| 词条 | SSSPM J1549-3544 |
| 释义 |
epoch=J2000 | constell=Lupus | ra={{RA|15|48|40.23}}[1] | dec={{DEC|-35|44|25.5}}[1] | appmag_v=14.78[1] }}{{Starbox character |{{Starbox astrometry| radial_v= | prop_mo_ra=-591[2] | prop_mo_dec=-538 | gal_lat=+14.5120 | gal_lon=338.7810 | parallax= | p_error= | absmag_v=9.5 }} |- style="vertical-align: top;" | Distance | ~350 Ly (~100 parsec){{Starbox detail | mass= | radius= | luminosity= | temperature=< 4500 | metal= | gravity= | rotation= | age= }}{{Starbox catalog |{{Starbox reference |{{Starbox end}}SSSPM J1549-3544 is a star in the constellation Lupus with high proper motion. It was initially found to have high proper motion in a 2003 survey of images taken by the optical SuperCOSMOS Sky Surveys and by the near-infrared sky surveys 2MASS and DENIS. It was then thought to be a cool white dwarf close to the Sun.[2] However, more detailed spectroscopic observations in 2005 appear to show that it is not a white dwarf, but a high-velocity halo metal-poor subdwarf.[1] References1. ^1 2 3 4 SSSPM J1549-3544 Is Not a White Dwarf, J. Farihi, P. R. Wood, and B. Stalder, Astrophysical Journal 627, #1 (July 2005), pp. L41–L43. 2. ^1 The nearest cool white dwarf (d ~4 pc), the coolest M-type subdwarf (sdM9.5), and other high proper motion discoveries, R.-D. Scholz, I. Lehmann, I. Matute, and H. Zinnecker, Astronomy and Astrophysics 425 (Oct. 2004), pp. 519–527. External links
2 : Lupus (constellation)|K-type subdwarfs |
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