Results 21 to 30 of about 182,899 (301)

DUST IS FORMING ALONG THE RED GIANT BRANCH OF 47 Tuc [PDF]

The Astrophysical Journal, 2010
We present additional evidence that dust is really forming along the red giant branch (RGB) of 47 Tuc at luminosities ranging from above the horizontal branch to the RGB-tip (Origlia et al. 2007). The presence of dust had been inferred from an infrared excess in the (K-8) color, with K measured from high spatial resolution ground based near-IR ...
L. Origlia, Robert T. Rood, S. Fabbri, F. R. Ferraro, F. Fusi Pecci, R. Michael Rich, E. Dalessandro   +6 more
openalex   +6 more sources

Acoustic oscillations in stars near the tip of the red giant branch [PDF]

Astronomy & Astrophysics, 2010
Small amplitude oscillations are observed in red giant branch (RGB) stars. Data on such oscillations are a source of information about the objects, notably about properties of convection in their envelopes and about the systems these objects inhabit. The OGLE-III catalog contains data for about 80 thousand small amplitude variable red giants (OSARGs ...
W. A. Dziembowski, I. Soszyński
openalex   +5 more sources

Hubble Space TelescopeObservations of the Large Magellanic Cloud Field around SN 1987A: Distance Determination with Red Clump and Tip of the Red Giant Branch Stars [PDF]

, 2000
We have used HST-WFPC2 multiband observations of a field around SN 1987A in the Large Magellanic Cloud to measure its distance from the Sun. The observations allowed us to carefully determine the interstellar extinction along the line of sight to a large
M. Romaniello, M. Salaris, S. Cassisi, N. Panagia   +3 more
openalex   +4 more sources

Red variables in the OGLE-II data base - I. Pulsations and period-luminosity relations below the tip of the red giant branch of the Large Magellanic Cloud [PDF]

, 2003
We present period-luminosity relations for more than 23,000 red giants in the Large Magellanic Cloud observed by the OGLE-II microlensing project. The OGLE period values were combined with the 2MASS single-epoch JHK photometric data.
L. L. Kiss, T. R. Bedding
openalex   +3 more sources

The Aarhus red giants challenge [PDF]

Astronomy & Astrophysics, 2020
Contact. The large quantity of high-quality asteroseismic data that have been obtained from space-based photometric missions and the accuracy of the resulting frequencies motivate a careful consideration of the accuracy of computed oscillation frequencies of stellar models, when applied as diagnostics of the model properties. Aims.
Christensen-Dalsgaard, Jørgen, Christensen-Dalsgaard, Jørgen, Silva Aguirre, Víctor, Silva Aguirre, Víctor, Miller Bertolami, Marcelo M., Miller Bertolami, Marcelo M., Serenelli, A., Serenelli, A., Stello, Dennis, Stello, Dennis, Weiss, A., Weiss, A., Angelou, George, Angelou, George, Jiang, Chen, Jiang, Chen, Lebreton, Yveline, Lebreton, Yveline, Spada, Federico, Spada, Federico, Bellinger, E. P., Bellinger, E. P., Deheuvels, Sébastien, Deheuvels, Sébastien, Ouazzani, R.-M., Ouazzani, R.-M., Pietrinferni, A., Pietrinferni, A., Mosumgaard, Jakob R., Mosumgaard, Jakob R., Townsend, Richard H. D., Townsend, Richard H. D., Battich, Tiara, Bossini, Diego, Constantino, Thomas N., Eggenberger, P., Hekker, Saskia, Mazumdar, A., Miglio, Andrea, Nielsen, K. B., Salaris, M.   +40 more
openaire   +18 more sources

Characterisation of red-giant stars in the public Kepler data [PDF]

, 2011
The first public release of long-cadence stellar photometric data collected by the NASA Kepler mission has now been made available. In this paper we characterise the red-giant (G-K) stars in this large sample in terms of their solar-like oscillations. We
Chaplin, W. J., De Ridder, J., Elsworth, Y., Gilliland, R. L., Hekker, S., Ibrahim, K. A., Kallinger, T., Klaus, T. C., Li, J., Stello, D.   +9 more
core   +9 more sources

Model Choice Matters for Age Inference on the Red Giant Branch

The Astrophysical Journal
Galactic archaeology relies on accurate stellar parameters to reconstruct the Galaxy's history, including information on stellar ages. While the precision of data has improved significantly in recent years, stellar models used for age inference have not ...
Leslie M. Morales, Jamie Tayar, Zachary R. Claytor   +2 more
doaj   +3 more sources

Evidence that Mass Loss on the Red Giant Branch Decreases with Metallicity

The Astrophysical Journal
Mass loss on the red giant branch (RGB) influences stellar evolution, properties of stellar populations, and Galactic chemical enrichment, yet remains poorly constrained observationally. Current models provide limited insight into how stellar properties,
Yaguang Li
doaj   +3 more sources

Surface effects on the red giant branch [PDF]

Monthly Notices of the Royal Astronomical Society, 2018
13 pages, 7 figures, accepted in ...
Saskia Hekker, Saskia Hekker, Nathalie Themeßl, Nathalie Themeßl, Nathalie Themeßl, Warrick H. Ball, Warrick H. Ball   +6 more
openaire   +5 more sources

Inferring Coupling Strengths of Mixed-mode Oscillations in Red Giant Stars Using Deep Learning

The Astrophysical Journal, 2023
Asteroseismology is a powerful tool that may be applied to shed light on stellar interiors and stellar evolution. Mixed modes, behaving like acoustic waves in the envelope and buoyancy modes in the core, are remarkable because they allow for probing the ...
Siddharth Dhanpal, Othman Benomar, Shravan Hanasoge, Masao Takata, Subrata Kumar Panda, Abhisek Kundu   +5 more
doaj   +1 more source