Results 31 to 40 of about 2,275,942 (365)

Carbon-deficient Red Giants [PDF]

The Astrophysical Journal, 2019
Abstract Carbon-deficient red giants (CDRGs) are a rare class of peculiar red giants, also called “weak G-band” or “weak CH” stars. Their atmospheric compositions show depleted carbon, a low isotopic ratio, and an overabundance of nitrogen, indicating that the material at ...
Howard E. Bond, Howard E. Bond
openaire   +4 more sources

TESS asteroseismology of the Kepler red giants [PDF]

Monthly Notices of the Royal Astronomical Society, 2022
ABSTRACTRed giant asteroseismology can provide valuable information for studying the Galaxy as demonstrated by space missions like CoRoT and Kepler. However, previous observations have been limited to small data sets and fields of view. The TESS mission provides far larger samples and, for the first time, the opportunity to perform asteroseimic ...
Stello, Dennis, Saunders, Nicholas, Grunblatt, Sam, Hon, Marc, Reyes, Claudia, Huber, Daniel, Bedding, Timothy, Elsworth, Yvonne, García, Rafael, Hekker, Saskia, Kallinger, Thomas, Mathur, Savita, Mosser, Benoit, Pinsonneault, Marc   +13 more
openaire   +5 more sources

Characterization of the gut microbiota in the red panda (Ailurus fulgens). [PDF]

PLoS ONE, 2014
The red panda is the only living species of the genus Ailurus. Like giant pandas, red pandas are also highly specialized to feed mainly on highly fibrous bamboo.
Fanli Kong, Jiangchao Zhao, Shushu Han, Bo Zeng, Jiandong Yang, Xiaohui Si, Benqing Yang, Mingyao Yang, Huailiang Xu, Ying Li   +9 more
doaj   +1 more source

Axion and neutrino bounds improved with new calibrations of the tip of the red-giant branch using geometric distance determinations

Physical Review D, 2020
The brightness of the tip of the red-giant branch (TRGB) allows one to constrain novel energy losses that would lead to a larger core mass at helium ignition and thus to a brighter TRGB than expected by standard stellar models. The required absolute TRGB
F. Capozzi, G. Raffelt
semanticscholar   +1 more source

Consistent Calibration of the Tip of the Red Giant Branch in the Large Magellanic Cloud on the Hubble Space Telescope Photometric System and a Redetermination of the Hubble Constant [PDF]

Astrophysical Journal, 2019
We present a calibration of the tip of the red giant branch (TRGB) in the Large Magellanic Cloud (LMC) on the Hubble Space Telescope (HST)/ACS F814W system.
W. Yuan, A. Riess, L. Macri, S. Casertano, D. Scolnic   +4 more
semanticscholar   +1 more source

Variable Red Giants [PDF]

Proceedings of the International Astronomical Union, 2011
AbstractThe longest-known class of pulsating variable stars, namely pulsating red giants, is also the one that involves the most complex physical processes. Pulsation, mass loss, nuclear synthesis, mixing, atmospheric and circumstellar chemistry and dust formation all interrelate with one another and make both the observational studies and the ...
Franz Kerschbaum, Walter Nowotny
openaire   +2 more sources

Illumination in symbiotic binary stars: Non-LTE photoionization models. II. Wind case [PDF]

, 1997
We describe a non-LTE photoionization code to calculate the wind structure and emergent spectrum of a red giant wind illuminated by the hot component of a symbiotic binary system.
Almog Y., Altamore A., Bauer W. H., Bell K. R., Crowther P. A., Daniel Proga, John C. Raymond, Jordan S., Kenny H. T., Kirsch T., Livio M., Munari U., Murset U., Murset U., Nussbaumer H., Nussbaumer H., Nussbaumer H., Nussbaumer H., Nussbaumer H., Nussbaumer H., Pauldrach A., Proga D., Ruffert M., Schmid H. M., Schwank M., Scott J. Kenyon, Smith V. V., van Buren D., Vogel M., Vogel M., Vogel M., Vogel M., Wallerstein G., Whitelock P. A., Willson L. A.   +34 more
core   +3 more sources

Core rotation braking on the red giant branch for various mass ranges [PDF]

Astronomy & Astrophysics, 2018
Context. Asteroseismology allows us to probe stellar interiors. In the case of red giant stars, conditions in the stellar interior are such as to allow for the existence of mixed modes, consisting in a coupling between gravity waves in the radiative ...
C. Gehan, B. Mosser, E. Michel, R. Samadi, T. Kallinger   +4 more
semanticscholar   +1 more source

Comparative study of the digestion and metabolism related genes’ expression changes during the postnatal food change in different dietary mammals

Frontiers in Genetics, 2023
The changes in the expression of genes related to digestion and metabolism may be various in different dietary mammals from juvenile to adult, especially, the giant panda (Ailuropoda melanoleuca) and red panda (Ailurus fulgens), which were once ...
Zhuma Yizhen, Lei Chen, Xiaodie Jie, Fujun Shen, Liang Zhang, Yusen Hou, Lu Li, Guoqiang Yan, Xiuyue Zhang, Zhisong Yang   +9 more
doaj   +1 more source

Weighing the stellar constituents of the galactic halo with APOGEE red giant stars [PDF]

Monthly notices of the Royal Astronomical Society, 2019
The stellar mass in the halo of the Milky Way is notoriously difficult to determine, owing to the paucity of its stars in the solar neighbourhood. With tentative evidence from Gaia that the nearby stellar halo is dominated by a massive accretion event –
J. Mackereth, J. Bovy
semanticscholar   +1 more source