• Thumbnail for Subdwarf
    of blue-white subdwarfs, making two distinct categories: Cool subdwarfs Hot subdwarfs Like ordinary main-sequence stars, cool subdwarfs (of spectral types G...
    18 KB (2,112 words) - 03:00, 24 June 2025
  • Blue subdwarf may refer to: Subdwarf O star, subdwarf stars ranging above 30,000 K Subdwarf B star, subdwarf stars ranging from 10,000 to 30,000 K Blue...
    313 bytes (63 words) - 23:09, 15 July 2025
  • Thumbnail for Subdwarf B star
    A B-type subdwarf (sdB) is a kind of subdwarf star with spectral type B. They differ from the typical subdwarf by being much hotter and brighter. They...
    14 KB (1,569 words) - 15:05, 5 March 2025
  • Thumbnail for Brown dwarf
    Brown dwarf (redirect from Brown subdwarf)
    indicating low surface gravity, subdwarfs and unresolved binaries. The prefix sd stands for subdwarf and only includes cool subdwarfs. This prefix indicates a...
    167 KB (18,323 words) - 06:30, 16 July 2025
  • Thumbnail for Subdwarf O star
    A subdwarf O star (sdO) is a type of hot, but low-mass star. O-type subdwarfs are much dimmer than regular O-type main-sequence stars, but with a brightness...
    5 KB (570 words) - 19:37, 18 July 2025
  • Thumbnail for Stellar classification
    of low surface gravity, subdwarfs and unresolved binaries. The prefix sd stands for subdwarf and only includes cool subdwarfs. This prefix indicates a...
    107 KB (11,666 words) - 18:43, 18 July 2025
  • L dwarf (section Subdwarfs)
    subdwarfs to have blue near-infrared colors. 2MASS J0532+8246 was the first L-type subdwarf discovered. The prefix sd, esd and usd indicate subdwarfs...
    35 KB (3,787 words) - 22:44, 1 August 2025
  • Thumbnail for Sun
    Early Late Main sequence O B A F G K M Subdwarf O B WR OB Subgiant Giant Blue Red Yellow Bright giant Supergiant Blue Red Yellow Hypergiant Yellow Carbon...
    173 KB (19,376 words) - 05:45, 27 July 2025
  • Thumbnail for Wolf 1130
    Wolf 1130 (category M-type subdwarfs)
    1130 is a nearby pre-cataclysmic triple star system consisting of a cold subdwarf of spectral type sdM3 (A), an ultramassive white dwarf (B) and a cold brown...
    15 KB (1,336 words) - 18:42, 19 July 2025
  • Thumbnail for Blue giant
    Spectral type O B A F G K M L T Brown dwarfs White dwarfs Red dwarfs Subdwarfs Main sequence ("dwarfs") Subgiants Giants Red giants Blue giants Bright...
    11 KB (1,486 words) - 01:16, 3 March 2025
  • Thumbnail for O-type star
    than about 200M☉. Other stars in the same temperature range include rare subdwarf O-type (sdO) stars, the central stars of planetary nebulae (CSPNe), and...
    31 KB (3,364 words) - 11:11, 21 July 2025
  • Thumbnail for HD 49798
    HD 49798 (category O-type subdwarfs)
    the brightest known O class subdwarf stars. HD 49798 was discovered in 1964 to be a rare hydrogen-deficient O class subdwarf, and was the brightest known...
    9 KB (853 words) - 10:28, 18 July 2025
  • Thumbnail for Red supergiant
    Spectral type O B A F G K M L T Brown dwarfs White dwarfs Red dwarfs Subdwarfs Main sequence ("dwarfs") Subgiants Giants Red giants Blue giants Bright...
    34 KB (4,293 words) - 21:26, 19 June 2025
  • Thumbnail for Backyard Worlds
    December 2017, seven new brown dwarfs were confirmed, as well as two cool subdwarfs. The spectral types of the new brown dwarfs were T0, T2.8, T5, T6, T6...
    54 KB (5,407 words) - 06:08, 21 July 2025
  • Thumbnail for Metallicity
    ISSN 0067-0049. Sandage, A.R.; Eggen, O.J. (1959-06-01). "On the existence of subdwarfs in the (MBol, log Te)-diagram". Monthly Notices of the Royal Astronomical...
