg_<19.5mag, half of them being galaxies and the other half being starlike objects. The aim of this work is to compile a complete sample of faint (B<17) Markarian galaxies. Here we present spectroscopic data for 185 galaxies, obtained with the 6m telescope of the Special Astrophysical Observatory in Russia and the 2.1m telescope of the Guillermo Haro Astrophysical Observatory in Mexico. In the present subsample, we find three new Seyfert 1 galaxies (SBS 0654+598, 1118+541, and 1320+551); one narrow-line Seyfert 1 (SBS 0748+499), one Seyfert 2 (SBS 0925+585), and three Seyfert2/LINER (SBS 0811+584, 1344+527, and 1428+529) galaxies; 12 LINERs; 13 blue compact dwarf galaxies; 65 starburst nuclei; 85 emission-line galaxies; and two absorption galaxies. Relevant astrophysical parameters (magnitude, redshift, relative intensities of emission lines, etc.) are given for the observed galaxies.
1045. Faint Object Camera
ID:
ivo://archive.stsci.edu/hst/foc
Title:
Faint Object Camera
Short Name:
HST.FOC
Date:
23 Jul 2020 19:48:27
Publisher:
Space Telescope Science Institute Archive
Description:
The Faint Object Camera (FOC) was one of the 4 original axial instruments on the Hubble Space Telescope (HST). FOC is used to make high-resolution observations of faint sources at UV and visible wavel
1046. Faint Object Spectrograph
ID:
ivo://archive.stsci.edu/hst/fos
Title:
Faint Object Spectrograph
Short Name:
HST.FOS
Date:
23 Jul 2020 19:48:53
Publisher:
Space Telescope Science Institute Archive
Description:
The Faint Object Spectrograph (FOS) was one of the 4 original axial instruments aboard the Hubble Space Telescope (HST). The FOS was designed to make spectroscopic observations of astrophysical sources from the near ultraviolet to the near infrared (1150 - 8000 Angstroms). The instrument was removed from HST during the Second Servicing Mission in February 1997.
1047. Faint radio sources in the NOAO Bootes field
ID:
ivo://CDS.VizieR/J/AJ/130/923
Title:
Faint radio sources in the NOAO Bootes field
Short Name:
J/AJ/130/923
Date:
21 Oct 2021
Publisher:
CDS
Description:
As a step toward investigating the parsec-scale properties of faint extragalactic radio sources, the Very Long Baseline Array (VLBA) was used at 5.0GHz to obtain phase-referenced images of 76 sources in the NOAO Bootes field. These 76 sources were selected from the Faint Images of the Radio Sky at Twenty cm (FIRST) catalog to have peak flux densities above 10mJy at 5" resolution and deconvolved major diameters of less than 3" at 1.4GHz. Of these faint radio sources, 57 were identified with accretion-powered radio galaxies and quasars brighter than 25.5mag in the optical I band. On Very Large Array (VLA) scales at 1.4GHz, a measure of the compactness of the faint sources (the ratio of the peak flux density from FIRST to the integrated flux density from the NRAO VLA Sky Survey catalog) spans the full range of possibilities arising from source-resolution effects.
1048. Faint red galaxies in Coma cluster spectroscopy
ID:
ivo://CDS.VizieR/J/MNRAS/392/1265
Title:
Faint red galaxies in Coma cluster spectroscopy
Short Name:
J/MNRAS/392/1265
Date:
21 Oct 2021
Publisher:
CDS
Description:
We investigate the stellar populations in a sample of 89 faint red galaxies in the Coma cluster, using high signal-to-noise ratio (S/N) spectroscopy from the 6.5-m MMT. Our sample is drawn from two 1{deg} fields, one centred on the cluster core and the other located 1{deg} to the south-west of the cluster centre. The target galaxies are mostly 2-4mag fainter than M*; galaxies with these luminosities have been previously studied only using small samples, or at low S/N. For a comparison sample we use published high-S/N data for red-sequence galaxies in the Shapley supercluster. We use state-of-the-art stellar population models (by R. Schiavon, Cat. <J/ApJS/171/146>) to interpret the absorption-line indices and infer the single-burst-equivalent age and metallicity (Fe/H) for each galaxy, as well as the abundances of the light elements Mg, Ca, C and N.
1049. Faint ring-shaped galaxies near South Pole
ID:
ivo://CDS.VizieR/J/A+AS/104/1
Title:
Faint ring-shaped galaxies near South Pole
Short Name:
J/A+AS/104/1
Date:
21 Oct 2021
Publisher:
CDS
Description:
A list of probable ring galaxies with a limiting magnitude of 17.5 has been prepared based on visual inspection of the film copies of the J SRC/ESO survey. About 88% of the sample of 125 selected objects seem to be new, hitherto unrecognized as ring galaxies. The candidate objects have been classified following the ring structure and the nucleus appearance.
1050. Faraday rotation at high Galactic latitude
ID:
ivo://CDS.VizieR/J/ApJ/714/1170
Title:
Faraday rotation at high Galactic latitude
Short Name:
J/ApJ/714/1170
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present a study of the vertical magnetic field of the Milky Way toward the Galactic poles, determined from observations of Faraday rotation toward more than 1000 polarized extragalactic radio sources at Galactic latitudes |b|>=77{deg}, using the Westerbork Radio Synthesis Telescope and the Australia Telescope Compact Array. We find median rotation measures (RMs) of 0.0+/-0.5rad/m^2^ and +6.3+/-0.7rad/m^2^ toward the north and south Galactic poles, respectively, demonstrating that there is no coherent vertical magnetic field in the Milky Way at the Sun's position. If this is a global property of the Milky Way's magnetism, then the lack of symmetry across the disk rules out pure dipole or quadrupole geometries for the Galactic magnetic field. The angular fluctuations in RM seen in our data show no preferred scale within the range ~0.1{deg} to ~25{deg}. The observed standard deviation in RM of ~9rad/m^2^ then implies an upper limit of ~1uG on the strength of the random magnetic field in the warm ionized medium at high Galactic latitudes.

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