Results 71 to 80 of about 562,019 (240)

Period spacings in red giants II. Automated measurement

, 2016
The space missions CoRoT and Kepler have provided photometric data of unprecedented quality for asteroseismology. A very rich oscillation pattern has been discovered for red giants, including mixed modes that are used to decipher the red giants interiors.
Mosser, B., Samadi, R., Vrard, M.
core   +3 more sources

The Inner Halo of M87: A First Direct View of the Red-Giant Population [PDF]

, 2010
An unusually deep (V,I) imaging dataset for the Virgo supergiant M87 with the Hubble Space Telescope ACS successfully resolves its brightest red-giant stars, reaching M_I(lim) = -2.5.
Blakeslee, Blakeslee, C. Flynn, Caldwell, Ciardullo, Freedman, Gregg, Harris, Harris, Harris, Harris, Harris, Harris, Harris, J. P. Blakeslee, Jordán, Kormendy, Madrid, McConnachie, McConnachie, Mei, Mouhcine, Mouhcine, Mouhcine, Peng, Pritchet, Rejkuba, Rejkuba, Renzini, Rizzi, S. Bird, Sirianni, Stetson, Thomas, Tonry, VandenBerg, W. E. Harris, Waters, Williams, Zeilinger   +39 more
core   +1 more source

Red-giant stars in eccentric binaries

EPJ Web of Conferences, 2015
The unparalleled photometric data obtained by NASA’s Kepler Space Telescope has led to improved understanding of red-giant stars and binary stars. We discuss the characterization of known eccentric system, containing a solar-like oscillating red-giant ...
Beck P. G., Hambleton K., Vos J., Kallinger T., Garcia R. A., Mathur S., Houmani K.   +6 more
doaj   +1 more source

First report of Blastocystis in giant pandas, red pandas, and various bird species in Sichuan province, southwestern China

International Journal for Parasitology: Parasites and Wildlife, 2019
Blastocystis is a common enteric protist that colonizes humans and a wide range of animals. Although some studies have reported incidences of Blastocystis in humans and animals in China, there is no information available on the prevalence of Blastocystis
Lei Deng, Jing-Xin Yao, Hai-Feng Liu, Zi-Yao Zhou, Yi-Jun Chai, Wu-You Wang, Zhi-Jun Zhong, Jun-Liang Deng, Zhi-Hua Ren, Hua-Lin Fu, Xia Yan, Chan-Juan Yue, Guang-Neng Peng   +12 more
doaj   +1 more source

Measuring the core rotation of red giant stars

, 2016
Red giant stars present mixed modes, which behave as pressure modes in the convective envelope and as gravity modes in the radiative interior. This mixed character allows to probe the physical conditions in their core.
Gehan, Charlotte, Michel, Eric, Mosser, Benoît   +2 more
core  

Probing the core structure and evolution of red giants using gravity-dominated mixed modes observed with Kepler

, 2012
We report for the first time a parametric fit to the pattern of the \ell = 1 mixed modes in red giants, which is a powerful tool to identify gravity-dominated mixed modes.
Aizenman, B. Mosser, Baudin, Baudin, Beck, Beck, Bedding, Bedding, Borucki, Brassard, Brown, C. Barban, C. J. Burke, Campante, Carrier, Chaplin, Chaplin, Christensen-Dalsgaard, D. Stello, De Ridder, Deheuvels, Deheuvels, di Mauro, Dupret, Dziembowski, Dziembowski, E. Michel, García, Gilliland, Hekker, Hekker, Huber, J. De Ridder, J. P. Marques, Jenkins, Jiang, K. Belkacem, Kallinger, Koch, Ledoux, M. C. Stumpe, M. J. Goupil, Mathur, Mathur, Miglio, Morel, Mosser, Mosser, Mosser, Mosser, Mosser, Mosser, P. G. Beck, Pablo, R. A. García, R. Samadi, S. Hekker, Shibahashi, T. Barclay, T. Kallinger, T. R. Bedding, Tassoul, Verner, White, White, Y. Elsworth   +65 more
core   +3 more sources

Li Evolution among Stars of Low/Intermediate Mass: the Metal-deficient Open Cluster NGC 2204

The Astronomical Journal
We have analyzed high-dispersion spectra in the Li 6708 Å region for 167 stars within the anticenter cluster NGC 2204. From 105 probable members, abundance analysis of 45 evolved stars produces [Fe/H] = −0.40 ± 0.12, [Si/Fe] = 0.14 ± 0.12, [Ca/Fe] = 0.29
Barbara J. Anthony-Twarog, Constantine P. Deliyannis, Aaron Steinhauer, Qinghui Sun, Bruce A. Twarog   +4 more
doaj   +1 more source

Simulations of the symbiotic recurrent nova V407 Cyg. I. Accretion and shock evolutions

, 2015
The shock interaction and evolution of nova ejecta with a wind from a red giant star in a symbiotic binary system are investigated via three-dimensional hydrodynamics simulations.
Pan, Kuo-Chuan, Ricker, Paul M., Taam, Ronald E.   +2 more
core   +1 more source

Red Clump stars in Kepler open cluster NGC 6819

EPJ Web of Conferences, 2015
We measure the large frequency separation, Δν, and the frequency of maximum amplitude, νmax, for 10 Red Clump (RC) single member (SM) stars in the Kepler open cluster NGC 6819. We derive luminosities and masses for each individual RC star.
Abedigamba O.P., Balona L.A., Medupe T.R.   +2 more
doaj   +1 more source

Revisiting the Activity–Rotation Relation for Evolved Stars

The Astrophysical Journal
The magnetic dynamo mechanism of giant stars remains an open question, which can be explored by investigating their activity–rotation relations with multiple proxies. By using the data from the LAMOST and Galaxy Evolution Explorer surveys, we carried out
Henggeng Han, Song Wang, Xue Li, Chuanjie Zheng, Jifeng Liu   +4 more
doaj   +1 more source