    42 KB (4,790 words) - 18:15, 8 July 2025
  • Thumbnail for Asteroseismology
    hours. Both classes of oscillators contain only slowly rotating stars. Subdwarf B (sdB) stars are in essence the cores of core-helium burning giants who...
    18 KB (2,303 words) - 00:59, 16 July 2025
  • Kepler-70 (category B-type subdwarfs)
    viewing it requires a telescope with an aperture of 40 cm (20 in) or more. A subdwarf B star, Kepler-70 passed through the red giant stage some 18.4 million...
    15 KB (1,426 words) - 19:02, 16 May 2025
  • Thumbnail for Dwarf star
    Chandrasekhar limit Dwarf planet Stellar classification Sub-brown dwarf Subdwarf Ultra-cool dwarf Brown, Laurie M.; Pais, Abraham; Pippard, A.B., eds. (1995)...
    5 KB (577 words) - 19:34, 24 April 2025
  • Thumbnail for CWISE J1249+3621
    from the sun and its spectrum is sdL1, with sd noting that it is a cool subdwarf. The star has a high tangential velocity of 524±33 km/s and a high radial...
    8 KB (757 words) - 20:36, 27 June 2025
  • Thumbnail for Red giant
    Spectral type O B A F G K M L T Brown dwarfs White dwarfs Red dwarfs Subdwarfs Main sequence ("dwarfs") Subgiants Giants Red giants Blue giants Bright...
    28 KB (3,497 words) - 22:25, 22 July 2025
  • hypothetical stage in red dwarf interstellar evolution O-type subdwarf B-type subdwarf Blue star (disambiguation) Blue giant (disambiguation) This disambiguation...
    537 bytes (101 words) - 06:56, 16 April 2025
  • Preethi (2024-11-02). "New Cold Subdwarf Discoveries from Backyard Worlds and a Metallicity Classification System for T Subdwarfs". The Astrophysical Journal...
    193 KB (12,248 words) - 14:18, 27 July 2025
  • T dwarf (section Subdwarfs)
    classification system for T subdwarfs, which allows the classification into mild subdwarfs (d/sdT), subdwarfs (sdT) and extreme subdwarfs (esdT). The signature...
    53 KB (5,536 words) - 22:41, 1 August 2025
  • Thumbnail for Variable star
    amplitudes. The prototype of this rare class is V361 Hydrae, a 15th magnitude subdwarf B star. They pulsate with periods of a few minutes and may simultaneous...
    52 KB (6,578 words) - 07:17, 4 July 2025
  • Dakota, a US state Eswatini (formerly Swaziland; SD on vehicle plates) Subdwarf, a class of star Surface detector, of cosmic rays at the Pierre Auger Observatory...
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  • Thumbnail for US 708
    US 708 (category O-type subdwarfs)
    US 708 is a hyper-velocity class O subdwarf in Ursa Major, in the halo of the Milky Way Galaxy. One of the fastest-moving stars in the galaxy, the star...
    9 KB (877 words) - 08:17, 27 April 2025
  • Thumbnail for Stellar evolution
    asymptotic-giant-branch stars. These may result in extreme horizontal-branch stars (subdwarf B stars), hydrogen deficient post-asymptotic-giant-branch stars, variable...
    50 KB (6,438 words) - 10:35, 24 July 2025
  • Thumbnail for Mu Cassiopeiae
    Mu Cassiopeiae (category G-type subdwarfs)
    for the spectral class G5Vb, although it is frequently described as a subdwarf, meaning it has a luminosity below that expected for a G5 main sequence...
    13 KB (1,224 words) - 12:55, 14 June 2025
  • Thumbnail for Star
    Early Late Main sequence O B A F G K M Subdwarf O B WR OB Subgiant Giant Blue Red Yellow Bright giant Supergiant Blue Red Yellow Hypergiant Yellow Carbon...
    148 KB (16,464 words) - 01:06, 28 June 2025
  • (2013-09-21). "Discovery of extremely lead-rich subdwarfs: does heavy metal signal the formation of subdwarf B stars?". Monthly Notices of the Royal Astronomical...
    4 KB (463 words) - 02:59, 28 April 2025