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14 Her: A Likely Case of Planet-Planet Scattering
Gelino, Christopher R.; Faherty, Jacqueline K.; Bardalez Gagliuffi, Daniella C. +4 more
In this Letter, we measure the full orbital architecture of the two-planet system around the nearby K0 dwarf 14 Herculis. 14 Her (HD 145675, HIP 79248) is a middle-aged ( ${4.6}_{-1.3}^{+3.8}$ Gyr) K0 star with two eccentric giant planets identified in the literature from radial velocity (RV) variability and long-term trends. Using archival RV dat…
Sublimation of Laboratory Ices Millimeter/Submillimeter Experiment (SubLIME): Structure-specific Identifications of Products from UV-photolyzed Methanol Ice
Gerakines, P. A.; Milam, S. N.; Widicus Weaver, S. L. +1 more
Submillimeter/far-IR spectroscopy was used to detect and quantify organic molecules sublimated after the ultraviolet photolysis (at 12 K) and warm-up (up to 300 K) of a methanol (CH3OH) ice sample. Eleven sublimated photoproducts were uniquely identified: carbon monoxide (CO), formaldehyde (H2CO), ketene (C2H2…
Detection of H2O and OH+ in z > 3 hot dust-obscured galaxies
Knudsen, K. K.; Aalto, S.; Falstad, N. +3 more
Aims: In this paper we present the detection of H2O and OH+ emission in z > 3 hot dust-obscured galaxies (Hot DOGs).
Methods: Using ALMA Band-6 observations of two Hot DOGs, we detected H2O(202 - 111) in W0149+2350, and H2O(312 - 303) and the multi…
HO Puppis: Not a Be Star, but a Newly Confirmed IW And-type Star
Duev, Dmitry A.; Riddle, Reed; Mróz, Przemek +19 more
HO Puppis (HO Pup) was considered as a Be-star candidate based on its γ Cassiopeiae-type light curve, but lacked spectroscopic confirmation. Using distance measured from Gaia Data Release 2 and the spectral-energy-distribution fit on broadband photometry, the Be-star nature of HO Pup is ruled out. Furthermore, based on the 28,700 photometric data …
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}\…