Search Publications
How Complete Are Surveys for Nearby Transiting Hot Jupiters?
Winn, Joshua N.; Hartman, Joel D.; Yee, Samuel W.
Hot Jupiters are a rare and interesting outcome of planet formation. Although more than 500 hot Jupiters (HJs) are known, most of them were discovered by a heterogeneous collection of surveys with selection biases that are difficult to quantify. Currently, our best knowledge of HJ demographics around FGK stars comes from the sample of ≈40 objects …
The Nature of HI-absorption-selected Galaxies at z ≈ 4
Prochaska, J. X.; Revalski, M.; Rafelski, M. +3 more
We report a Karl G. Jansky Very Large Array (JVLA) search for redshifted CO(1-0) or CO(2-1) emission, and a Hubble Space Telescope Wide Field Camera 3 (HST-WFC3) search for rest-frame near-ultraviolet (NUV) stellar emission, from seven HI-selected galaxies associated with high-metallicity ([M/H] ≥ -1.3) damped Lyα absorbers (DLAs) at z ≈ 4. The ga…
Deep extragalactic visible legacy survey (DEVILS): stellar mass growth by morphological type since z = 1
Holwerda, Benne W.; Driver, Simon P.; Robotham, Aaron S. G. +13 more
Using high-resolution Hubble Space Telescope imaging data, we perform a visual morphological classification of ~36 000 galaxies at z < 1 in the deep extragalactic visible legacy survey/cosmological evolution survey region. As the main goal of this study, we derive the stellar mass function (SMF) and stellar mass density (SMD) sub-divided by mor…
Search for (sub)stellar companions of exoplanet hosts by exploring the second ESA-Gaia data release
Mugrauer, M.; Michel, K. -U.
We present the latest results of an ongoing multiplicity survey of exoplanet hosts, which was initiated at the Astrophysical Institute and University Observatory Jena, using data from the second data release of the ESA-Gaia mission. In this study the multiplicity of 289 targets was investigated, all located within a distance of about 500\,pc from …
High-redshift Narrow-line Seyfert 1 Galaxies: A Candidate Sample
Stalin, C. S.; Rakshit, Suvendu; Shin, Jaejin +1 more
The study of narrow-line Seyfert 1 galaxies (NLS1s) is now mostly limited to low redshift (z < 0.8) because their definition requires the presence of the Hβ emission line, which is redshifted out of the spectral coverage of major ground-based spectroscopic surveys at z > 0.8. We studied the correlation between the properties of Hβ and Mg II …
The First Extensive Exploration of UV-bright Stars in the Globular Cluster NGC 2808
Sahu, Snehalata; Subramaniam, Annapurni; Prabhu, Deepthi S.
In this study, we identified and characterized the hot and luminous UV-bright stars in the globular cluster NGC 2808. We combined data from the Ultra Violet Imaging Telescope (UVIT) on board the Indian space satellite AstroSat with the Hubble Space Telescope UV Globular Cluster Survey data for the central region (within $\sim 2\buildrel{\,\prime}\…
The evolution of lithium in FGK dwarf stars. The lithium-rotation connection and the Li desert
Cifuentes, C.; Roca-Fàbrega, S.; Llorente de Andrés, F. +2 more
We investigate two topics regarding solar mass FGK-type stars, the lithium-rotation connection (LRC), and the existence of the `lithium desert'. We determine the minimum critical rotation velocity (v sin i), related with the LRC separating slow from rapid stellar rotators, to be 5 km s−1. This value also splits different stellar propert…
MOBSTER - IV. Detection of a new magnetic B-type star from follow-up spectropolarimetric observations of photometrically selected candidates★
Wade, G. A.; Neiner, C.; Bowman, D. M. +8 more
In this paper, we present results from the spectropolarimetric follow-up of photometrically selected candidate magnetic B stars from the MOBSTER (Magnetic OB[A] Stars with TESS: probing their Evolutionary and Rotational properties) project. Out of four observed targets, one (HD 38170) is found to host a detectable surface magnetic field, with a ma…
Mid-infrared spectroscopy of crystalline plagioclase feldspar samples with various Al,Si order and implications for remote sensing of Mercury and other terrestrial Solar System objects
Hiesinger, Harald; Helbert, Jörn; Weber, Iris +4 more
We analyzed plagioclase feldspar samples that were well-characterized in terms of chemical composition as well as degree of Al,Si order in mid-infrared reflection spectra between 7 µm and 14 µm (1429 cm-1 and 714 cm-1). The chemical compositions were derived with an electron microprobe analyzer. To determine the d…
Solar Orbiter observations of an ion-scale flux rope confined to a bifurcated solar wind current sheet
Eastwood, J. P.; Lavraud, B.; Horbury, T. S. +10 more
Context. Flux ropes in the solar wind are a key element of heliospheric dynamics and particle acceleration. When associated with current sheets, the primary formation mechanism is magnetic reconnection and flux ropes in current sheets are commonly used as tracers of the reconnection process.
Aims: Whilst flux ropes associated with reconnectin…