Results 81 to 90 of about 17,300 (305)

Detection of Contact Binary Candidates Observed By TESS Using the Autoencoder Neural Network

The Astronomical Journal
A contact binary may be the progenitor of a red nova that eventually produces a merger event and have a cut-off period of around 0.2 days. Therefore, a large number of contact binaries is needed to search for the progenitor of red novae and to study the ...
Xu Ding, ZhiMing Song, ChuanJun Wang, KaiFan Ji   +3 more
doaj   +1 more source

Highlights on eclipsing binary variables from Araucaria Project

EPJ Web of Conferences, 2015
The Araucaria Project, which main goal is to provide precise determination of the cosmic distance scale, has recently made a set of discoveries involving variable stars in binary systems. Among these discoveries we highlight three: 1% precise measurement
Karczmarek Paulina, Pietrzyński Grzegorz, Gieren Wolfgang, Pilecki Bogumił, Graczyk Dariusz, Thompson Ian, Górski Marek, Konorski Piotr, Suchomska Ksenia, Nardetto Nicholas, Smolec Radoslaw   +10 more
doaj   +1 more source

Towards an Accurate Determination of Parameters for Very Massive Stars: the Eclipsing Binary LMC-SC1-105 [PDF]

, 2008
This paper presents a photometric and spectroscopic study of the bright blue eclipsing binary LMC-SC1-105, selected from the OGLE catalog as a candidate host of very massive stars (>=30Mo).
Alceste Z. Bonanos, Andersen, Bagnuolo, Bally, Bonanos, Bonanos, Bonanos, Bouret, Bromm, Claret, Derekas, Elmegreen, Faccioli, Fitzpatrick, Gies, González, Hadrava, Herrero, Hilditch, Howarth, Kelson, Krumholz, Lanz, Massey, Massey, Massey, Mayer, Maíz Apellániz, Mochnacki, Nelson, O'Connell, Oey, Pinsonneault, Prša, Ribas, Santolaya-Rey, Schaerer, Schaller, Schwarzenberg-Czerny, Simon, Soszynski, Stickland, Walborn, Zebrun   +43 more
core   +1 more source

Data‐Driven Feedback Identifies Focused Ultrasound Exposure Regimens for Improved Nanotheranostic Targeting of the Brain

Advanced Science, EarlyView.
ABSTRACT The blood‐brain barrier (BBB) renders the delivery of nanomedicine in the brain ineffective and the detection of circulating disease‐related DNA from the brain unreliable. Here, we demonstrate that microbubble‐enhanced focused ultrasound (MB‐FUS) mediated BBB opening, supported by large‐data models predict sonication regimens for safe and ...
Hohyun Lee, Victor Menezes, Shiqin Zeng, Chulyong Kim, Cynthia M. Baseman, Jae Hyun Kim, Samhita Padmanabhan, Pranav Premdas, Naima Djeddar, Anton Bryksin, Nikhil Pandey, Pavlos Anastasiadis, Anthony J. Kim, Tobey J. MacDonald, Chetan Bettegowda, Graeme F. Woodworth, Felix J. Herrmann, Costas Arvanitis   +17 more
wiley   +1 more source

Fundamental Parameters for Totally Eclipsing Contact Binaries Observed by TESS

The Astrophysical Journal
Totally eclipsing contact binaries provide a unique opportunity to accurately determine mass ratios through photometric methods alone, eliminating the need for spectroscopic data.
Xu Ding, KaiFan Ji, ZhiMing Song, XueFen Tian, JinLiang Wang, ChuanJun Wang, QiYuan Cheng, JianPing Xiong   +7 more
doaj   +1 more source

Commissioning an Inexpensive Off‐The‐Shelf Spectrograph for Radial‐Velocity Studies

Astronomische Nachrichten, EarlyView.
ABSTRACT We present a way to set up an inexpensive out of the shelf spectrograph at a local observatory. Stability and resolution of the spectrograph are high enough for radial velocity determination of binary stars or determination of stellar characteristics. Even some exoplanets might be detectable via the radial velocity method.
Lukas Stock, Andreas Schrimpf
wiley   +1 more source

KM UMa: An Active Short-period Detached Eclipsing Binary in a Hierarchical Quadruple System

The Astrophysical Journal
The first detailed photometric and spectroscopic analysis of the G-type eclipsing binary KM UMa is presented, which indicates that the system is a short-period detached eclipsing binary.
Fangbin Meng, Liying Zhu, Nianping Liu, Ping Li, Jia Zhang, Linjia Li, Azizbek Matekov   +6 more
doaj   +1 more source

The Surface Composition of Six Newly Discovered Chemically Peculiar Stars. Comparison to the HgMn Stars mu Lep and beta Scl and the Superficially Normal B Star nu Cap

The Astronomical Journal, 2023
We report on a detailed abundance study of six bright, mostly southern, slowly rotating late B-stars: HD 1279 (B8III), HD 99803 (B9V), HD 123445 (B9V), HD 147550 (B9V), HD 171961 (B8III), and HD 202671 (B5II/III), hitherto reported as normal stars.
Richard Monier, E. Niemczura, D. W. Kurtz, S. Rappaport, D. M. Bowman, Simon J. Murphy, Yveline Lebreton, Remko Stuik, Morgan Deal, Thibault Merle, T. Kılıçoğlu, M. Gebran, Ewen Le Ster   +12 more
doaj   +1 more source

Turbulence in the Atmospheres of Eclipsing Binary Stars [PDF]

International Astronomical Union Colloquium, 1980
Abstract:A review of the orbits and dimensions of the ζ Aurigae systems is given, based on photometric and spectrographic observations. The Ca II K-line has been studied intensively to determine the extent and uneven structure of the chromospheres of these stars; the multiple structure of this line observed at several eclipses confirms the presence of ...
openaire   +1 more source

‘Where are the adults?’: Troubling child‐activism and children's political participation

British Educational Research Journal, EarlyView.
Abstract Children's political participation is a well‐established theme in childhood studies. In this article we offer an original account of child activism that takes into account the entangled and emergent aspect of children as activists. We begin with a historical and a conceptual review, noting the importance of mid‐20th century developments such ...
Sharon Hunter, Claire Cassidy
wiley   +1 more source