Search Publications
Hubble Space Telescope search for the transit of the Earth-mass exoplanet α Centauri B b
Chaplin, William J.; Seager, Sara; Günther, Maximilian N. +13 more
Results from exoplanet surveys indicate that small planets (super-Earth size and below) are abundant in our Galaxy. However, little is known about their interiors and atmospheres. There is therefore a need to find small planets transiting bright stars, which would enable a detailed characterization of this population of objects. We present the res…
Hierarchical star formation across the ring galaxy NGC 6503
Gouliermis, Dimitrios A.; Grebel, Eva K.; Smith, Linda J. +25 more
We present a detailed clustering analysis of the young stellar population across the star-forming ring galaxy NGC 6503, based on the deep Hubble Space Telescope photometry obtained with the Legacy ExtraGalactic UV Survey. We apply a contour-based map analysis technique and identify in the stellar surface density map 244 distinct star-forming struc…
One Thousand New Dwarf Novae from the OGLE Survey
Soszyński, I.; Udalski, A.; Szymański, M. K. +7 more
We present one of the largest collections of dwarf novae (DNe) containing 1091 objects that have been discovered in the long-term photometric data from the Optical Gravitational Lensing Experiment (OGLE) survey. They were found in the OGLE fields toward the Galactic bulge and the Magellanic Clouds. We analyze basic photometric properties of all sy…
Coordinated Hubble Space Telescope and Venus Express Observations of Venus' upper cloud deck
Bertaux, Jean-Loup; Marcq, Emmanuel; Wilson, Colin +10 more
Hubble Space Telescope Imaging Spectrograph (HST/STIS) UV observations of Venus' upper cloud tops were obtained between 20N and 40S latitude on December 28, 2010; January 22, 2011 and January 27, 2011 in coordination with the Venus Express (VEx) mission. The high spectral (0.27 nm) and spatial (40-60 km/pixel) resolution HST/STIS data provide the …
Large-scale Contraction and Subsequent Disruption of Coronal Loops During Various Phases of the M6.2 Flare Associated with the Confined Flux Rope Eruption
Kushwaha, Upendra; Joshi, Bhuwan; Veronig, Astrid M. +1 more
We investigate evolutionary phases of an M6.2 flare and the associated confined eruption of a prominence. The pre-flare phase exhibits spectacular large-scale contraction of overlying extreme ultraviolet (EUV) coronal loops during which the loop system was subjected to an altitude decrease of ∼20 Mm (40% of the initial height) for an extended span…
High-lying OH Absorption, [C II] Deficits, and Extreme L FIR/M H2 Ratios in Galaxies
Lutz, D.; Genzel, R.; Poglitsch, A. +22 more
Herschel/PACS observations of 29 local (ultra)luminous infrared galaxies, including both starburst and active galactic nucleus (AGN) dominated sources as diagnosed in the mid-infrared/optical, show that the equivalent width of the absorbing OH 65 µm Π3/2 J = 9/2-7/2 line (W eq(OH65)) with lower level energy E low
Driving Solar Spicules and Jets with Magnetohydrodynamic Turbulence: Testing a Persistent Idea
Cranmer, Steven R.; Woolsey, Lauren N.
The solar chromosphere contains thin, highly dynamic strands of plasma known as spicules. Recently, it has been suggested that the smallest and fastest (Type II) spicules are identical to intermittent jets observed by the Interface Region Imaging Spectrograph. These jets appear to expand out along open magnetic field lines rooted in unipolar netwo…
Chemical Analysis of Asymptotic Giant Branch Stars in M62
Dalessandro, E.; Massari, D.; Mucciarelli, A. +4 more
We have collected UVES-FLAMES high-resolution spectra for a sample of 6 asymptotic giant branch (AGB) and 13 red giant branch (RGB) stars in the Galactic globular cluster (GC) M62 (NGC 6266). Here we present the detailed abundance analysis of iron, titanium, and light elements (O, Na, Mg, and Al). For the majority (five out of six) of the AGB targ…
A Compton-thin solution for the Suzaku X-ray spectrum of the Seyfert 2 galaxy Mkn 3
Turner, T. J.; Yaqoob, T.; Tatum, M. M. +2 more
Mkn 3 is a Seyfert 2 galaxy that is widely regarded as an exemplary Compton-thick Active Galactic Nucleus (AGN). We study the Suzaku X-ray spectrum using models of the X-ray reprocessor that self-consistently account for the Fe Kα fluorescent emission line and the associated Compton-scattered, or reflection, continuum. We find a solution in which …
Resolving structure of the disc around HD100546 at 7 mm with ATCA
Wilner, D. J.; van Dishoeck, E. F.; Pinilla, P. +7 more
There is much evidence that planet formation is occurring in the disc around the Herbig Be star HD100546. To learn more about the processes occurring in this disc, we conducted high-resolution imaging at 43/45 GHz with the Australia Telescope Compact Array. Multiple array configurations were used, providing a best spatial resolution of ∼0.15 arcse…