Results 121 to 130 of about 44,379 (345)

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

Newly discovered Wolf-Rayet and weak emission-line central stars of planetary nebulae [PDF]

, 2016
We present the spectra of 32 previously unpublished confirmed and candidate Wolf-Rayet ([WR]) and weak emission-line (WELS) central stars of planetary nebulae (CSPNe).
Miszalski, B, Frew, David, De Marco, Orsola, Sharp, Robert, Acker, A, DePew, K, Kovacevic, Anna, Parker, Quentin A   +7 more
core   +1 more source

Predictive Ability of Plasma p‐tau217 for β‐Amyloid Status: A Prospective Multicenter Study

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Plasma tau phosphorylated at threonine 217 (p‐tau217) measured with fully automated platforms has shown high accuracy for Alzheimer's disease (AD) diagnosis, but real‐world multicenter data remain limited. We aimed to validate the diagnostic performance of p‐tau217 for identifying AD pathology in a real‐world multicenter cohort ...
Miquel Massons, Nuria Guillen, Jordi Sarto, Neus Falgàs, Sergi Borrego‐Écija, Diana Esteller‐Gauxax, Magda Castellví, Adrià Tort‐Merino, Agnès Pérez‐Millan, Anna Antonell, Josep M. Augè Fradera, Gerard Piñol, Iolanda Riba, Anna Carnes‐Vendrell, Marta Cullell, Maria Teresa Osuna, Lorena Bajo, Teresa Romero, Eva Bonjoch, Joan Bello, Susana Fernández, Marta Balagué, Isabel Gómez‐Ruiz, Anuncia Boltes, Claustre Pont, Raquel Cuevas, Sara Carrillo, Laura Iglesias, Teresa Maria Casadevall Codina, Lorena Grau Guinea, Fernando Jose Espada, Raquel Sánchez‐Valle, Mircea Balasa, Albert Lladó   +33 more
wiley   +1 more source

Models of circumstellar molecular radio line emission: Mass loss rates for a sample of bright carbon stars [PDF]

, 2001
F. L. Schoeier, H. Olofsson
openalex   +1 more source

Predicting the observability of population III stars with ELT-HARMONI via the helium 1640 Å emission line [PDF]

, 2021
Kearn Grisdale, Niranjan Thatte, Julien Devriendt, M. Pereira-Santaella, Adrianne Slyz, Taysun Kimm, Yohan Dubois, Sukyoung K. Yi   +7 more
openalex   +1 more source

Thin accretion discs around neutron and quark stars [PDF]

, 2009
The possibility of observationally discriminating between various types of neutron stars, described by different equations of state of the nuclear matter, as well as differentiating neutron stars from other types of exotic objects, for example, quark ...
Harko, T, Z. Kovács, T. Harko, Cheng, KS, K. S. Cheng, Kovács, Z   +5 more
core   +1 more source

Persistent Bilateral [18F]THK5351 and Migrating Unilateral [18F]FDG Uptake in Anti‐LGI1 Encephalitis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Anti–leucine‐rich glioma‐inactivated 1 encephalitis (LGI1‐E) can cause persistent cognitive deficits, but the mechanisms remain unclear. A 40‐year‐old woman with LGI1‐E presented with subacute cognitive deficits and showed mild left medial temporal lobe (MTL) swelling and fluid‐attenuated inversion recovery (FLAIR) hyperintensity on initial ...
Yusuke Akitomi, Kenichiro Taira, Masanori Kurihara, Kenji Ishibashi, Kenji Ishii, Fumio Suzuki, Aya Midori Tokumaru, Makoto Hara, Atsushi Iwata   +8 more
wiley   +1 more source

ExoplaNeT accRetion mOnitoring sPectroscopic surveY (ENTROPY)

Astronomy & Astrophysics
Context. Observations of helium emission lines from classical T Tauri stars at high resolution (Rλ > 10 000) offer great potential, showing distinct profile characteristics that help probe regions within the accretion geometry untapped by hydrogen lines.
Viswanath Gayathri, Bonnefoy Mickaël, Dougados Catherine, Ringqvist Simon C., Janson Markus, Demars Dorian, Sicilia-Aguilar Aurora, Bouvier Jérôme, Marleau Gabriel-Dominique, Alecian Evelyne, Chauvin Gaël   +10 more
doaj   +1 more source

Weak emission line central stars of planetary nebulae

, 2018
To understand the evolution and morphology of planetary nebulae, a detailed knowledge of their central stars is required. Central stars that exhibit emission lines in their spectra, indicating stellar mass-loss allow to study the evolution of planetary ...
Peña, Miriam, Gräfener, Götz (Dr.), Todt, Helge Tobias (Dr.), Hamann, Wolf-Rainer (Prof. Dr.), Zühlke, Julia, Oskinova, Lidia M. (Dr.)   +5 more
core  

Properties of Regions Forming the FeII Emission Lines in Be Stars

, 2005
We study FeII and Balmer hydrogen emission lines observed simultaneously of 18 southern Be stars. We use the self-absorption-curve method (SAC) to determine the optical depth regime of FeII emission lines and to derive first insights on the physical properties of their forming regions.
Arias, Maria Laura, Zorec, Juan, Cidale, Lydia, Ringuelet, Adela   +3 more
openaire   +3 more sources