Search Publications
Jupiter-like planets might be common in a low-density environment
D'Orazi, Valentina; Zurlo, Alice; Gratton, Raffaele +6 more
Radial velocity surveys suggest that the Solar System may be unusual and that Jupiter-like planets have a frequency < 20% around solar-type stars. However, they may be much more common in one of the closest associations in the solar neighbourhood. Young moving stellar groups are the best targets for direct imaging of exoplanets and four massive…
Exploring the evolution of dust temperature using spectral energy distribution fitting in a large photometric survey
Stanway, Elizabeth R.; Jones, Gareth T.
Panchromatic analysis of galaxy spectral energy distributions, spanning from the ultraviolet to the far-infrared, probes not only the stellar population but also the properties of interstellar dust through its extinction and long-wavelength re-emission. However, little work has exploited the full power of such fitting to constrain the redshift evo…
TIC 43152097 The first eclipsing binary in NGC 2232
Vallenari, A.; Bragaglia, A.; D'Orazi, V. +5 more
We report the discovery of a low-mass totally eclipsing system in the young (age ≃ 28 Myr) open cluster NGC 2232, during an examination of their TESS photometry. The follow-up study of this detached system, TIC 43152097, is based on photometry and high-resolution spectra from the literature and collected by us. The radial velocity of the center of…
The globular cluster system of the nearest Seyfert II galaxy Circinus
Minniti, D.; Alonso-García, J.; Gómez, M. +7 more
Context. The globular cluster (GC) system of Circinus galaxy has not been probed previously partly because of the location of the galaxy at −3.8° Galactic latitude, which suffers severely from interstellar extinction, stellar crowding, and Galactic foreground contamination. However, the deep near-infrared (NIR) photometry by the VISTA Variables in…
Harnessing the Hubble Space Telescope Archives: A Catalog of 21,926 Interacting Galaxies
Mantha, Kameswara Bharadwaj; Simmons, Brooke D.; Merín, Bruno +13 more
Mergers play a complex role in galaxy formation and evolution. Continuing to improve our understanding of these systems requires ever larger samples, which can be difficult (even impossible) to select from individual surveys. We use the new platform ESA Datalabs to assemble a catalog of interacting galaxies from the Hubble Space Telescope science …
XTE J1906+090: a persistent low-luminosity Be X-ray binary
Sidoli, L.; La Palombara, N.; Bird, A. J. +1 more
We present new results from INTEGRAL and Swift observations of the hitherto poorly studied and unidentified X-ray source XTE J1906+090. A bright hard X-ray outburst (luminosity of ~1036 erg s-1 above 20 keV) has been discovered with INTEGRAL observations in 2010, this being the fourth outburst ever detected from the source. S…
The MUSE Ultra Deep Field (MUDF). IV. A pair of X-ray weak quasars at the heart of two extended Lyα nebulae
Haardt, Francesco; Rafelski, Marc; Lusso, Elisabeta +10 more
We present the results obtained from follow-up observations of the MUSE Ultra Deep Field (MUDF) at X-ray energies with XMM-Newton. The MUDF is centred on a unique field with two bright, physically associated quasars at z ≃ 3.23, separated by ~500 kpc in projection. Both quasars are embedded within extended Lyα nebulae (${\gtrsim}100\,{\rm kpc}$ at…
Long-Lived and Continual Volcanic Eruptions, Tectonic Activity, Pit Chains Formation, and Boulder Avalanches in Northern Tharsis Region: Implications for Late Amazonian Geodynamics and Seismo-Tectonic Processes on Mars
Kumar, P. Senthil; Krishnan, Vivek
Tharsis is the largest volcanic province on Mars. It consists of a few large shield volcanoes, one of which is Alba Mons (AM), located in northern Tharsis, with the Ceraunius Fossae (CF) graben system to the south of it. Previous workers argued in favor of episodic building of Tharsis volcanoes. In contrast, we show that volcanism in the AM and CF…
Morphology of Star-forming Clumps in Ram-pressure Stripped Galaxies as Seen by HST
Scarlata, Claudia; Calzetti, Daniela; Vulcani, Benedetta +9 more
We characterize the morphological properties of a statistically relevant sample of Hα and UV young star-forming clumps and optical complexes, observed with the Hubble Space Telescope in six galaxies of the GASP sample undergoing ram pressure stripping. The catalogs comprise 2406 (323 in the tails) Hα clumps, 3750 (899) UV clumps, and 424 tail opti…
The spectroscopic orbit of HD 168112 A,B in NGC 6604: another massive binary target for interferometry
Simón-Díaz, S.; Gamen, R.; Maíz Apellániz, J. +8 more
We present the first spectroscopic orbit of the O-type double-lined star HD 168112 A,B. We analyse 101 high-resolution optical spectra identifying the absorption lines of both components. The orbital solution presents a relatively long period, P = 513.52 ± 0.01 d, and a high eccentricity, e = 0.743 ± 0.005. The binary system consists of two very s…