Results 81 to 90 of about 765,419 (288)

Chemical abundances of planet-host stars [PDF]

Astronomy & Astrophysics, 2003
In this paper, we present a study of the abundances of Si, Ca, Sc, Ti, V, Cr, Mn, Co, and Ni in a large set of stars known to harbor giant planets, as well as in a comparison sample of stars not known to have any planet ary-mass companions. We have checked for possible chemical differences between planet hosts and field stars without known planets. Our
Bodaghee, A., Santos, N. C., Israelian, G., Mayor, M.   +3 more
openaire   +2 more sources

Magnetic Water Cleaning of Estrogens via Tight yet Dynamic Binding to Nanoparticles

Advanced Science, EarlyView.
Micropollution is one of the big challenges humanity faces with estrogen hormones being emerging pollutants of concern. Here, a supramolecular design strategy is presented that generates a simple nano‐adsorbent material to magnetically remove low‐concentrated estrogens from water.
Lukas Müller, Philip Maier, Dustin Vivod, Wenke Müller, Nikolaj Lopatik, Theresa Maria Schichtl, Julia Fröhlich, Irene Kraus, Marten Huck, Wieland Corts, Clodomiro Cafolla, Lukas Ruhm, Henrik Gaß, Johannes Voß, Jiwon Byun, Linda Rockmann, Guido Grundmeier, Kislon Voïtchovsky, Hans‐Georg Steinrück, Erdmann Spiecker, Sevim Dalabasmaz, Monika Pischetsrieder, Eike Brunner, Ralf Schweins, Dirk Zahn, Marcus Halik   +25 more
wiley   +1 more source

Metallicities and Refined Stellar Parameters for 52 Cool Dwarfs with Transiting Planets and Planet Candidates

The Astrophysical Journal Supplement Series
We collected near-infrared spectra of 65 cool stars with the NASA Infrared Telescope Facility and analyzed them to calculate accurate metallicities and stellar parameters.
Rebecca Gore, Steven Giacalone, Courtney D. Dressing, Emma V. Turtelboom, Ashley Schroeder, Charles D. Fortenbach, Kevin K. Hardegree-Ullman, Jon K. Zink, Andrew W. Mayo, Joshua E. Schlieder, Jessie L. Christiansen   +10 more
doaj   +1 more source

Tidal star-planet interaction and its observed impact on stellar activity in planet-hosting wide binary systems

, 2022
Tidal interaction between an exoplanet and its host star is a possible pathway to transfer angular momentum between the planetary orbit and the stellar spin.
Poppenhäger, Katja (Prof. Dr.), Ilić Petković, Nikoleta (Dr.), Hosseini, Seyede Marzieh, N Ilic, S Marzieh Hosseini, K Poppenhaeger   +5 more
core   +1 more source

Spatiotemporal Multi‐Omic Mapping Reveals Liver‐Muscle Metabolic Crosstalk in Cancer Cachexia

Advanced Science, EarlyView.
The interactive CCAtlas platform delineates cross‐species, spatiotemporal, and sex‐specific molecular dynamics and metabolic rewiring across organs during cancer cachexia. Hepatic Gamt downregulation curtails hepatic creatine synthesis to trigger systemic creatine insufficiency and consequent skeletal muscle atrophy in LLC tumour‐bearing mice ...
Zihan Tian, Qianyu Wang, Wenyan Gao, Xianfeng Li, Jiawen Fan, Xiaoliang Wu, Siqi Liu, Xiangdong Ming, Danna Yeerken, Mutian Shen, Qingjie Min, Qimin Zhan, Yan Wang   +12 more
wiley   +1 more source

Utilizing Machine Learning to Predict Host Stars and the Key Elemental Abundances of Small Planets

The Astronomical Journal
Stars and their associated planets originate from the same cloud of gas and dust, making a star’s elemental composition a valuable indicator for indirectly studying planetary compositions. While the connection between a star’s iron (Fe) abundance and the
Amílcar R. Torres-Quijano, Natalie R. Hinkel, Caleb H. Wheeler III, Patrick A. Young, Luan Ghezzi, Augusto P. Baldo   +5 more
doaj   +1 more source

THE ROTATION PERIOD OF THE PLANET-HOSTING STAR HD 189733

The Astronomical Journal, 2007
We present synoptic optical photometry of HD 189733, the chromospherically active parent star of one of the most intensively studied exoplanets. We have significantly extended the timespan of our previously reported observations and refined the estimate of the stellar rotation period by more than an order of magnitude: $P = 11.953\pm 0.009$ days.
Henry, Gregory W., Winn, Joshua N.
openaire   +2 more sources

Expanding Genetic Code to Generate Human Brain Organoids with Both Vasculature and Microglia‐Like Cells

Advanced Science, EarlyView.
Using genetic code expansion, we engineered vascularized human cerebral organoids (vhCOs) with microglia‐like cells and blood‐brain barrier features. vhCOs recapitulate neurovascular interactions, regional identities, and neuronal subtypes resembling the fetal brain.
Haishuang Lin, Yaqing Wang, Hu Du, Yuxin Qin, Haoyu Zhang, Peng Wang, Lin Wei, Jianhua Qin   +7 more
wiley   +1 more source

Host–Non-host Differences in Stellar Chemistry, Activity, and Birth Radius: Hints of Distinct Formation Environments for Earth-like Planets and Sub-Neptunes

The Astrophysical Journal
Host-star properties provide important clues to planet formation and evolution, yet it remains unclear whether the observed differences between planet-hosting stars and stars without detected planets reflect genuine signatures of planet formation or ...
Xunzhou Chen, Tiancheng Sun, Yuxi (Lucy) Lu, Liu Long, Zixuan Lu   +4 more
doaj   +1 more source

The Densities of Planets and the Masses of Host Stars

, 2013
Studies of transiting extra-solar planets are of key importance for understanding the nature of planets outside our Solar System, because their densities can be determined, constraining of what the planets are made of. Using the data obtained by the CoRoT space telescope we study the relation between the density of planets, their mass, and the mass of ...
Guenther, Eike W., CoRoT-Team
openaire   +2 more sources