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971. 2012 and 2017 light curves of asteroid 2012 TC4
ID:
ivo://CDS.VizieR/J/AJ/161/112
Title:
2012 and 2017 light curves of asteroid 2012 TC4
Short Name:
J/AJ/161/112
Date:
21 Oct 2021
Publisher:
CDS
Description:
Asteroid 2012TC4 is a small (~10m) near-Earth object that was observed during its Earth close approaches in 2012 and 2017. Earlier analyses of light curves revealed its excited rotation state. We collected all available photometric data from the two apparitions to reconstruct its rotation state and convex shape model. We show that light curves from 2012 and 2017 cannot be fitted with a single set of model parameters; the rotation and precession periods are significantly different for these two data sets, and they must have changed between or during the two apparitions. Nevertheless, we could fit all light curves with a dynamically self-consistent model assuming that the spin states of 2012TC4 in 2012 and 2017 were different. To interpret our results, we developed a numerical model of its spin evolution in which we included two potentially relevant perturbations: (I) gravitational torque due to the Sun and Earth and (II) radiation torque, known as the Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect. Despite our model simplicity, we found that the role of gravitational torques is negligible. Instead, we argue that the observed change of its spin state may be plausibly explained as a result of the YORP torque. To strengthen this interpretation, we verify that (I) the internal energy dissipation due to material inelasticity and (II) an impact with a sufficiently large interplanetary particle are both highly unlikely causes of its observed spin state change. If true, this is the first case where the YORP effect has been detected for a tumbling body.
972. 1.4 and 3.4mm interferometry of W3 IRS5
ID:
ivo://CDS.VizieR/J/A+A/490/213
Title:
1.4 and 3.4mm interferometry of W3 IRS5
Short Name:
J/A+A/490/213
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the results of PdBI 1.4 and 3.4mm interferometric observations of the high-mass star-forming region W3 IRS5 in the AB configurations. From the continuum maps we identified five individual sources with counterparts in the NIR, MIR or radio (Q-band), except for one source that is a new identification. Three of the sources are within the inner 2100AU, where the protostellar number density exceeds 10^6^ protostars pc^-3^ assuming spherical symmetry. Lower limits for the circumstellar masses of the sources range from ~0.3 to ~40M_{sun}_ although they were strongly affected by the spatial filtering of the interferometer. We mapped the SiO(2-1), SiO(5-4), SO2(22-22), and SO2(8-9) molecular transitions. We identify five molecular outflows in SiO, two of them nearly in the line of sight direction. The SO2 velocity structure indicates a rotating, bound system, and we find tentative signatures of converging flows as predicted by the gravoturbulent star formation and converging flow theories. The obtained data strongly indicate that the clustered environment has a major influence on the formation of high-mass stars; however, our data do not clearly allow us to distinguish whether the ongoing star-forming process follows a monolithic collapse or a competitive accretion mechanism.
973. 3.5 and 1.3mm polarimetric survey of Northern AGNs
ID:
ivo://CDS.VizieR/J/A+A/566/A59
Title:
3.5 and 1.3mm polarimetric survey of Northern AGNs
Short Name:
J/A+A/566/A59
Date:
21 Oct 2021
Publisher:
CDS
Description:
Short millimeter observations of radio-loud active galactic nuclei (AGN) offer an excellent opportunity to study the physics of their synchrotron-emitting relativistic jets from where the bulk of radio and millimeter emission is radiated. On one hand, AGN jets and their emission cores are significantly less affected by Faraday rotation and depolarization than at longer wavelengths. On the other hand, the millimeter emission of AGN is dominated by the compact innermost regions in the jets, where the jet cannot be seen at longer wavelengths due to synchrotron opacity. We present the first simultaneous dual frequency 86GHz and 229GHz polarimetric survey of all four Stokes parameters for a large sample of 211 radio-loud active galactic nuclei, designed to be flux limited at 1Jy at 86GHz. Most of the observations were made in mid-August 2010 using the XPOL polarimeter on the IRAM 30m millimetric radio telescope.
