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Open AccessJournal ArticleDOI

Spectroscopy Made Easy: Evolution

TLDR
The Spectroscopy Made Easy (SME) package has become a popular tool for analyzing stellar spectra, often in connection with large surveys or exoplanet research as discussed by the authors.
Abstract
Context. The Spectroscopy Made Easy (SME) package has become a popular tool for analyzing stellar spectra, often in connection with large surveys or exoplanet research. SME has evolved significantl ...

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Journal ArticleDOI

The GALAH Survey: Second Data Release

TL;DR: In this paper, the authors present the GALAH second public data release (GALAH DR2) containing 342 682 stars and use the physics-driven spectrum synthesis of Spectroscopy Made Easy (SME) to derive stellar labels.
Journal ArticleDOI

The GALAH+ survey: Third data release

TL;DR: In this paper, the accepted manuscript version of an article which has been published in final form at https://doi.org/10.1093/mnras/stab1242
Journal ArticleDOI

An extended hydrogen envelope of the extremely hot giant exoplanet KELT-9b

TL;DR: In this paper, the authors detect an extended hot hydrogen atmosphere around KELT-9b by measuring the atomic hydrogen absorption during transit by observing the Balmer Hα line, which is unusually strong, mainly owing to the high level of extreme-ultraviolet radiation from the star.
References
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Journal ArticleDOI

A grid of MARCS model atmospheres for late-type stars. I. Methods and general properties

TL;DR: In this article, an extensive grid of spherically-symmetric models (supplemented with plane-parallel ones for the highest surface gravities), built on up-to-date atomic and molecular data, is presented.
Book

The observation and analysis of stellar photospheres

TL;DR: In this paper, the authors present a model of the photosphere of the black body and its radiation, and the measurement of stellar continua, spectral lines, and photospheric pressure.
Journal ArticleDOI

VALD{2: Progress of the Vienna Atomic Line Data Base ?

TL;DR: The updated version of the “Vienna Atomic Line Data Base” (VALD) is described which represents a considerable improvement over the first installation from 1994 and the future roadmap of VALD developments is discussed, including the incorporation of molecular transitions and integration with external data bases.
Journal ArticleDOI

Spectroscopic properties of cool stars (spocs). i. 1040 f, g, and k dwarfs from keck, lick, and aat planet search programs

TL;DR: In this article, the authors presented a catalog of stellar properties for 1040 nearby F, G, and K stars that have been observed by the Keck, Lick, and AAT planet search programs.
Journal ArticleDOI

Spectroscopy Made Easy: A New Tool for Fitting Observations with Synthetic Spectra

TL;DR: In this article, a nonlinear least squares algorithm is used to solve for any subset of allowed parameters, which include atomic data (loggf and van der Waals damping constants), model atmosphere specications (Te,l og g), elemental abundances, and radial, turbulent, and rotational velocities.
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Trending Questions (1)
How has spectroscopy evolved over time?

The paper discusses the evolution of the Spectroscopy Made Easy (SME) package, a tool for analyzing stellar spectra, but does not provide a comprehensive overview of how spectroscopy as a field has evolved over time.