Results 21 to 30 of about 3,080,831 (379)
A Dramatic Decrease in Carbon Star Formation in M31 [PDF]
Astrophysical Journal, 2019 We analyze resolved stellar near-infrared photometry of 21 Hubble Space Telescope (HST) fields in M31 to constrain the impact of metallicity on the formation of carbon stars. Observations of nearby galaxies show that carbon stars are increasingly rare at
M. Boyer +10 more
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Carbon-bearing Molecules in a Possible Hycean Atmosphere [PDF]
Astrophysical Journal Letters, 2023 The search for habitable environments and biomarkers in exoplanetary atmospheres is the holy grail of exoplanet science. The detection of atmospheric signatures of habitable Earth-like exoplanets is challenging owing to their small planet–star size ...
N. Madhusudhan +5 more
semanticscholar +1 more source
Carbon star wind models at solar and sub-solar metallicities: a comparative study [PDF]
Astronomy & Astrophysics, 2019 Context. The heavy mass loss observed in evolved stars on the asymptotic giant branch (AGB) is usually attributed to dust-driven winds, but it is still an open question how much AGB stars contribute to the dust production in the interstellar medium ...
S. Bladh +4 more
semanticscholar +1 more source
Discovery of water vapour in the carbon star V Cygni from observations withHerschel/HIFI [PDF]
, 2010 We report the discovery of water vapour toward the carbon star V Cygni. We have used Herschel's HIFI instrument, in dual beam switch mode, to observe the 1(11)-0(00) para-water transition at 1113.3430 GHz in the upper sideband of the Band 4b receiver ...
David A. Neufeld +27 more
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A rich hydrocarbon chemistry and high C to O ratio in the inner disk around a very low-mass star [PDF]
Nature Astronomy, 2023 Highly abundant hydrocarbons in a very low-mass star’s disk are detected using the JWST. This unique chemical composition is probably due to the destruction of carbon grains, and the resulting high gaseous C/O ratio may have a profound impact on the ...
B. Tabone +45 more
semanticscholar +1 more source
No thick carbon dioxide atmosphere on the rocky exoplanet TRAPPIST-1 c [PDF]
Nature, 2023 Seven rocky planets orbit the nearby dwarf star TRAPPIST-1, providing a unique opportunity to search for atmospheres on small planets outside the Solar System^ 1 . Thanks to the recent launch of the James Webb Space Telescope (JWST), possible atmospheric
Sebastian Zieba +18 more
semanticscholar +1 more source
Mathematics, 2023 Under the global consensus of carbon peaking and carbon neutrality, new energy vehicles have gradually become mainstream, driven by the dual crises regarding the atmospheric environment and energy security.
Sumin Yu +3 more
doaj +1 more source
Symposium - International Astronomical Union, 1994 More than 1000 new carbon stars have been identified in a ∼200 deg2 area of the SMC during a survey of UK Schmidt Telescope objective-prism plates. Their spatial distribution is like that of the red horizontal branch stars.
D. Hatzidimitriou, D. H. Morgan
openaire +2 more sources
High angular resolutionN-band observation of the silicate carbon star IRAS08002-3803 with the VLTI/MIDI instrument [PDF]
, 2006 We present the results of N-band spectro-interferometric observations of the silicate carbon star IRAS08002-3803 with the MID-infrared Interferometric instrument (MIDI) at the Very Large Telescope Interferometer (VLTI) of the European Southern ...
K. Ohnaka +12 more
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HIGH-SPEED BULLET EJECTIONS DURING THE AGB-TO-PLANETARY NEBULA TRANSITION: HST OBSERVATIONS OF THE CARBON STAR, V HYDRAE [PDF]
, 2016 The well-studied carbon star, V Hya, showing evidence for high-speed, collimated outflows and dense equatorial structures, is a key object in the study of the poorly understood transition of AGB stars into aspherical planetary nebulae.
R. Sahai, S. Scibelli, M. Morris
semanticscholar +1 more source