974. 1.3 and 2mm survey of IRC+10216
ID:
ivo://CDS.VizieR/J/ApJS/177/275
Title:
1.3 and 2mm survey of IRC+10216
Short Name:
J/ApJS/177/275
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the results of our spectral line surveys in the 1.3 and 2mm windows toward the carbon-rich envelope of IRC+10216. There were 377 lines detected in total, of which 360 lines are assigned to 57 known molecules (including 29 rare isotopomers and two cyclic isomers). Only 17 weak lines remain unidentified. Rotational lines of isotopomers ^13^CCH and HN^13^C are detected for the first time in IRC+10216 . The detection of the formaldehyde lines in this star is also confirmed. Possible abundance differences among the three ^13^C-substituted isotopic isomers of HC_3_N is reported. Isotopic ratios of C and O are confirmed to be nonsolar while those of S and Si to be nearly solar. Column densities have been estimated for 15 molecular species. Modified spectroscopic parameters have been calculated for NaCN, Na^13^CN, KCN, and SiC_2_. Transition frequencies from the present observations were used to improve the spectroscopic parameters of Si^13^CC, ^29^SiC_2_, and ^30^SiC_2_.
975. Andromeda XIX member stars
ID:
ivo://CDS.VizieR/J/MNRAS/491/3496
Title:
Andromeda XIX member stars
Short Name:
J/MNRAS/491/3496
Date:
21 Oct 2021
Publisher:
CDS
Description:
With a central surface brightness of {mu}_0_=29.3mag/arcsec^2^, and half-light radius of r_half_=3.1^+0.9^_-1.1_kpc, Andromeda XIX (And XIX) is an extremely diffuse satellite of Andromeda. We present spectra for ~100 red giant branch stars in this galaxy, plus 16 stars in a nearby stellar stream. With this exquisite data set, we re-derive the properties of And XIX, measuring a systemic velocity of <v_r_>=-109.0+/-1.6km/s and a velocity dispersion of {sigma}_vr_=7.8^+1.7^_-1.5_km/s (higher than derived in our previous work). We marginally detect a velocity gradient along the major axis of dv/dX=-2.1+/-1.8km/s/kpc. We find its mass-to-light ratio is higher than galaxies of comparable stellar mass ([M/L]_half_=278^+146^_-198_M_{sun}_/L_{sun}_), but its dynamics place it in a halo with a similar total mass to these galaxies. This could suggest that And XIX is a 'puffed up' dwarf galaxy, whose properties have been altered by tidal processes, similar to its Milky Way counterpart, Antlia II. For the nearby stream, we measure v_r_=-279.2+/-3.7km/s, and {sigma}_rv_=13.8^+3.5^_-2.6_km/s. We measure its metallicity, and find it to be more metal rich than And XIX, implying that the two features are unrelated. Finally, And XIX's dynamical and structural properties imply it is a local analogue to ultradiffuse galaxies (UDGs). Its complex dynamics suggest that the masses of distant UDGs measured from velocity dispersions alone should be carefully interpreted.
976. 100 and 160um fluxes of nearby galaxies
ID:
ivo://CDS.VizieR/J/MNRAS/440/942
Title:
100 and 160um fluxes of nearby galaxies
Short Name:
J/MNRAS/440/942
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present Herschel/PACS 100 and 160{mu}m integrated photometry for the 323 galaxies in the Herschel Reference Survey (HRS), a K-band, volume-limited sample of galaxies in the local Universe. Once combined with the Herschel/SPIRE observations already available, these data make the HRS the largest representative sample of nearby galaxies with homogeneous coverage across the 100-500{mu}m wavelength range. In this paper, we take advantage of this unique data set to investigate the properties and shape of the far-infrared/submillimetre spectral energy distribution in nearby galaxies. We show that, in the stellar mass range covered by the HRS (8<~log(M*/M_{sun}_)<~12), the far-infrared/submillimetre colours are inconsistent with a single modified blackbody having the same dust emissivity index {beta} for all galaxies. In particular, either {beta} decreases or multiple temperature components are needed, when moving from metal-rich/gas-poor to metal-poor/gas-rich galaxies. We thus investigate how the dust temperature and mass obtained from a single modified blackbody depend on the assumptions made on {beta}. We show that, while the correlations between dust temperature, galaxy structure and star formation rate are strongly model dependent, the dust mass scaling relations are much more reliable, and variations of {beta} only change the strength of the observed trends.
