scroll to top
0

EBSCO Auth Banner

Let's find your institution. Click here.

Advanced Search Results For "RED giants"

1 - 10 of 3,300 results for
 "RED giants"
Results per page:

The Metallicity and Distance of NGC 2403 from Blue Supergiants.

Publication Type: Academic Journal

Source(s): Astrophysical Journal. 11/20/2022, Vol. 940 Issue 1, p1-14. 14p.

Abstract: We present the first quantitative spectral analysis of blue supergiant stars in the nearby galaxy NGC 2403. Out of a sample of 47 targets observed with the LRIS spectrograph at the Keck I telescope we have extracted 16 B- and A-type supergiants for whi...

View details

complex stellar system M 22: confirming abundance variations with high precision differential measurements.

Publication Type: Academic Journal

Source(s): Monthly Notices of the Royal Astronomical Society. Nov2022, Vol. 516 Issue 3, p3515-3531. 17p.

Abstract: M 22 (NGC 6656) is a chemically complex globular cluster-like system reported to harbour heavy element abundance variations. However, the extent of these variations and the origin of this cluster is still debated. In this work, we investigate the chemi...

View details

Evidence for C and Mg variations in the GD-1 stellar stream.

Publication Type: Academic Journal

Source(s): Monthly Notices of the Royal Astronomical Society. Oct2022, Vol. 515 Issue 4, p5802-5812. 11p.

Abstract: Dynamically cold stellar streams are the relics left over from globular cluster dissolution. These relics offer a unique insight into a now fully disrupted population of ancient clusters in our Galaxy. Using a combination of Gaia eDR3 proper motions, o...

View details

Study of 2021 outburst of the recurrent nova RS Ophiuchi: Photoionization and morphokinematic modelling.

Publication Type: Academic Journal

Source(s): Monthly Notices of the Royal Astronomical Society. Sep2022, Vol. 515 Issue 3, p4655-4668. 14p.

Abstract: We present the evolution of the optical spectra of the 2021 outburst of RS Ophiuchi (RS Oph) over about a month after the outburst. The spectral evolution is similar to the previous outbursts. Early spectra show prominent P Cygni profiles of hydrogen B...

View details

Evolution of dipolar mixed-mode coupling factor in red giant stars: impact of buoyancy spike.

Publication Type: Academic Journal

Source(s): Monthly Notices of the Royal Astronomical Society. Sep2022, Vol. 515 Issue 3, p3853-3866. 14p.

Abstract: Mixed modes observed in red giants allow for investigation of the stellar interior structures. One important feature in these structures is the buoyancy spike caused by the discontinuity of the chemical gradient left behind during the first dredge-up. ...

View details

For how long are particles accelerated in shells of recurrent novae?

Publication Type: Academic Journal

Source(s): Monthly Notices of the Royal Astronomical Society. Sep2022, Vol. 515 Issue 2, p1644-1654. 11p.

Authors:

Abstract: Galactic novae are at present a well established class of γ-ray sources. We wonder for how long the mechanism of acceleration of electrons operates in the shells of novae. In order to put constraints on the time-scale of the electron acceleration, we c...

View details

Big, bad, and red: Giant velvet mite defenses and life strategies (Trombidiformes: Trombidiidae: Dinothrombium).

Publication Type: Academic Journal

Source(s): Journal of Arachnology. Sep2022, Vol. 50 Issue 2, p175-180. 6p.

Abstract: Giant velvet mites, the largest living mites, are a familiar sight when they are present above ground, usually after the first summer rains, in warm arid areas. Despite their often-conspicuous presence in enormous numbers, little is known about their b...

View details

Pegasus V/Andromeda XXXIV–a newly discovered ultrafaint dwarf galaxy on the outskirts of Andromeda.

Publication Type: Academic Journal

Source(s): Monthly Notices of the Royal Astronomical Society: Letters. Sep2022, Vol. 515 Issue 1, pL72-L77. 6p.

Abstract: We report the discovery of an ultrafaint dwarf in the constellation of Pegasus. Pegasus V (Peg V)/Andromeda XXXIV was initially identified in the public imaging data release of the DESI Legacy Imaging Surveys and confirmed with deep imaging from Gemini...

View details

recurrent nova V3890 Sgr: a near-infrared and optical study of the red giant component and its environment.

Publication Type: Academic Journal

Source(s): Monthly Notices of the Royal Astronomical Society. Dec2022, Vol. 517 Issue 4, p6064-6076. 13p.

Abstract: We present an analysis of the red giant component of the recurrent nova V3890 Sgr, using data obtained before and after its 2019 eruption. Its effective temperature is T eff = 3050 ± 200 K for log  g  = 0.7, although there are modest changes in T eff. ...

View details

Comprehensive catalogue of the overall best distances and properties of 402 galactic novae.

Publication Type: Academic Journal

Source(s): Monthly Notices of the Royal Astronomical Society. Dec2022, Vol. 517 Issue 4, p6150-6169. 20p.

Abstract: I derive the overall best distances for all 402 known Galactic novae, and I collect their many properties. The centrepiece is the 74 novae with accurate parallaxes from the new Gaia data release. For the needed priors, I have collected 171 distances ba...

View details
sponsored