Search Publications
Testing the accuracy of 3D-HST photometric redshift estimates as reference samples for deep weak lensing studies
Schrabback, T.; Mahler, G.; Hildebrandt, H. +2 more
Accurate weak lensing mass estimates of clusters are needed to calibrate mass proxies for the cosmological exploitation of galaxy cluster surveys. Such measurements require accurate knowledge of the redshift distribution of the weak lensing source galaxies. In this context, we investigate the accuracy of photometric redshifts (photo-zs) computed b…
A holistic and probabilistic approach to the ground-based and spaceborne data of HAT-P-19 system
Southworth, J.; Mancini, L.; Daylan, T. +5 more
We update the main physical and orbital properties of the transiting hot Saturn planet HAT-P-19 b, based on a global modelling of high-precision transit and occultation light curves, taken with ground-based and space telescopes, archive spectra and radial velocity measurements, brightness values from broad-band photometry, and Gaia parallax. We co…
Effects of metallicity on high-mass X-ray binary formation
Kaaret, P.; Brorby, M.; Ponnada, S.
The heating of the intergalactic medium in the early, metal-poor Universe may have been partly due to radiation from high-mass X-ray binaries (HMXBs). Previous investigations on the effect of metallicity have used galaxies of different types. To isolate the effects of metallicity on the production of HMXBs, we study a sample consisting only of 46 …
Variability of spider spatial configuration at the Martian south pole
Jaumann, R.; Hauber, E.; Portyankina, G. +5 more
Araneiform terrain, or "spider" (spider-like surface modifications) is suggested to form through basal sublimation of seasonal translucent CO2 slab ice and subsequent gas jetting, and so far only known to occur at the Martian south pole. Their spatial configuration characteristics remain incompletely understood. We observed non-random s…
Spectroscopic Detection of the Pre-White Dwarf Companion of Regulus
Gies, Douglas R.; Lester, Kathryn V.; Wang, Luqian +6 more
Mass transfer in an interacting binary will often strip the mass donor of its entire envelope and spin up the mass gainer to near critical rotation. The nearby B-type star Regulus represents a binary in the post-mass transfer stage: it is a rapid rotator with a very faint companion in a 40 days orbit. Here we present the results of a search for th…
Physical properties of the CDFS X-ray sources through fitting spectral energy distributions
Gu, Qiusheng; Guo, Xiaotong; Ding, Nan +2 more
The physical parameters of galaxies and/or active galactic nucleus (AGNs) can be derived by fitting their multiband spectral energy distributions (SEDs). By using CIGALE code, we perform multiband SED fitting (from ultraviolet to infrared) for 791 X-ray sources (518 AGNs and 273 normal galaxies) in the 7 Ms Chandra Deep Field-south survey (CDFS). …
Hydroxylated Mg-rich Amorphous Silicates: A New Component of the 3.2 µm Absorption Band of Comet 67P/Churyumov-Gerasimenko
Carlson, R. W.; Kappel, D.; Pommerol, A. +13 more
The VIRTIS imaging spectrometer on board Rosetta has shown that the nucleus surface of comet 67P/Churyumov-Gerasimenko (67P/CG) is characterized by a broad absorption band at around 3.2 µm. The feature is ubiquitous across the surface and its attribution to (a) specific material(s) has been challenging. In the present Letter, we report an ex…
Propagation properties of foreshock cavitons: Cluster observations
Zhang, Hui; Fu, SuiYan; Sun, WeiJie +12 more
ALMA observations of CS in NGC 1068: chemistry and excitation
Saintonge, A.; Krips, M.; Kohno, K. +14 more
We present results from Atacama Large Millimeter/submillimeter Array (ALMA) observations of CS from the nearby galaxy NGC 1068 (~14 Mpc). This Seyfert 2 barred galaxy possesses a circumnuclear disc (CND, r ~ 200 pc) and a starburst ring (SB ring, r ~ 1.3 kpc). These high-resolution maps (~0.5 arcsec, ~35 pc) allow us to analyse specific sub-region…
High-resolution Spectral Discriminants of Ocean Loss for M-dwarf Terrestrial Exoplanets
Lustig-Yaeger, Jacob; Meadows, Victoria S.; Leung, Michaela
In the near future, extremely large ground-based telescopes may conduct some of the first searches for life beyond the solar system. High spectral resolution observations of reflected light from nearby exoplanetary atmospheres could be used to search for the biosignature oxygen. However, while Earth's abundant O2 is photosynthetic, earl…