977. A new catalog of 53522 4.85GHz sources
ID:
ivo://CDS.VizieR/VIII/13
Title:
A new catalog of 53522 4.85GHz sources
Short Name:
VIII/13
Date:
21 Oct 2021
Publisher:
CDS
Description:
of paper: A catalog of 53522 4.85GHz sources between 0 and 75 degrees declination has been generated from observations taken with the NRAO Green Blank 300foot (91m) telescope. The flux limit of the catalog is dependent on declination and ranges from about 40mJy at 0degree to 20mJy at 60degrees. The source positions given in the catalog have a 95% confidence radius of about 50arcsec. Spectral indices have been calculated for 29051 sources which have counterparts in the Texas 365MHz northern sky survey.
978. A new catalog of HII regions in M31
ID:
ivo://CDS.VizieR/J/AJ/142/139
Title:
A new catalog of HII regions in M31
Short Name:
J/AJ/142/139
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present a new catalog of HII regions in M31. The full disk of the galaxy (~24kpc from the galaxy center) is covered in a 2.2deg^2^ mosaic of 10 fields observed with the Mosaic Camera on the Mayall 4m telescope as part of the Local Group Galaxies survey.
979. A new 95GHz methanol maser catalog. I.
ID:
ivo://CDS.VizieR/J/ApJS/231/20
Title:
A new 95GHz methanol maser catalog. I.
Short Name:
J/ApJS/231/20
Date:
21 Oct 2021
Publisher:
CDS
Description:
The Purple Mountain Observatory 13.7m radio telescope has been used to search for 95GHz (8_0_-7_1_A^+^) class I methanol masers toward 1020 Bolocam Galactic Plane Survey (BGPS) sources, leading to 213 detections. We have compared the line width of the methanol and HCO^+^ thermal emission in all of the methanol detections, and on that basis, we find that 205 of the 213 detections are very likely to be masers. This corresponds to an overall detection rate of 95 GHz methanol masers toward our BGPS sample of 20%. Of the 205 detected masers, 144 (70%) are new discoveries. Combining our results with those of previous 95GHz methanol maser searches, a total of 481 95GHz methanol masers are now known. We have compiled a catalog listing the locations and properties of all known 95GHz methanol masers.
980. A new IR study of intrinsic and extrinsic S-type stars
ID:
ivo://CDS.VizieR/J/AJ/158/22
Title:
A new IR study of intrinsic and extrinsic S-type stars
Short Name:
J/AJ/158/22
Date:
21 Oct 2021
Publisher:
CDS
Description:
We collect all known intrinsic and extrinsic S-type stars to discuss their infrared properties and find their difference in the infrared using photometric data from the Two Micron All Sky Survey, Wide Field Infrared Survey Explorer, and Infrared Astronomical Satellite missions. Then we look for the diagnosis to extract intrinsic S-type stars from the large unclassified sample. We found that, statistically, intrinsic S-type stars have larger infrared excesses than extrinsic S-type stars in the wavelength region of 1-60 {mu}m due to thicker dusty circumstellar envelopes. We also found that only intrinsic S-type stars occupy the reddest color areas in all of the two-color diagrams we presented. Finally, 172 new intrinsic S-type stars are presented in this paper. This makes the number of known intrinsic S-type stars almost double. In addition, some intrinsic and extrinsic S-type stars have power-law distributions in some two-color diagrams with the wavelength longer than 5 {mu}m. The possible reason for this is also discussed.

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