Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...275..256w&link_type=abstract
Astronomy and Astrophysics, Vol.275, NO. 1/AUG(I), P. 256, 1993
Astronomy and Astrophysics
Astrophysics
10
Planetary Nebulae: Individual (Abell 63), Stars: Binaries: Close, Stars: Individual (Uu Sge)
Scientific paper
UU Sge, the eclipsing binary central star of the low- surface-brightness planetary nebula (PN) Abell 63, has been observed spectroscopically in the visible throughout its 11.2 hour period and especially during the minimum. A determination of the spectral types of the components of the binary system has been made. The primary hot central star is an `sdO' type PN nucleus of temperature ˜50 000 K, consistent with the low excitation of the nebular spectrum. From the spectrum at minimum light, the secondary star can be identified as a cool dwarf star around late G, if on the main sequence. Measurement of the magnitude of the secondary during the eclipse of the primary enabled an upper limit to the distance to the PN to be directly determined as ˜3.6 kpc. For this distance the luminosity of the hot star is ˜2400 Lsun, in agreement with evolutionary tracks for (single) PN nuclei. Deep CCD images of Abell 63 reveal it to have a `butterfly' morphology implying that the close binary central system may have had a strong effect on the nebula shaping.
Pottasch Stuart R.
Walsh Jonathan R.
Walton Nic A.
No associations
LandOfFree
Imaging and Spectroscopy of ABELL:63 Uu-Sagittae does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Imaging and Spectroscopy of ABELL:63 Uu-Sagittae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Imaging and Spectroscopy of ABELL:63 Uu-Sagittae will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1490037