Zobrazeno 1 - 10
of 162
pro vyhledávání: '"Adam A. Kowalski"'
Autor:
Adam F. Kowalski
Publikováno v:
Living Reviews in Solar Physics, Vol 21, Iss 1, Pp 1-157 (2024)
Abstract Magnetic storms on stars manifest as remarkable, randomly occurring changes of the luminosity over durations that are tiny in comparison to the normal evolution of stars. These stellar flares are bursts of electromagnetic radiation from X-ra
Externí odkaz:
https://doaj.org/article/4190e87e64634ddeb55b801e0fb4ad0e
Autor:
Adam A. Kowalski, Lekelia D. Jenkins
Publikováno v:
Ecology and Society, Vol 20, Iss 2, p 16 (2015)
The linkage of diverse sets of actors and knowledge systems across management levels and institutional boundaries often poses one of the greatest challenges in adaptive management of natural resources. Bridging organizations can facilitate interactio
Externí odkaz:
https://doaj.org/article/3fde279bbf7645809a279cff9732a713
Autor:
Rishi R. Paudel, Thomas Barclay, Allison Youngblood, Elisa V. Quintana, Joshua E. Schlieder, Laura D. Vega, Emily A. Gilbert, Rachel A. Osten, Sarah Peacock, Isaiah I. Tristan, Dax L. Feliz, Patricia T. Boyd, James R. A. Davenport, Daniel Huber, Adam F. Kowalski, Teresa Monsue, Michele L. Silverstein
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 24 (2024)
We present a comprehensive multiwavelength investigation into flares and activity in nearby M dwarf stars. We leverage the most extensive contemporaneous data set obtained through the Transiting Exoplanet Sky Survey, Kepler/K2, the Neil Gehrels Swift
Externí odkaz:
https://doaj.org/article/a238f988b84946c6964269c39df9e073
Autor:
Elizabeth C. Butler, Adam F. Kowalski
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 1, p 33 (2024)
Chromospheric condensations (CCs) are a prominent feature of flare footpoint heating in the solar flare standard model, yet their timescales and velocities are not well understood. Fisher derived several important analytical relationships, which have
Externí odkaz:
https://doaj.org/article/0b481ab1c1d34d0a996857bc5b95d834
Publikováno v:
The Astrophysical Journal, Vol 969, Iss 2, p 121 (2024)
Optical flares have been observed from magnetically active stars for many decades; unsurprisingly, the spectra and temporal evolution are complicated. For example, the shortcomings of optically thin, static slab models have long been recognized when
Externí odkaz:
https://doaj.org/article/15378d2e16d14774ba205031525a736a
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 1, p 94 (2024)
We develop the impulsiveness index, a new classification system for solar flares using the Solar Dynamics Observatory/Extreme Ultraviolet Experiment 304 Å Sun-as-a-star light curves. Impulsiveness classifies events based on the duration and intensit
Externí odkaz:
https://doaj.org/article/fcba6adbaa134c15ba23a5262d8e7528
Publikováno v:
The Astrophysical Journal, Vol 963, Iss 1, p 40 (2024)
During solar flares, spectral lines formed in the photosphere have been shown to exhibit changes to their profiles despite the challenges of energy transfer to these depths. Recent work has shown that deep-forming spectral lines are subject to signif
Externí odkaz:
https://doaj.org/article/97375ed9cac440bfa709193dc77bc18c
Autor:
Yuta Notsu, Adam F. Kowalski, Hiroyuki Maehara, Kosuke Namekata, Kenji Hamaguchi, Teruaki Enoto, Isaiah I. Tristan, Suzanne L. Hawley, James R. A. Davenport, Satoshi Honda, Kai Ikuta, Shun Inoue, Keiichi Namizaki, Daisaku Nogami, Kazunari Shibata
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 2, p 189 (2024)
We conducted the time-resolved simultaneous optical spectroscopic and photometric observations of mid-M-dwarf flare stars YZ CMi, EV Lac, and AD Leo. Spectroscopic observations were obtained using Apache Point Observatory 3.5 m and Small and Moderate
Externí odkaz:
https://doaj.org/article/f5c6d27694c84a49bf8bb9ee21fe127c
Autor:
Adam F. Kowalski
Publikováno v:
The Astrophysical Journal Letters, Vol 943, Iss 2, p L23 (2023)
The optical and near-ultraviolet (NUV) continuum radiation in M-dwarf flares is thought to be the impulsive response of the lower stellar atmosphere to magnetic energy release and electron acceleration at coronal altitudes. This radiation is sometime
Externí odkaz:
https://doaj.org/article/31d0f3d09d3d43ff94338965cf00e712
Autor:
Adam F. Kowalski
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 9 (2022)
White-light stellar flares are now reported by the thousands in long-baseline, high-precision, broad-band photometry from missions like Kepler, K2, and TESS. These observations are crucial inputs for assessments of biosignatures in exoplanetary atmos
Externí odkaz:
https://doaj.org/article/fbd48a5058f649b48ff812bee588594e