SSSPM J1549-3544

SSSPM J1549-3544
Observation data; Epoch J2000 Equinox J2000
Constellation	Lupus
Right ascension	15h 48m 40.172s
Declination	−35° 44′ 26.17″
Apparent magnitude (V)	14.78
Characteristics
Spectral type	sdK5
Astrometry
Proper motion (μ)	RA: −597.714 mas/yr ; Dec.: −535.841 mas/yr
Parallax (π)	10.4127 ± 0.0214 mas
Distance	313.2 ± 0.6 ly ; (96.0 ± 0.2 pc)
Absolute magnitude (MV)	9.5
Details
Radius	0.30 R☉
Luminosity	0.02 L☉
Surface gravity (log g)	5.0 cgs
Temperature	3,956 K
Metallicity	−1.28 dex
Other designations
	SSSPM J1549-3544, 2MASS J15484023-3544254
Database references
SIMBAD	data

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.^[3] 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.^[2]

References

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
^ ^a ^b ^c Farihi, J.; Wood, P. R.; Stalder, B. (2005). "SSSPM J1549-3544 is Not a White Dwarf". The Astrophysical Journal. 627 (1): L41–L43. arXiv:astro-ph/0505525. Bibcode:2005ApJ...627L..41F. doi:10.1086/432158. S2CID 10645235.
^ Scholz, R. -D; Lehmann, I.; Matute, I.; Zinnecker, H. (2004). "The nearest cool white dwarf (D ∼4 pc), the coolest M-type subdwarf (SdM9.5), and other high proper motion discoveries". Astronomy and Astrophysics. 425: 519–527. arXiv:astro-ph/0406457. Bibcode:2004A&A...425..519S. doi:10.1051/0004-6361:20041059. S2CID 9352481.

This subdwarf star-related article is a stub. You can help Wikipedia by expanding it.

Zdroj:https://en.wikipedia.org?pojem=SSSPM_J1549-3544
Text je dostupný za podmienok Creative Commons Attribution/Share-Alike License 3.0 Unported; prípadne za ďalších podmienok. Podrobnejšie informácie nájdete na stránke Podmienky použitia.

[dr3-1] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.

[p2-2] Farihi, J.; Wood, P. R.; Stalder, B. (2005). "SSSPM J1549-3544 is Not a White Dwarf". The Astrophysical Journal. 627 (1): L41–L43. arXiv:astro-ph/0505525. Bibcode:2005ApJ...627L..41F. doi:10.1086/432158. S2CID 10645235.

[p1-3] Scholz, R. -D; Lehmann, I.; Matute, I.; Zinnecker, H. (2004). "The nearest cool white dwarf (D ∼4 pc), the coolest M-type subdwarf (SdM9.5), and other high proper motion discoveries". Astronomy and Astrophysics. 425: 519–527. arXiv:astro-ph/0406457. Bibcode:2004A&A...425..519S. doi:10.1051/0004-6361:20041059. S2CID 9352481.

[1]

[2]

[3]

Observation data Epoch J2000 Equinox J2000
Constellation	Lupus
Right ascension	15^h 48^m 40.172^s^[1]
Declination	−35° 44′ 26.17″^[1]
Apparent magnitude (V)	14.78^[2]
Characteristics
Spectral type	sdK5^[2]
Astrometry

Proper motion (μ)	RA: −597.714^[1] mas/yr Dec.: −535.841^[1] mas/yr
Parallax (π)	10.4127 ± 0.0214 mas^[1]
Distance	313.2 ± 0.6 ly (96.0 ± 0.2 pc)
Absolute magnitude (M_V)	9.5

Details

Radius	0.30^[1] `R`_☉
Luminosity	0.02^[1] `L`_☉
Surface gravity (log g)	5.0^[1] cgs
Temperature	3,956^[1] K
Metallicity	−1.28^[1] dex

Other designations
SSSPM J1549-3544, 2MASS J15484023-3544254
Database references
SIMBAD	data