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| Query : 1999ApJ...520L..55W |
1999ApJ...520L..55W - Astrophys. J., 520, L55-L58 (1999/July-3)
Three very young HgMn stars in the Orion OB1 association.
WOOLF V.M. and LAMBERT D.L.
Abstract (from CDS):
We report the detection of three mercury-manganese stars in the Orion OB1 association. HD 37886 and BD -0°984 are in the approximately 1.7 million year old Orion OB1b. HD 37492 is in the approximately 4.6 million year old Orion OB1c. Orion OB1b is now the youngest cluster with known HgMn star members. This places an observational upper limit on the timescale needed to produce the chemical peculiarities seen in mercury-manganese stars, which should help in the search for the cause or causes of the peculiar abundances in HgMn and other chemically peculiar upper main-sequence stars.
Abstract Copyright: ∼
Journal keyword(s): Galaxy: Open Clusters and Associations: Individual Constellation Name: Orion OB1 - Stars: Abundances - Stars: Chemically Peculiar - Stars: Individual: Alphanumeric: BD -0 984 - Stars: Individual: Henry Draper Number: HD 37492 - Stars: Individual: Henry Draper Number: HD 37886
Simbad objects: 23
| Number of rows : 23 |
| 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 | * alf And | a2* | 00 08 23.25988 | +29 05 25.5520 | 1.48 | 1.95 | 2.06 | 2.09 | 2.19 | B8IV-VHgMn | 479 | 1 |
| 2 | * 11 Per | * | 02 43 02.8380253536 | +55 06 21.666195864 | 5.13 | 5.639 | 5.753 | B8IV | 82 | 0 | ||
| 3 | * 53 Tau | a2* | 04 19 26.0975894496 | +21 08 32.298968148 | 5.413 | 5.482 | B9Vsp | 283 | 0 | |||
| 4 | HD 33647 | a2* | 05 11 41.3498014 | +00 30 52.459194 | 6.601 | 6.667 | B8II/III | 99 | 0 | |||
| 5 | HD 35548 | ** | 05 25 31.0794483731 | -00 32 38.128886484 | 6.34 | 6.52 | 6.56 | B9III | 159 | 0 | ||
| 6 | BD-00 984 | Pe* | 05 32 04.0010727600 | -00 25 44.810292900 | 8.310 | 8.378 | 9.36 | 8.82 | B8III | 30 | 0 | |
| 7 | Ass Ori OB 1b | As* | 05 34.0 | -01 30 | ~ | 281 | 0 | |||||
| 8 | NAME Ori Trapezium | OpC | 05 35 16.5 | -05 23 14 | ~ | 1708 | 1 | |||||
| 9 | Ass Ori OB 1c | As* | 05 35 21 | -05 20.5 | ~ | 142 | 1 | |||||
| 10 | NAME Ori I | As* | 05 38 | -02.8 | ~ | 653 | 0 | |||||
| 11 | HD 37492 | SB* | 05 38 39.7196275848 | -08 28 15.648981960 | 7.02 | 7.09 | 8.11 | 9.29 | B8III | 40 | 0 | |
| 12 | HD 37886 | * | 05 41 32.0065124640 | -02 58 26.602064364 | 8.956 | 8.979 | 9.67 | 9.51 | B8III | 37 | 0 | |
| 13 | HD 47553 | * | 06 39 35.0142186456 | +10 14 26.195192520 | 8.50 | 8.54 | B9III | 18 | 0 | |||
| 14 | NGC 2264 | OpC | 06 40 53.7 | +09 52 32 | ~ | 1876 | 0 | |||||
| 15 | HD 53929 | * | 07 07 06.4712319600 | +04 54 38.091397320 | 5.52 | 5.961 | 6.088 | B9III | 105 | 0 | ||
| 16 | V* ET UMa | a2* | 10 24 07.8468791760 | +65 33 59.121373140 | 4.889 | 4.930 | A1:VpSiSrHg | 284 | 0 | |||
| 17 | * chi Lup | SB* | 15 50 57.5453432166 | -33 37 37.728345509 | 3.77 | 3.909 | 3.946 | B9III | 318 | 0 | ||
| 18 | * iot CrB | SB* | 16 01 26.5649192496 | +29 51 03.819408336 | 4.921 | 4.971 | A0IIIspHgMnEu | 275 | 0 | |||
| 19 | HD 144661 | * | 16 07 51.8878572504 | -24 27 44.447463108 | 5.74 | 6.27 | 6.33 | B8IV/V | 167 | 0 | ||
| 20 | NAME Upper Sco-Cen | As* | 16 15 | -24.2 | ~ | 1497 | 1 | |||||
| 21 | HD 178065 | SB* | 19 07 09.0293341368 | +00 38 27.491355672 | 6.31 | 6.584 | 6.538 | B9III | 103 | 0 | ||
| 22 | * 30 Cap | * | 21 17 57.2864746704 | -17 59 06.499058280 | 5.263 | 5.383 | B5II/III | 96 | 0 | |||
| 23 | Ass Ori OB 1a | As* | ~ | ~ | ~ | 237 | 0 |
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