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Start Over Subject proper motions Subject radio astronomy
1. Absolute polarimetry observations of 33 pulsars
ID:
ivo://CDS.VizieR/J/MNRAS/453/4485
Title:
Absolute polarimetry observations of 33 pulsars
Short Name:
J/MNRAS/453/4485
Date:
21 Oct 2021
Publisher:
CDS
Description:
Absolute polarimetry observations of 33 pulsars were carried out with the Green Bank Telescope in the 1100-1900 MHz band using the Green Bank Ultimate Pulsar Processing Instrument. This group was selected to help complete a larger sample for which accurate proper-motion measurements were available. A combination of profile analysis using the core/double cone model and polarization-angle fitting methods were applied to estimate the "fiducial" longitude of the magnetic axis for each star and refer the linear polarization angle at that point to infinite frequency. As had been found previously, a number of the pulsars are found to have fiducial polarization directions that fall either along or at right angles to their proper-motion directions, whereas upwards of a third of the stars studied show alignments that are neither parallel nor orthogonal.
2. An astrometric catalogue of radio stars
ID:
ivo://CDS.VizieR/V/67
Title:
An astrometric catalogue of radio stars
Short Name:
V/67
Date:
21 Oct 2021
Publisher:
CDS
Description:
Astrometric data in the optical and radio spectral ranges have been assembled for some 200 radio stars which are considered promising objects for linkage of optical and radio frames. Astrophysical data have been added to support observational programmes and data analysis. The full catalogue, in its original form as the file "catalog.ori", contains explanations, followed by the data for each star organised as paragraphs (blocks of lines separated by a blank line). Each paragraph representing a radio star in this catalog consists of 17 categories of stellar parameters; each category may contain zero, one, or more records. The positions, proper motions and parallaxes in the optical and radio domains are assigned categories 1 to 7; categories 8 to 13 deal with photometrical and spectroscopical parameters, duplicity and variability descriptions; and categories 14 to 17 contain references to finding charts and radio maps, as well as remarks about observation priorities. A detailed description of these categories are present at the beginning of the "catalog.ori" file.
3. ATNF Pulsar Catalogue
ID:
ivo://CDS.VizieR/B/psr
Title:
ATNF Pulsar Catalogue
Short Name:
B/psr
Date:
21 Oct 2021
Publisher:
CDS
Description:
The catalogue is a compilation of the principal observed parameters of pulsars, including positions, timing parameters, pulse widths, flux densities, proper motions, distances, and dispersion, rotation, and scattering measures. It also lists the orbital elements of binary pulsars, and some commonly used parameters derived from the basic measurements. The catalogue includes all published rotation-powered pulsars, including those detected only at high energies. It also includes Anomalous X-ray Pulsars (AXPs) and Soft Gamma-ray Repeaters (SGRs) for which coherent pulsations have been detected. However, it excludes accretion-powered pulsars such as Her X-1 and the recently discovered X-ray millisecond pulsars.
4. A VLA survey of magnetic CVs. I. The data
ID:
ivo://CDS.VizieR/J/AJ/154/252
Title:
A VLA survey of magnetic CVs. I. The data
Short Name:
J/AJ/154/252
Date:
21 Oct 2021
Publisher:
CDS
Description:
The Jansky Very Large Array was used to observe 121 magnetic cataclysmic variables (MCVs). We report radio detections of 18 stars. Thirteen are new radio sources, increasing the number of MCVs that are radio sources by more than twofold, from 8 to 21. Most detections are at 8.7 GHz (X-band) with a lesser number at 5.4 and 21.1 GHz (C- and K-bands). With the exception of AE Aqr, whose flux density is typically >5 mJy, the flux densities are in the range of 24-780 {mu}Jy. Thirteen of the detections show highly circularly polarized emission, which is characteristic of electron-cyclotron maser emission. The data suggest that MCVs could possibly be divided into two classes of radio emitters: those dominated by weakly polarized gyrosynchrotron emission and those by highly polarized electron-cyclotron maser emission.
