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Evidence for (and Against) Progenitor Bias in the Size Growth of Compact Red Galaxies
Newman, Jeffrey; Graves, Genevieve; Abraham, Roberto G. +5 more
Most massive, passive galaxies are compact at high redshifts, but similarly compact massive galaxies are rare in the local universe. The most common interpretation of this phenomenon is that massive galaxies have grown in size by a factor of about five since redshift z = 2. An alternative explanation is that recently quenched massive galaxies are …
Instantaneous three-dimensional thermal structure of the South Polar Vortex of Venus
Hueso, R.; Sánchez-Lavega, A.; García Muñoz, A. +1 more
The Venus thermal radiation spectrum exhibits the signature of CO2 absorption bands. By means of inversion techniques, those bands enable the retrieval of atmospheric temperature profiles. We have analyzed VIRTIS-M-IR night-side data obtaining high-resolution thermal maps of the Venus south polar region between 55 and 85 km altitudes. T…
3C 57 as an atypical radio-loud quasar: implications for the radio-loud/radio-quiet dichotomy
Marziani, P.; Stirpe, G. M.; del Olmo, A. +4 more
Lobe-dominated radio-loud (LD RL) quasars occupy a restricted domain in the 4D Eigenvector 1 (4DE1) parameter space which implies restricted geometry/physics/kinematics for this subclass compared to the radio-quiet (RQ) majority of quasars. We discuss how this restricted domain for the LD RL parent population supports the notion for a RQ-RL dichot…
Location and sizes of forsterite grains in protoplanetary disks. Interpretation from the Herschel DIGIT programme
Waters, L. B. F. M.; Dominik, C.; Tielens, A. G. G. M. +4 more
Context. The spectra of protoplanetary disks contain mid- and far- infrared emission features produced by forsterite dust grains. The spectral features contain information about the forsterite temperature, chemical composition and grain size.
Aims: We aim to characterize how the 23 and 69 µm features can be used to constrain the physica…
Hyper: Hybrid photometry and extraction routine
Pezzuto, S.; Fuller, G. A.; Traficante, A. +1 more
We present a new hybrid photometry and extraction routine called Hyper. It is designed to do compact source photometry, allowing for varying spatial resolution and sensitivity in multi-wavelength surveys. Hyper combines multi-Gaussian fitting with aperture photometry to provide reliable photometry in regions with variable backgrounds and in crowde…
BEER analysis of Kepler and CoRoT light curves. III. Spectroscopic confirmation of seventy new beaming binaries discovered in CoRoT light curves
Mazeh, T.; Tal-Or, L.; Faigler, S.
Context. The BEER algorithm searches stellar light curves for the BEaming, Ellipsoidal, and Reflection photometric modulations that are caused by a short-period companion. These three effects are typically of very low amplitude and can mainly be detected in light curves from space-based photometers. Unlike eclipsing binaries, these effects are not…
LUT Reveals a New Mass-transferring Semi-detached Binary
Zhang, J.; Zejda, M.; Zhang, B. +6 more
GQ Dra is a short-period eclipsing binary in a double stellar system that was discovered by Hipparcos. Complete light curves in the UV band were obtained with the Lunar-based Ultraviolet Telescope in 2014 November and December. Photometric solutions are determined using the W-D (Wilson and Devinney) method. It is discovered that GQ Dra is a classi…
Relationship between X-ray spectral index and X-ray Eddington ratio for Mrk 335 and Ark 564
Misra, R.; Tripathi, S.; Pathak, A. +3 more
We present a comprehensive flux-resolved spectral analysis of the bright narrow-line Seyfert 1 AGNs, Mrk 335 and Ark 564 using observations by XMM-Newton satellite. The mean and the flux-resolved spectra are fitted by an empirical model consisting of two Comptonization components, one for the low-energy soft excess and the other for the high-energ…
Discovery of near-ultraviolet counterparts to millisecond pulsars in the globular cluster 47 Tucanae
Wijnands, R.; Rivera-Sandoval, L. E.; van den Berg, M. +11 more
We report the discovery of the likely white dwarf companions to radio millisecond pulsars 47 Tuc Q and 47 Tuc S in the globular cluster 47 Tucanae. These blue stars were found in near-ultraviolet images from the Hubble Space Telescope for which we derived accurate absolute astrometry, and are located at positions consistent with the radio coordina…
Space weather effects on the bow shock, the magnetic barrier, and the ion composition boundary at Venus
Kallio, E.; Szego, K.; Fraenz, M. +4 more
We present a statistical study on the interaction between interplanetary coronal mass ejections (ICMEs) and the induced magnetosphere of Venus when the peak magnetic field of the magnetic barrier was anomalously large (>65 nT). Based on the entire available Venus Express data set from April 2006 to October 2014, we selected 42 events and analyz…