17 research outputs found

    TOI-431/HIP 26013: a super-Earth and a sub-Neptune transiting a bright, early K dwarf, with a third RV planet

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    We present the bright (Vmag = 9.12), multiplanet system TOI-431, characterized with photometry and radial velocities (RVs). We estimate the stellar rotation period to be 30.5 ± 0.7 d using archival photometry and RVs. Transiting Exoplanet Survey Satellite (TESS) objects of Interest (TOI)-431 b is a super-Earth with a period of 0.49 d, a radius of 1.28 ± 0.04 R⊕, a mass of 3.07 ± 0.35 M⊕, and a density of 8.0 ± 1.0 g cm−3; TOI-431 d is a sub-Neptune with a period of 12.46 d, a radius of 3.29 ± 0.09 R⊕, a mass of 9.90+1.53−1.49 M⊕, and a density of 1.36 ± 0.25 g cm−3. We find a third planet, TOI-431 c, in the High Accuracy Radial velocity Planet Searcher RV data, but it is not seen to transit in the TESS light curves. It has an Msin i of 2.83+0.41−0.34 M⊕, and a period of 4.85 d. TOI-431 d likely has an extended atmosphere and is one of the most well-suited TESS discoveries for atmospheric characterization, while the super-Earth TOI-431 b may be a stripped core. These planets straddle the radius gap, presenting an interesting case-study for atmospheric evolution, and TOI-431 b is a prime TESS discovery for the study of rocky planet phase curves

    TOI-431/HIP 26013: a super-Earth and a sub-Neptune transiting a bright, early K dwarf, with a third RV planet

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    Stars and planetary system

    TOI-431/HIP 26013: A super-Earth and a sub-Neptune transiting a bright, early K dwarf, with a third RV planet

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    We present the bright (Vmag = 9.12), multiplanet system TOI-431, characterized with photometry and radial velocities (RVs). We estimate the stellar rotation period to be 30.5 ± 0.7 d using archival photometry and RVs. Transiting Exoplanet Survey Satellite (TESS) objects of Interest (TOI)-431 b is a super-Earth with a period of 0.49 d, a radius of 1.28 ± 0.04 R, a mass of 3.07 ± 0.35 M, and a density of 8.0 ± 1.0 g cm-3; TOI-431 d is a sub-Neptune with a period of 12.46 d, a radius of 3.29 ± 0.09 R, a mass of 9.90+1.53-1.49 M, and a density of 1.36 ± 0.25 g cm-3. We find a third planet, TOI-431 c, in the High Accuracy Radial velocity Planet Searcher RV data, but it is not seen to transit in the TESS light curves. It has an Msin i of 2.83+0.41-0.34 M, and a period of 4.85 d. TOI-431 d likely has an extended atmosphere and is one of the most well-suited TESS discoveries for atmospheric characterization, while the super-Earth TOI-431 b may be a stripped core. These planets straddle the radius gap, presenting an interesting case-study for atmospheric evolution, and TOI-431 b is a prime TESS discovery for the study of rocky planet phase curves

    In Memoriam: Frank W. Marlowe (April 17, 1954 – September 25, 2019)

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    VÀlttelevÀn kiintymyssuhteen merkitys lapsen hyvinvoinnille

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    Tarkoituksena tĂ€ssĂ€ opinnĂ€ytetyössĂ€ on koota tutkimustietoa vĂ€lttelevĂ€stĂ€ kiintymyssuhteesta ja sen merkityksestĂ€ lapsen hyvinvoinnille. Tavoitteena oli kehittÀÀ ammatillista osaamista teoriapohjan osalta ja kĂ€sitellĂ€ tutkittavaa aihetta psykiatrisen hoitotyön nĂ€kökulmasta, mikĂ€ on suuntautumiseni. Tutkimuskysymys on jaettu kahteen osaan: vanhempien ja lapsen vĂ€linen kiintymyssuhde ja lapsen kehitys ja hyvinvointi. NĂ€iden osien ulottuvilta on haettu tutkimusartikkeleita, tutkimusraportteja ja asiantuntijakirjoituksia, joista on koottu tiivistelmiĂ€ kirjallisuuskatsauksen tapaan. Pohdinnassa on eritelty aineistoa tarkemmin tutkimuskysymyksen osalta. Kiintymyssuhde kehittyy lapsella varhaisen vuorovaikutuksen kautta 0–2-vuotiaana. Jos vanhemmat laiminlyövĂ€t kommunikoinnin lapsen kanssa, emotionaalinen kehitys jÀÀ vajaaksi eikĂ€ lapsi opi ilmaisemaan omia tarpeitaan ja tunteitaan. VĂ€lttelevĂ€n kiintymyssuhteen seuraukset voivat olla laajat epĂ€sosiaalisuudesta kognitiivisiin hĂ€iriöihin. EpĂ€sosiaalisuuteen kytkeytyviin hĂ€iriöihin kuuluu puhumattomuus, eristĂ€ytyminen ja laajemmin kroonistunut masennus, mihin taas liittyy vahva itsetuhoisuuden riski

    Untersuchungen zum Plasma-Heissdraht-Auftragschweissen mit den Duplex-Werkstoffen X2 CrNiMoN 22 5 3 und X2 CrNiMoN 25 7 4 Abschlussbericht

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    The research project aimed at obtaining verifiable knowledge of structural development during welding, precipitation and embrittlement tendencies, changes of the austenite-ferrite ratio, and corrosion behaviour, for the application of such coatings to chemical apparatus and plant construction as well as to flue gas desulphurization systems and off- and onshore technologies. (EG9504) (orig./MM)Das Ziel des Forschungsvorhabens war es, gesicherte Erkenntnisse ueber Gefuegeausbildung beim Schweissen, Ausscheidungs- und Versproedungsneigung, Aenderungen im Austenit-Ferrit-Verhaeltnis und Korrosionsverhalten fuer den Einsatz derartiger Beschichtungen im chemischen Apparate- und Anlagenbau sowie fuer Systeme der Rauchgasentschwefelung und der Off- und Onshoretechnik zu erarbeiten. (orig./MM)Available from TIB Hannover: F95B1599 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEArbeitsgemeinschaft Industrieller Forschungsvereinigungen e.V., Koeln (Germany)DEGerman
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