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Pulsational properties of ten new slowly pulsating B stars
Paunzen, E.; Fedurco, M.; Bernhard, K. +2 more
Context. Slowly pulsating B (SPB) stars are upper main-sequence multi-periodic pulsators that show non-radial g-mode oscillations driven by the κ mechanism acting on the iron bump. These multi-periodic pulsators have great asteroseismic potential and can be employed for the calibration of stellar structure and evolution models of massive stars.
Resolved observations at 31 GHz of spinning dust emissivity variations in ρ Oph
Bond, J. Richard; Hensley, Brandon S.; Casassus, Simon +9 more
The ρ Oph molecular cloud is one of the best examples of spinning dust emission, first detected by the cosmic background imager (CBI). Here, we present 4.5 arcmin observations with CBI 2 that confirm 31 GHz emission from ρ Oph W, the PDR exposed to B-type star HD 147889, and highlight the absence of signal from S1, the brightest IR nebula in the c…
Exploratory Spectroscopy of Magnetic Cataclysmic Variables Candidates and Other Variable Objects. II
Oliveira, A. S.; Rodrigues, C. V.; Martins, M. +4 more
This is the second paper of a series presenting our search for magnetic cataclysmic variables (mCVs) among candidates selected mostly from the Catalina Real-Time Transient Survey. We present the identification spectra, obtained at the SOAR Telescope, as well as magnitudes and Gaia distances for 45 objects. Of these, 39 objects are identified as CV…
Extreme ultraviolet quasar colours from GALEX observations of the SDSS DR14Q catalogue
Wu, Jian; Vanden Berk, Daniel E.; Wesolowski, Sarah C. +4 more
The rest-frame far to extreme ultraviolet (UV) colour-redshift relationship has been constructed from data on over $480\, 000$ quasars carefully cross-matched between SDSS Data Release 14 and the final GALEX photometric catalogue. UV matching and detection probabilities are given for all the quasars, including dependencies on separation, optical b…
Feedback of molecular outflows from protostars in NGC 1333 revealed by Herschel and Spitzer spectro-imaging observations
Güdel, Manuel; Persson, Magnus; Tafalla, Mario +2 more
Context. Far infrared cooling of excited gas around protostars has been predominantly studied in the context of pointed observations. Large-scale spectral maps of star forming regions enable the simultaneous, comparative study of the gas excitation around an ensemble of sources at a common frame of reference, therefore, providing direct insights i…
Gas and star formation from HD and dust emission in a strongly lensed galaxy
Maiolino, R.; Caselli, P.; Carniani, S. +1 more
The molecular gas content of high-redshift galaxies is a highly sought-after property. However, H2 is not directly observable in most environments, so its mass is probed through other emission lines (e.g. CO, [C I], [C II]), or through a gas-to-dust ratio. Each of these methods depends on several assumptions, and are best used in parall…
Clustering of Fast Coronal Mass Ejections during Solar Cycles 23 and 24 and the Implications for CME-CME Interactions
Veronig, Astrid; Podladchikova, Tatiana; Feynman, Joan +3 more
We study the clustering properties of fast coronal mass ejections (CMEs) that occurred during solar cycles 23 and 24. We apply two methods: the Max Spectrum method can detect the predominant clusters, and the declustering threshold time method provides details on the typical clustering properties and timescales. Our analysis shows that during the …
Component properties and mutual orbit of binary main-belt comet 288P/(300163) 2006 VW139
Agarwal, J.; Weaver, H.; Larson, S. +3 more
Context. The binary asteroid 288P/(300163) is unusual both for its combination of wide-separation and high mass ratio and for its comet-like activity. It is not currently known whether there is a causal connection between the activity and the unusual orbit or if instead the activity helped to overcome a strong detection bias against such sub-arcse…
Illuminating a tadpole's metamorphosis II: observing the ongoing transformation with ALMA
Reiter, Megan; Garay, Guido; McLeod, Anna F. +4 more
We present new Atacama Large Millimeter/submillimeter Array observations of the tadpole, a small globule in the Carina Nebula that hosts the HH 900 jet+outflow system. Our data include 12CO, 13CO, C18O J=2-1, 13CO, C18O J=3-2, and serendipitous detections of DCN J=3-2 and CS J=7-6. With angula…
Two successive partial mini-filament confined ejections
Mandrini, C. H.; Cristiani, G. D.; López Fuentes, M. +2 more
Active region (AR) NOAA 11476 produced a series of confined plasma ejections, mostly accompanied by flares of X-ray class M, from 08 to 10 May 2012. The structure and evolution of the confined ejections resemble that of EUV surges; however, their origin is associated to the destabilization and eruption of a mini-filament, which lay along the photo…