5. BL Lac from SDSS
ID:
ivo://CDS.VizieR/J/AJ/129/2542
Title:
BL Lac from SDSS
Short Name:
J/AJ/129/2542
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present a sample of 386 BL Lacertae candidates identified from 2860deg^2^ of the Sloan Digital Sky Survey (SDSS) spectroscopic database. The candidates are primarily selected to have quasi-featureless optical spectra and low proper motions as measured from SDSS and USNO-B positions; however, our ability to separate Galactic from extragalactic quasi-featureless objects (QFOs) on the basis of proper motion alone is limited by the lack of reliable proper motion measurements for faint objects. Based largely on this remarkably clean color separation, we subdivide the sample into 240 probable candidates and 146 additional less probable (likely stellar) candidates.
6. Galactic rotation curve from selected maser
ID:
ivo://CDS.VizieR/J/PAZh/37/281
Title:
Galactic rotation curve from selected maser
Short Name:
J/PAZh/37/281
Date:
21 Oct 2021
Publisher:
CDS
Description:
Based on currently available observations of 28 maser sources in 25 star-forming regions with measured trigonometric parallaxes, proper motions, and radial velocities, we have constructed the rotation curve of the Galaxy. Taking different distances to the Galactic center R_0_, we have estimated the peculiar velocity of the Sun, the angular velocity of Galactic rotation, and its three derivatives.
7. GOBELINS. IV. VLBA obs. of Taurus
ID:
ivo://CDS.VizieR/J/ApJ/859/33
Title:
GOBELINS. IV. VLBA obs. of Taurus
Short Name:
J/ApJ/859/33
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present new trigonometric parallaxes and proper motions of young stellar objects in the Taurus molecular cloud complex from observations collected with the Very Long Baseline Array as part of the Gould's Belt Distances Survey. We detected 26 young stellar objects and derived trigonometric parallaxes for 18 stars with an accuracy of 0.3% to a few percent. We modeled the orbits of six binaries and determined the dynamical masses of the individual components in four of these systems (V1023 Tau, T Tau S, V807 Tau, and V1000 Tau). Our results are consistent with the first trigonometric parallaxes delivered by the Gaia satellite and reveal the existence of significant depth effects. We find that the central portion of the dark cloud Lynds 1495 is located at d=129.5+/-0.3pc, while the B216 clump in the filamentary structure connected to it is at d=158.1+/-1.2pc. The closest and remotest stars in our sample are located at d=126.6+/-1.7pc and d=162.7+/-0.8pc, yielding a distance difference of about 36pc. We also provide a new distance estimate for HL Tau that was recently imaged. Finally, we compute the spatial velocity of the stars with published radial velocity and investigate the kinematic properties of the various clouds and gas structures in this region.
8. Gould's Belt Distances Survey (GOBELINS). II. OMC
ID:
ivo://CDS.VizieR/J/ApJ/834/142
Title:
Gould's Belt Distances Survey (GOBELINS). II. OMC
Short Name:
J/ApJ/834/142
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the results of the Gould's Belt Distances Survey of young star-forming regions toward the Orion Molecular Cloud Complex. We detected 36 young stellar objects (YSOs) with the Very Large Baseline Array, 27 of which have been observed in at least three epochs over the course of two years. At least half of these YSOs belong to multiple systems. We obtained parallax and proper motions toward these stars to study the structure and kinematics of the Complex. We measured a distance of 388+/-5pc toward the Orion Nebula Cluster, 428+/-10pc toward the southern portion L1641, 388+/-10pc toward NGC 2068, and roughly ~420pc toward NGC 2024. Finally, we observed a strong degree of plasma radio scattering toward {lambda} Ori.
9. H2O maser emissions of IRAS 19134+2131
ID:
ivo://CDS.VizieR/J/ApJ/669/424
Title:
H2O maser emissions of IRAS 19134+2131
Short Name:
J/ApJ/669/424
Date:
21 Oct 2021
Publisher:
CDS
Description:
Using the Very Long Baseline Array at six epochs, we have observed H_2_O maser emission in the preplanetary nebula IRAS 19134+2131 (I19134), in which the H_2_O maser spectrum has two groups of emission features separated in radial velocity by ~100km/s. We also obtained optical images of I19134 with the Hubble Space Telescope to locate the bipolar reflection nebula in this source for the first time.
10. IC 133 water vapor maser
ID:
ivo://CDS.VizieR/J/ApJ/615/702
Title:
IC 133 water vapor maser
Short Name:
J/ApJ/615/702
Date:
21 Oct 2021
Publisher:
CDS
Description:
We report on the results of a 14yr long VLBI study of proper motions in the IC 133 H_2_O maser source in the galaxy M33.

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