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Related papers: MOSiC: an analysis tool for IRIS spectral data

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NASA's Interface Region Imaging Spectrograph (IRIS) small explorer mission will study how the solar atmosphere is energized. IRIS contains an imaging spectrograph that covers the Mg II h&k lines as well as a slit-jaw imager centered at Mg…

Solar and Stellar Astrophysics · Physics 2015-06-16 J. Leenaarts , T. M. D. Pereira , M. Carlsson , H. Uitenbroek , B. de Pontieu

The Mg II h&k doublet are two of the primary spectral lines observed by the Sun-pointing Interface Region Imaging Spectrograph (IRIS). These lines are tracers of the magnetic and thermal environment that spans from the photosphere to the…

Solar and Stellar Astrophysics · Physics 2015-10-07 Donald Schmit , Paul Bryans , Bart De Pontieu , Scott McIntosh , Jorrit Leenaarts , Mats Carlsson

The C II 133.5 nm multiplet has been observed by NASA's Interface Region Imaging Spectrograph (IRIS) in unprecedented spatial resolution. The aims of this work are to characterize these new observations of the C II lines, place them in…

Solar and Stellar Astrophysics · Physics 2015-10-30 Bhavna Rathore , Tiago M. D. Pereira , Mats Carlsson , Bart De Pontieu

The Mg II h&k lines are the prime chromospheric diagnostics of NASA's Interface Region Imaging Spectrograph (IRIS). In the previous papers of this series we used a realistic three-dimensional radiative magnetohydrodynamics model to…

Solar and Stellar Astrophysics · Physics 2013-11-21 Tiago M. D. Pereira , Jorrit Leenaarts , Bart De Pontieu , Mats Carlsson , Han Uitenbroek

We use 3D radiation magnetohydrodynamic models to investigate how the thermodynamic quantities in the simulation are encoded in observable quantities, thus exploring the diagnostic potential of the 133.5 nm lines. We find that the line core…

Solar and Stellar Astrophysics · Physics 2015-09-30 Bhavna Rathore , Mats Carlsson , Jorrit Leenaarts , Bart De Pontieu

Observations by the Interface Region Imaging Spectrograph (IRIS) in the Mg II h & k spectral lines have provided a new diagnostic window towards the knowledge of the complex physical conditions in the solar chromosphere. Theoretical efforts…

Solar and Stellar Astrophysics · Physics 2023-03-15 Alberto Sainz Dalda , Bart De Pontieu

In this study we extract the deep features and investigate the compression of the Mg II k spectral line profiles observed in quiet Sun regions by NASA's IRIS satellite. The data set of line profiles used for the analysis was obtained on…

IRIS performs solar observations over a large range of atmospheric heights, including the chromosphere where the majority of flare energy is dissipated. The strong Mg II h&k spectral lines are capable of providing excellent atmospheric…

Solar and Stellar Astrophysics · Physics 2018-07-18 B. Panos , L. Kleint , C. Huwyler , S. Krucker , M. Melchior , D. Ullmann , S. Voloshynovskiy

Line intensity mapping (LIM) is a promising approach to study star formation and the interstellar medium (ISM) in galaxies by measuring the aggregate line emission from the entire galaxy population. In this work, we develop a simple yet…

Astrophysics of Galaxies · Physics 2020-01-08 Guochao Sun , Brandon S. Hensley , Tzu-Ching Chang , Olivier Doré , Paolo Serra

The flare activity of the Sun has been studied for decades, using both space- and ground-based telescopes. In particular, the Interface Region Imaging Spectrograph (IRIS) provides unique diagnostics to investigate the thermodynamics of…

Solar and Stellar Astrophysics · Physics 2022-11-11 Alberto Sainz Dalda , Bart De Pontieu

In this work, we present the program MOLLId (MOLecular Line Identification) for automated molecular lines approximation with gaussian profile. Molecular identification was performed using multi-level comparison of the lines' center…

Astrophysics of Galaxies · Physics 2026-03-05 A. A. Farafontova , M. S. Kirsanova , S. V. Salii

MOMOS, the Multi-Object MKID Optical Spectrometer, is a proposed visible wavelength spectrometer that uses MKIDs (Microwave Kinetic Inductance Detectors) targeting an initial resolving power of 3500. With their modest wavelength-resolving…

Instrumentation and Methods for Astrophysics · Physics 2025-03-04 Crystal S. Kim , John I. Bailey , Ronald A. López , W. Hawkins Clay , Benjamin A. Mazin

Inversion codes allow reconstructing a model atmosphere from observations. With the inclusion of optically thick lines that form in the solar chromosphere, such modelling is computationally very expensive because a non-LTE evaluation of the…

Solar and Stellar Astrophysics · Physics 2019-04-19 Alberto Sainz Dalda , Jaime de la Cruz Rodríguez , Bart De Pontieu , Milan Gošić

The paper analyzes the structure and dynamics of a quiescent prominence that occurred on October 22, 2013. We aim to determine the physical characteristics of the observed prominence using MgII k and h, CII (1334 and 1336 A), and SiIV (1394…

Solar and Stellar Astrophysics · Physics 2018-10-17 S. Jejčič , P. Schwartz , P. Heinzel , M. Zapiór , S. Gunár

We investigated the off-limb spicules observed in the Mg II h and k lines by IRIS in a solar polar coronal hole. We analyzed the large dataset of obtained spectra to extract quantitative information about the line intensities, shifts, and…

Solar and Stellar Astrophysics · Physics 2020-01-15 Akiko Tei , Stanislav Gunar , Petr Heinzel , Takenori J. Okamoto , Jiri Stepan , Sonja Jejcic , Kazunari Shibata

Line intensity mapping (LIM) is a technique for producing 3D maps of the Universe by scanning the sky with a spectrometer sensitive to a range of wavelengths corresponding to the redshifted spectral lines of atoms or molecules, such as…

Cosmology and Nongalactic Astrophysics · Physics 2026-03-16 Samuel H. Kramer , Patrick C. Breysse , Anthony R. Pullen , Faizah K. Siddique , Eric R. Switzer , Peter T. Timbie , Dongwoo Chung

The detailed shapes of spectral line profiles provide valuable information about the emitting plasma, especially when the plasma contains an unresolved mixture of velocities, temperatures, and densities. As a result of finite spectral…

Solar and Stellar Astrophysics · Physics 2015-07-17 James A. Klimchuk , Spiros Patsourakos , Durgesh Tripathi

An efficient method to compute accurate polarized solar radiance spectra using the (three-dimensional) Monte Carlo model MYSTIC has been developed. Such high resolution spectra are measured by various satellite instruments for remote…

Earth and Planetary Astrophysics · Physics 2019-01-08 C. Emde , R. Buras , B. Mayer

Mapping of the large-scale structure through cosmic time has numerous applications in the studies of cosmology and galaxy evolution. At $z > 2$, the structure can be traced by the neutral intergalactic medium (IGM) by way of observing the…

Spectral lines allow us to probe the thermodynamics of the solar atmosphere, but the shape of a single spectral line may be similar for different thermodynamic solutions. Multiline analyses are therefore crucial, but computationally…

Solar and Stellar Astrophysics · Physics 2021-05-19 Brandon Panos , Lucia Kleint , Sviatoslav Voloshynovskiy
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