Results 61 to 70 of about 8,510,179 (297)

Late-type stars found in the FBS. New carbon stars

, 2008
We present new observations of seven late-type stars previously discovered in the First Byurakan Survey (FBS). These observations prove that they belong to the family of carbon (C) stars. Seventy-nine similar FBS C stars were previously known.
D. Engels, V. V. Hambaryan, ROSSI, Corinne, K. S. Gigoyan, N. Mauron, R. Gualandi   +5 more
core   +1 more source

Carbon in J0815+4729: Casting a shadow of doubt on the interpretation of CH absorption in the most primitive stars

Astronomy & Astrophysics
Aims. We revisit the carbon abundance in the primitive iron-poor star J0815+4729 ([Fe/H] = −5.49). J0815+4729 is so enhanced in carbon and rich in oxygen that, in addition to the CH and C2 molecular lines, weaker neutral atomic transitions are measurable
Zhang Junbo, Allende Prieto Carlos, Osorio Yeisson, González Hernández Jonay I., Aguado David S., Hubeny Ivan, Liu Shuai, Shi Jianrong, Rebolo Rafael, Zhao Gang   +9 more
doaj   +1 more source

Spectroscopic distances to late-type stars [PDF]

Proceedings of the International Astronomical Union, 2012
AbstractA common approach to determining distances to stars without astrometric information is to compare stellar evolution models with parameters obtained from spectroscopic techniques. This method is routinely applied in the context of large-scale stellar surveys out to distances of several kpc.
Bergemann, M., Serenelli, A., Ruchti, G.
openaire   +2 more sources

Bone and Soft Tissue Neoplasms in Infants Versus Older Children: A Report From the Cancer in Young People in Canada Program

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background and Aims Infant bone and soft tissue neoplasms present distinct clinical challenges and lack large‐scale data to inform treatment decisions. This study aims to characterize bone and soft tissue neoplasms in infants in Canada and to compare their outcomes with those of older pediatric patients.
Samuel Sassine, Hallie Coltin, Maria Kondyli, Monia Marzouki, Nicolas Prud'homme, Nida Usmani, Rebecca J. Deyell, Lesleigh Abbott, Tony H. Truong, Sapna Oberoi, Ketan Kulkarni, Josée Brossard, Lynette Bowes, Paul Gibson, Sarah McKillop, Roona Sinha, Lillian Sung, Catherine Vezina, Laura Wheaton, Alexandra P. Zorzi, Marie‐Claude Pelland‐Marcotte, Thai Hoa Tran   +21 more
wiley   +1 more source

Impact of Spectral Resolution on S-index and Its Application to Spectroscopic Surveys

The Astrophysical Journal
Utilizing the PHOENIX synthetic spectra, we investigated the impact of spectral resolution on the calculation of S -indices. We found that for spectra with a resolution lower than ≈30,000, it is crucial to calibrate S -indices for accurate estimations ...
Henggeng Han, Song Wang, Xue Li, Chuanjie Zheng, Jifeng Liu   +4 more
doaj   +1 more source

The average X-ray spectrum of the volume-complete M-, F-, G-, and K-type star sample within 10 pc of the Sun

Astronomy & Astrophysics
Context. The F-, G-, K-, and M-type stars are the most abundant stellar population in the Milky Way and are expected to contribute to its diffuse X-ray emission.
Zheng Xueying, Ponti Gabriele, Locatelli Nicola, Stelzer Beate, Magaudda Enza, Dennerl Konrad, Freyberg Michael J., Sanders Jeremy, Caramazza Marilena, Sasaki Manami, Merloni Andrea, Robrade Jan, Liu Teng, Zhang He-shou, Mayer Martin G. F., Zhang Yi, Yeung Michael C. H., Becker Werner   +17 more
doaj   +1 more source

Establishing an Apheresis Medicine Program in a Resource‐Constrained Setting: A 5‐Year Experience From Lagos, Nigeria

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Establishing a comprehensive apheresis medicine program in a resource‐constrained setting presents significant structural, financial, and logistical challenges. Despite the growing clinical importance of apheresis services globally, published experience from sub‐Saharan Africa remains sparse.
Folasade Adelekan‐Popoola, Shakirat Gold‐Olufadi, Olufunto Olufela Kalejaiye, Abdullateef Ogala, Rasheed A. Balogun   +4 more
wiley   +1 more source

The Wolf-Rayet stars in M31 I. Analysis of the late-type WN stars

, 2014
Context. Comprehensive studies of Wolf-Rayet stars were performed in the past for the Galactic and the LMC population. The results revealed significant differences, but also unexpected similarities between the WR populations of these different galaxies ...
Sander, Andreas Alexander Christoph, Hainich, Rainer, Todt, Helge Tobias (Dr.), Hamann, Wolf-Rainer (Prof. Dr.)   +3 more
core   +1 more source

Sub-second cadence structure of optical flares on AD Leo

Astronomy & Astrophysics
Context. Stellar flares are sudden brightenings caused by magnetic reconnection and are frequently observed on late-type stars. High-cadence photometry of flares provides valuable insights into the mechanisms of these events, yet such observations remain
Schmercz B., Seli B., Vida K., Kriskovics L., Görgei A., Oláh K., Regály Zs.   +6 more
doaj   +1 more source

Organoids in pediatric cancer research

FEBS Letters, EarlyView.
Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley   +1 more source