Results 51 to 60 of about 166,438,504 (289)

Fundamental Parameters of 10 Ap-Stars [PDF]

, 2023
Представлен результат самосогласованного анализа спектров высокого разрешения для 10 Aр-звезд в диапазоне эффективных температур 7 000—11 000 К. Получены фундаментальные параметры звезд, определен химический состав их атмосфер и оценена стратификация ...
Романовская, А. М., Romanovskaya, A. M.   +1 more
core  

FUNDAMENTAL PARAMETERS OF SUPERGIANT STAR HD 40589 (A0Iab)

Odessa Astronomical Publications, 2023
The atmosphere of HD 40589 (A0Iab) supergiant star of A spectral class was studied using the model atmosphere and parallax methods. The effective temperatures (Teff) and surface of gravity (log g) were determined using a comparison of the observed and  calculated values of the photometric quantities [c1], Q and the equivalent widths of the hydrogen ...
Z. A. Samedov, U. R. Rustem, G. M. Hajiyeva, Z. F. Aliyeva   +3 more
openaire   +3 more sources

Three Ultra-short-period Contact Eclipsing Binary Systems Mined from Massive Astronomical Surveys

The Astronomical Journal, 2023
We present the photometric analysis of three ultra-short-period total eclipsing binaries in contact configuration, CRTS_J172718.0+431624, OGLE-BLG-ECL-000104, and OGLE-BLG-ECL-000012, mined from massive astronomical surveys.
Athanasios Papageorgiou, Panagiota-Eleftheria Christopoulou, C. E. Ferreira Lopes, Eleni Lalounta, Márcio Catelan, Andrew J. Drake   +5 more
doaj   +1 more source

Fundamental Parameters : Normal A0 Dwarf Stars of the Solar Neighbourhood [PDF]

Highlights of Astronomy, 1998
The purpose of this paper is to define a set of “standard”, “reference” or “comparison” stars, according to their use, of spectral type A0V in order to be used for further studies in the domain of peculiar stars as well as normal stars of thisTeffand luminosity range.
M. Gerbaldi, R. Faraggiana, R. Burnage, F. Delmas, A. Gomez, S. Grenier   +5 more
openaire   +1 more source

Ovarian Sex Cord Stromal Tumors in Children and Adolescents—The European Standard Clinical Practice Recommendations

Pediatric Blood &Cancer, EarlyView.
ABSTRACT As part of the European Cooperative Study Group for Paediatric Rare Tumours initiative, we developed standard clinical practice guidelines for ovarian sex cord stromal tumors, based on comprehensive national and international cohort analyses, literature review, and a final expert consensus conference.
Dominik T. Schneider, Kris‐Ann Schultz, Nora Schnitzler, Michael Abele, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Ines B. Brecht, Maja Cesen, Andrea Ferrari, Michaela Kuhlen, Malgorzata A. Krawczyk, Ricardo Lopez‐Almaraz, Yves Reguerre, Calogero Virgone, Daniel Orbach   +15 more
wiley   +1 more source

Hidden Companions Detected by Asteroseismology. II. A Long-period Noneclipsing Binary System Revealed by Kepler and TESS

The Astrophysical Journal Letters, 2023
The detection of long-period binary stars containing a δ Scuti variable is helpful to study the formation and evolution of binaries in the intermediate-mass region.
Xin Lyu, Ming Yang
doaj   +1 more source

Acute Neurological Events in Children With Hemoglobin SC Disease: A Multicenter Retrospective Study

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Introduction Neurological manifestations in children with hemoglobin SC (HbSC) disease remain insufficiently characterized, particularly regarding acute events. The aim of this study was to describe the spectrum and frequency of acute neurological events in a multicenter cohort of children with HbSC disease.
Célia Paulmin, Bérengère Koehl, Audrey Maudoux, Hanine Mansour, Marie‐Hélène Odievre, Nathalie Garrec, Emilie Georget, Cécile Arnaud, Slimane Allali, Lydia Doumdo, Marie Belloy, Corinne Guitton   +11 more
wiley   +1 more source

A Large Catalog of DA White Dwarf Characteristics Using SDSS and Gaia Observations

The Astrophysical Journal
We present a catalog of 8545 and 19,257 unique DA white dwarfs (WDs) observed in Sloan Digital Sky Survey (SDSS) Data Release 19 and previous SDSS data releases, respectively. This is the largest catalog of both spectroscopic and photometric measurements
Nicole R. Crumpler, Vedant Chandra, Nadia L. Zakamska, Gautham Adamane Pallathadka, Stefan Arseneau, Nicola Gentile Fusillo, J. J. Hermes, Carles Badenes, Priyanka Chakraborty, Boris T. Gänsicke, Sean Morrison, Hans-Walter Rix, Stephen P. Schmidt, Axel Schwope, Keivan G. Stassun   +14 more
doaj   +1 more source

The radius and other fundamental parameters of the F9 V star β Virginis [PDF]

Monthly Notices of the Royal Astronomical Society, 2009
We have used the Sydney University Stellar Interferometer (SUSI) to measure the angular diameter of the F9 V star beta Virginis. After correcting for limb darkening and combining with the revised Hipparcos parallax, we derive a radius of 1.703 +/- 0.022 R_sun (1.3%).
North, J. R., Davis, C. J., Robertson, J. G., Bedding, Timothy R., Bruntt, H., Ireland, Michael J., Jacob, A. P., Lacour, Sylvestre, O'Byrne, J. W., Owens, S. M., Stello, Dennis, Tango, W. J., Tuthill, Peter G.   +12 more
openaire   +3 more sources

Atmospheric and Fundamental Parameters of Eight Nearby Multiple Stars

The Astronomical Journal, 2022
Abstract We present the complete set of atmospheric and fundamental parameters, in addition to the masses, for the individual components of eight stellar systems. The list of the systems, whose orbital solutions were published recently, includes seven binaries (HIP 14524, HIP 16025, HIP 46199, HIP 47791, HIP 60444, HIP 61100, HIP 73085 ...
Abdallah M. Hussein, Mashhoor A. Al-Wardat, Ahmad Abushattal, Hatem S. Widyan, Enas M. Abu-Alrob, Oleg Malkov, Martin A. Barstow   +6 more
openaire   +1 more source