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| Query : 2000MNRAS.312..295B |
2000MNRAS.312..295B - Mon. Not. R. Astron. Soc., 312, 295-300 (2000/February-3)
Possible detection of an old bipolar shell associated with η Carinae.
BOHIGAS J., TAPIA M., RUIZ M.T. and ROTH M.
Abstract (from CDS):
Continuum-subtracted dereddened images in the light of several atomic lines show the presence of an extended bipolar nebula surrounding η Carinae with size ∼100x45arcsec2 (1.3x0.5pc2). This feature is best delineated in [Oiii] 5007. The geometrical disposition and mass of the shell suggest that it was formed by mass ejections from η Carinae. The dynamic age of the nebula is ∼13000/V7yr, where V7 is the mean expansion velocity in 100km.s–1, and its mass is between 5 and 10M☉. The nebula is photoionized and composed of unprocessed material. The major axes of the nebula and of the Homunculus are nearly perpendicular. We also report the discovery of elongated emission knots prominent in [Nii] located 64 to 100arcsec away from η Carinae, which implies that they were ejected either centuries ago or at a more recent date but with extremely large velocities.
Abstract Copyright: Blackwell Science Ltd
Journal keyword(s): stars: individual: η Carinae - stars: variables: other - Hii regions - ISM: individual: NGC 3372
Simbad objects: 8
| Number of rows : 8 |
| N | Identifier | Otype |
ICRS (J2000) RA |
ICRS (J2000) DEC |
Mag U | Mag B | Mag V | Mag R | Mag I | Sp type |
#ref
1850 - 2026 |
#notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | HD 90177 | s*b | 10 22 53.8430096928 | -59 37 28.363616256 | 9.16 | 9.66 | 8 | 8.15 | LBV | 342 | 0 | |
| 2 | Cl Trumpler 14 | OpC | 10 43 56.0 | -59 33 07 | 5.70 | 5.5 | ~ | 547 | 0 | |||
| 3 | Cl Trumpler 16 | OpC | 10 45 01.9 | -59 42 00 | ~ | 510 | 0 | |||||
| 4 | NGC 3372 | HII | 10 45 02.23 | -59 41 59.8 | ~ | 1071 | 2 | |||||
| 5 | * eta Car | s*b | 10 45 03.545808 | -59 41 03.95124 | 6.37 | 7.03 | 6.48 | 6.123 | 4.41 | LBV | 2543 | 0 |
| 6 | HD 303308 | ** | 10 45 05.9147911152 | -59 40 05.925360036 | 7.45 | 8.30 | 8.17 | 7.92 | 7.75 | O4.5V((fc)) | 314 | 0 |
| 7 | V* AG Car | WR* | 10 56 11.5781414448 | -60 27 12.810673260 | 7.00 | 7.57 | 6.96 | 7.73 | WN11h | 649 | 0 | |
| 8 | * P Cyg | s*b | 20 17 47.2019733389 | +38 01 58.549132671 | 4.66 | 5.24 | 4.82 | 4.28 | 4.02 | B1-2Ia-0ep | 1200 | 1 |
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