Results 91 to 100 of about 199,190 (345)

Lyα Emission from K and M Dwarfs: Intrinsic Profiles, Variability, and Flux in the Habitable Zone

The Astrophysical Journal
Lyman-alpha (Ly α ) is the most prominent ultraviolet (UV) emission line in low-mass stars, playing a crucial role in exoplanet atmospheric photochemistry, heating, and escape.
Sarah Peacock, Travis S. Barman, R. O. Parke Loyd, Adam C. Schneider, Allison Youngblood, Kenneth G. Carpenter, Evgenya L. Shkolnik   +6 more
doaj   +1 more source

Observations of southern emission-line stars

The Astrophysical Journal Supplement Series, 1976
A catalog of 1929 stars showing H-alpha emission on photographic plates is presented which covers the entire southern sky south of declination -25 deg to a red limiting magnitude of about 11.0. The catalog provides previous designations of known emission-line stars equatorial (1900) and galactic coordinates, visual and photographic magnitudes, H-alpha ...
openaire   +1 more source

Emission-Line Variability in Quiescent Flare Stars [PDF]

Monthly Notices of the Royal Astronomical Society, 1974
Spectroscopic monitoring of five flare stars (UV Ceti, YZ CMi, BY Dra, YY Gem, and BD + 48 deg 1958A) reveals that the stars exhibit marked decreases in the Balmer and Ca II emission line strengths over intervals of one day or less. The variations can be explained by a nonuniform, patchy distribution of emitting regions on a rotating star.
openaire   +1 more source

Dapagliflozin prevents methylglyoxal‐induced retinal cell death in ARPE‐19 cells

FEBS Open Bio, EarlyView.
Diabetic macular oedema is a diabetes complication of the eye, which may lead to permanent blindness. ARPE‐19 are human retinal cells used to study retinal diseases and potential therapeutics. Methylglyoxal is a compound increased in uncontrolled diabetes due to elevated blood glucose.
Naina Trivedi, Zainab Quraishi, Shima Khezri Azizi Far, Madaleine Ward, Aidan Conway, Reem Abdulredha, Eman Mshari, Yousif A. Shamsaldeen   +7 more
wiley   +1 more source

Multiple populations of Hβ emission line stars in the Large Magellanic Cloud cluster NGC 1971 [PDF]

, 2020
Andrés E. Piatti
openalex   +1 more source

Promiscuous stimulation of HSP70 ATPase activity by parasite‐derived J‐domains

FEBS Open Bio, EarlyView.
The malaria parasite Plasmodium falciparum exports three highly homologous yet functionally divergent J‐domain proteins into human erythrocytes. Here, we show that J‐domains isolated from all three proteins effectively stimulate the ATPase activity of both endogenous host and exported parasite HSP70 chaperones.
Julian Barth, Moritz Koch, Le‐Han Rössner, Johanna Eichhorn, Denys Pogoryelov, Matthias P. Mayer, Jude M. Przyborski   +6 more
wiley   +1 more source

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

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

Spatially resolved study of the physical properties of the ionized gas in NGC 595

, 2010
We present Integral Field Spectroscopy (IFS) of NGC 595, one of the most luminous HII regions in M33. This type of observations allows studying the variation of the principal emission-line ratios across the surface of the nebula.
A. Monreal-Ibero, Allen, Alonso-Herrero, Armandroff, Asplund, Baldwin, Baldwin, Bosch, Castañeda, Conti, Denicoló, Dopita, Dray, Drissen, Drissen, Ercolano, Esteban, Filippenko, Freedman, González-Delgado, González-Delgado, Hoogerwerf, J. M. Vílchez, Jamet, Kauffmann, Kelz, Kennicutt, Kewley, Kewley, Kobulnicky, Kobulnicky, Kobulnicky, Lagrois, Leitherer, M. Relaño, Malumuth, Markwardt, Massey, Massey, Massey, Mathis, Maíz-Apellániz, McCall, McGaugh, Moffat, Oey, Oey, Osterbrock, Pagel, Pellerin, Pettini, Pilyugin, Pilyugin, R. C. Kennicutt, Relaño, Roth, Savage, Schaerer, Schlegel, Stasińska, Storey, Sánchez, van den Bergh, van Dokkum, Veilleux, Viallefond, Vila-Costas, Vílchez   +67 more
core   +1 more source

Cutaneous Melanoma Drives Metabolic Changes in the Aged Bone Marrow Immune Microenvironment

Aging and Cancer, EarlyView.
Melanoma, the deadliest form of skin cancer, increasingly affects older adults. Our study reveals that melanoma induces changes in iron and lipid levels in the bone marrow, impacting immune cell populations and increasing susceptibility to ferroptosis.
Alexis E. Carey, Murilo Ramos Rocha, Cheyenne Palm, Vania Wang, Denys Balandin, Ethan Black, Kevin Y. Zhang, Fan Huang, Daniel J. Zabransky, Yash Chhabra, Mareike Peters, Gabriel Ghiaur, Ashani Weeraratna   +12 more
wiley   +1 more source

Long-Term Spectroscopic Monitoring and Surveys of Early-Type Stars with and without Circumstellar Envelopes

Open Astronomy, 2017
Ongoing studies of different groups of stars result in improving our knowledge of their fundamental parameters and evolutionary status. Also, they result in finding new phases of stellar evolution, which require theoretical explanation. At the same time,
Miroshnichenko Anatoly S., Danford Steven, Zharikov Sergei V., Manset Nadine, Levato Hugo, Grosso Monica, Korčáková Daniela, Kusakin Anatoly V., Khokhlov Serik A., Prendergast Peter   +9 more
doaj   +1 more source