carbon star


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carbon star

[′kär·bən ‚stär]
(astronomy)
Any of a class of stars with an apparently high abundance ratio of carbon to hydrogen; a majority of these are low-temperature red giants of the C class.
References in periodicals archive ?
Using results from the early infrared satellites, Tom found that certain carbon stars invisible at ordinary wavelengths and having anomalous quantities of silicon-rich dust emitting at 9.7[micro]m (expected from oxygen-rich rather than carbon-rich giants) have relatively high abundances of the heavier carbon isotope [sup.13]CO.
At magnitude 7.5 it's easily visible in any scope or binoculars, and it's noticeably red (although not as red as a carbon star!).
Object Type RA (J2000.0) Dec RT Capricorni Carbon Star 20h17m2 -21[degrees]20 NGC 6908 Nebulosity 20 25 1 -24 48 NGC 6907 Galaxy 20 25 6 -24 49 Asterism Star Group 20 26 7 -24 57 NGC 7099, M 30 Globular Cluster 21 40 4 -23 11 Palomar 12 Globular Cluster 21 46 6 -21 15 NGC 7158 Unknown 21 57 4 -11 36 Object Type Mag Size RT Capricorni Carbon Star 7-11 * NGC 6908 Nebulosity 14 0.5' x 0.3' NGC 6907 Galaxy 11 3.2' x 2.3' Asterism Star Group 8 10' NGC 7099, M 30 Globular Cluster 6.9 9' Palomar 12 Globular Cluster 11.7 2.9' NGC 7158 Unknown 9.5 ' x 6'
U Antliae in the far southern skies is a deep red carbon star, varying around a central magnitude of 6.5.
Skrutskie of the University of Virginia in Charlottesville and Martin Weinberg of the University of Massachusetts zeroed in on carbon stars, the brilliant, final stage of stars that weigh one to four times as much as the sun.
A row of three 7th- to 8th-magnitude stars arcs between 12 Aql and Lambda ([lambda]), pointing to the noticeably red carbon star V Aql to the southeast and B130 to the northwest.
Object Type RA (J2000.0) Dec GN 02.34.4 Emission Neb 0[2.sup.6] 36.1 -53[degrees]03' NGC 1252 Open Cluster 03 11.4 -57 38 NGC 1261 Glob Cluster 03 12.3 -55 13 TW Horologii Carbon star 03 12.6 -57 19 NGC 1433 Galaxy 03 42.0 -47 13 NGC 1448 Galaxy 03 44.5 -44 39 Arp Madore 1 Glob Cluster 03 55.0 -49 36 NGC 1510 Galaxy 04 03.5 -43 24 NGC 1512 Galaxy 04 03.9 -43 21 Object Mag Size GN 02.34.4 8.3 250" NGC 1252 8.4 20' NGC 1261 8.3 6.8' TW Horologii 5.7 NGC 1433 9.9 6.5' x 5.9' NGC 1448 10.7 7.6' x 1.7' Arp Madore 1 15.0 1' NGC 1510 12.7 0.9' x 0.9' NGC 1512 10.3 8.9' x 5.6'
astronomy clubs) runs a Carbon Star Observing Program, at http:// is.gd/alcarbonstars, with award certificate and pin.
Y CVn is the second-brightest carbon star, topped only by autumn's 19 Piscium (TX Psc).
carbon star that varies from magnitude 9.9 to 12.7.
The star 19 Piscium is interesting in its own right; it's a carbon star (deep red) and an irregular, low-amplitude variable--hence its alternate name TX Piscium.
the carbon star V Aquilae, one of the reddest stars visible in a