Results 141 to 150 of about 173,010 (211)

Further observations of the lambda 10830 He line in stars and their significance as a measure of stellar activity [PDF]

open access: yes
Measurements of the lambda 1030 He line in 198 stars are given along with data on other features in that spectral range. Nearly 80% of all G and K stars show some lambda 10830; of these, half are variable and 1/4 show emission.
Zirin, H.
core   +1 more source

Argon in β Pictoris–Entrapment and Release of Volatile in Disks

open access: yesThe Astrophysical Journal
Chemical compositions of planets reveal much about their formation environments. Such information is well sought-after in studies of solar system bodies and extrasolar ones.
Yanqin Wu   +3 more
doaj   +1 more source

Hα Emission among Evolved FGKM Stars: A Compendium from the Literature

open access: yesThe Astronomical Journal
Emission in the wings of the H α line among late-type giant stars occurs as a consequence of conditions in their chromospheres. Data from the literature have been used to document the incidence of H α emission among Population I giant stars as a function
Graeme H. Smith
doaj   +1 more source

Stellar activity and coronal heating: an overview of recent results. [PDF]

open access: yesPhilos Trans A Math Phys Eng Sci, 2015
Testa P, Saar SH, Drake JJ.
europepmc   +1 more source

Potential biosignatures in super-Earth atmospheres II. Photochemical responses. [PDF]

open access: yesAstrobiology, 2013
Grenfell JL   +8 more
europepmc   +1 more source

Beam electrons as a source of Hα flare ribbons. [PDF]

open access: yesNat Commun, 2017
Druett M   +5 more
europepmc   +1 more source

On Methods and Applications in Spectrophotometry. [PDF]

open access: yesProc Natl Acad Sci U S A, 1928
Payne CH, Hogg FS.
europepmc   +1 more source

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