Results 31 to 40 of about 3,156,581 (329)
HIGH-RESOLUTION CO OBSERVATION OF THE CARBON STAR CIT 6 REVEALING THE SPIRAL STRUCTURE AND A NASCENT BIPOLAR OUTFLOW [PDF]
, 2015 CIT 6 is a carbon star in the transitional phase from the asymptotic giant branch (AGB) to the protoplanetary nebulae (pPNs). Observational evidences of two point sources in the optical, circumstellar arc segments in an HC3N line emission, and a bipolar ...
Hyosun Kim +10 more
semanticscholar +1 more source
Discovery of a shell of neutral atomic hydrogen surrounding the carbon star IRC+10216 [PDF]
, 2015 We have used the Robert C. Byrd Green Bank Telescope to perform the most sensitive search to date for neutral atomic hydrogen (HI) in the circumstellar envelope (CSE) of the carbon star IRC+10216.
L. Matthews, É. Gérard, T. Bertre
semanticscholar +1 more source
Energies, 2021 Since existing residential buildings are a significant global contributor to energy consumption and greenhouse gas (GHG) emissions, any serious effort to reduce the actual energy and carbon emissions of the building sector should explicitly address the ...
Seongwon Seo, Greg Foliente
doaj +1 more source
Witnessing the emergence of a carbon star [PDF]
, 2015 During the late stages of their evolution, Sun-like stars bring the products of nuclear burning to the surface. Most of the carbon in the Universe is believed to originate from stars with masses up to a few solar masses.
L. Guzman-Ramirez +13 more
semanticscholar +1 more source
Helium enrichment and carbon-star production in metal-rich populations [PDF]
, 2014 We present new theoretical stellar evolutionary models of metal-rich asymptotic giant branch (AGB) stars. Stellar models are evolved with initial masses between 1Msun and 7Msun at Z=0.007, and 1Msun and 8Msun at Z=0.014 (solar) and at Z=0.03.
A. Karakas
semanticscholar +1 more source
Evidence of First Stars-enriched Gas in High-redshift Absorbers
The Astrophysical Journal, 2023 The first stars were born from chemically pristine gas. They were likely massive, and thus they rapidly exploded as supernovae, enriching the surrounding gas with the first heavy elements.
Andrea Saccardi +8 more
doaj +1 more source
The new carbon symbiotic star IPHAS J205836.43+503307.2 [PDF]
, 2011 We are performing a search for symbiotic stars using IPHAS, the INT Halpha survey of the northern Galactic plane, and follow-up observations. Candidate symbiotic stars are selected on the basis of their IPHAS and near-IR colours, and spectroscopy and ...
A. Englaro +36 more
core +1 more source
CXOGBS J173620.2–293338: A CANDIDATE SYMBIOTIC X-RAY BINARY ASSOCIATED WITH A BULGE CARBON STAR [PDF]
, 2013 The Galactic Bulge Survey (GBS) is a wide but shallow X-ray survey of regions above and below the Plane in the Galactic Bulge. It was performed using the Chandra X-ray Observatory's ACIS camera.
R. Hynes +12 more
semanticscholar +1 more source
A Sr-Rich Star on the Main Sequence of Omega Centauri [PDF]
, 2006 Abundance ratios relative to iron for carbon, nitrogen, strontium and barium are presented for a metal-rich main sequence star ([Fe/H]=--0.74) in the globular cluster omega Centauri. This star, designated 2015448, shows depleted carbon and solar nitrogen,
Asplund M. +7 more
core +3 more sources
CD -24_17504 revisited: a new comprehensive element abundance analysis [PDF]
, 2015 With [Fe/H] ~ -3.3, CD -24_17504 is a canonical metal-poor main sequence turn-off star. Though it has appeared in numerous literature studies, the most comprehensive abundance analysis for the star based on high resolution, high signal-to-noise spectra ...
Frebel, Anna, Jacobson, Heather R.
core +2 more sources