Results 31 to 40 of about 562,019 (240)

A New Method for the Asteroseismic Determination of the Evolutionary State of Red-Giant Stars [PDF]

, 2016
Determining the ages of red-giant stars is a key problem in stellar astrophysics. One of the difficulties in this determination is to know the evolutionary state of the individual stars -- i.e. have they started to burn Helium in their cores? That is the
Basu, Sarbani, Davies, Guy, Elsworth, Yvonne, Hekker, Saskia   +3 more
core   +2 more sources

Stellar loci IV. red giant stars [PDF]

Research in Astronomy and Astrophysics, 2021
Abstract In the fourth paper of this series, we present the metallicity-dependent Sloan Digital Sky Survey (SDSS) stellar color loci of red giant stars, using a spectroscopic sample of red giants in the SDSS Stripe 82 region. The stars span a range of 0.55 – 1.2 mag in color g – i, –0.3 – –2.5 in metallicity [Fe/H], and have values of ...
Zhang, Ruoyi, Yuan, Haibo, Liu, Xiaowei, Xiang, Maosheng, Huang, Yang, Chen, Bingqiu   +5 more
openaire   +2 more sources

Peripheral giant cell granuloma

Contemporary Clinical Dentistry, 2012
Peripheral giant cell granuloma or the so-called "giant cell epulis" is the most common oral giant cell lesion. It normally presents as a soft tissue purplish-red nodule consisting of multinucleated giant cells in a background of mononuclear stromal ...
Padam Narayan Tandon, S K Gupta, Durga Shanker Gupta, Sunit Kumar Jurel, Abhishek Saraswat   +4 more
doaj   +1 more source

Asteroseismology of KIC 8263801:Is it a member of NGC 6866 and a red clump star? [PDF]

, 2018
We present an asteroseismic analysis of the Kepler light curve of KIC 8263801, a red-giant star in the open cluster NGC 6866 that has previously been reported to be a helium-burning red-clump star.
Basu, Sarbani, Bellinger, Earl P., Davies, Guy R., Gai, Ning, Tang, Yanke   +4 more
core   +2 more sources

Potential Mechanism of Detoxification of Cyanide Compounds by Gut Microbiomes of Bamboo-Eating Pandas

mSphere, 2018
Gut microbes can enhance the ability of hosts to consume secondary plant compounds and, therefore, expand the dietary niche breadth of mammalian herbivores.
Lifeng Zhu, Zhisong Yang, Ran Yao, Liangliang Xu, Hua Chen, Xiaodong Gu, Tonggui Wu, Xuyu Yang   +7 more
doaj   +1 more source

TESSgiants transiting giants V – two hot Jupiters orbiting red giant hosts

Monthly Notices of the Royal Astronomical Society, 2023
ABSTRACTIn this work, we present the discovery and confirmation of two hot Jupiters orbiting red giant stars, TOI-4377 b and TOI-4551 b, observed by Transiting Exoplanet Survey Satellite in the Southern ecliptic hemisphere and later followed-up with radial-velocity (RV) observations.
Filipe Pereira, Samuel K Grunblatt, Angelica Psaridi, Tiago L Campante, Margarida S Cunha, Nuno C Santos, Diego Bossini, Daniel Thorngren, Coel Hellier, François Bouchy, Monika Lendl, Dany Mounzer, Stéphane Udry, Corey Beard, Casey L Brinkman, Howard Isaacson, Samuel N Quinn, Dakotah Tyler, George Zhou, Steve B Howell, Andrew W Howard, Jon M Jenkins, Sara Seager, Roland K Vanderspek, Joshua N Winn, Nicholas Saunders, Daniel Huber   +26 more
openaire   +4 more sources

On the Correlation Between Metallicity and the X-Shaped Morphology of the Milky Way Bulge [PDF]

, 2014
We demonstrate that failure to properly account for stellar evolution can bias results in determinations of the spatial morphology of Galactic bulge stars, focusing on the question of whether or not the X-shape is more pronounced among the more metal ...
Athanassoula, E., Cassisi, S., Nataf, David M.   +2 more
core   +3 more sources

An abundance study of red-giant-branch stars in the Hercules dwarf spheroidal galaxy [PDF]

, 2010
Using high-resolution spectroscopy, we provide a determination of [Fe/H] and [Ca/H] for confirmed red-giant branch member stars of the Hercules dwarf spheroidal galaxy.
A. Koch, Adén, Adén, Alonso, Andrievsky, Aoki, Asplund, Belokurov, Bensby, Burris, Calamida, Calamida, Clem, Cohen, D. Adén, Dotter, E. K. Grebel, Edvardsson, Feltzing, Frebel, Frebel, Fulbright, Fulbright, Geisler, Gilmore, Gratton, Gratton, Gratton, Grebel, Grevesse, Gustafsson, Hanson, Helmi, Ivans, Ivans, Johnson, K. Eriksson, Kirby, Kirby, Kirby, Koch, Koch, Koch, Koch, Kupka, Kupka, Lind, M. I. Wilkinson, Martin, Matteucci, McWilliam, McWilliam, McWilliam, Nissen, Norris, Pasquini, Piskunov, Prochaska, Reddy, Ryabchikova, Ryan, S. Feltzing, Sadakane, Schlegel, Schörck, Shetrone, Shetrone, Simon, Simon, Starkenburg, Stephens, Tollerud, Tolstoy, VandenBerg, Venn, Walker, Woosley, Zucker   +77 more
core   +1 more source

Oscillations in g-mode period spacings in red giants as a way to determine their state of evolution

EPJ Web of Conferences, 2015
In this work we consider the sensitivity of gravity-mode period spacings to sharp changes in the inner structure of red giant stars, more specifically in the buoyancy frequency inside the g-mode propagation cavity.
Cunha M. S., Stello D., Avelino P.P., Christensen-Dalsgaard J.   +3 more
doaj   +1 more source

Occurrence of the red giant flying squirrel (Petaurista petaurista: Sciuridae) in Bangladesh

Nature Conservation Research: Заповедная наука, 2018
This report confirms the presence of the red giant flying squirrel Petaurista petaurista from the Idgarh Reserve Forest in Cox's Bazar (North) Forest Division in the southern part of Bangladesh. The chestnut-red dorsal body colour, white ventral surface,
M. Tarik Kabir, M. Farid Ahsan, Ayesha Khatoon, M. Mizanur Rahman   +3 more
doaj   +1 more source