2004ApJ...616..519S


Query : 2004ApJ...616..519S

2004ApJ...616..519S - Astrophys. J., 616, 519-524 (2004/November-3)

The companion to the central mira star of the protoplanetary nebula OH 231.8+4.2.

SANCHEZ CONTRERAS C., GIL DE PAZ A. and SAHAI R.

Abstract (from CDS):

We present deep optical long-slit spectra of the peculiar protoplanetary nebula (PPN) OH 231.8+4.2 obtained with the 6.5 m Baade Telescope at Las Campanas Observatory (Chile). In addition to the molecular absorption bands characteristic of the M9-10 III star inside OH 231.8+4.2 (QX Pup), we identify lines of the Balmer series in absorption, which do not form in the cool atmospheres of late M-type stars. We also confirm the presence of a blue continuum excess with an intensity that is a factor ∼30 larger than that expected for an M9-10 III star. Our results indicate the presence of a source hotter than QX Pup illuminating OH 231.8+4.2 that is likely a main-sequence star with spectral type A. We discuss how the formation and nebular evolution of OH 231.8+4.2 could have been affected by the presence of a binary system in its core.

Abstract Copyright:

Journal keyword(s): Stars: Binaries: General - Stars: Circumstellar Matter - Stars: AGB and Post-AGB - Stars: Individual: Alphanumeric: OH 231.8+4.2 - Stars: Mass Loss - Stars: Variables: Other

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 L 595-22 PM* 05 56 24.7419816722 -27 51 32.362978169   12.31 12.38     sdG 148 0
2 OH 231.8 +4.2 OH* 07 42 16.947 -14 42 50.20           M10III+A 513 1
3 LAWD 37 WD* 11 45 42.9170659451 -64 50 29.464090822 11.08 11.725 11.513 11.34 11.163 DQ 242 0
4 WG 22 WD* 12 38 49.7813250074 -49 48 00.218655097   14.14 13.96     DA4.2 211 0

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2021.10.27-21:13:15

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