2012MNRAS.422.2072F


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.06CET01:11:49

2012MNRAS.422.2072F - Mon. Not. R. Astron. Soc., 422, 2072-2101 (2012/May-3)

Chemical abundances of magnetic and non-magnetic Herbig Ae/Be stars.

FOLSOM C.P., BAGNULO S., WADE G.A., ALECIAN E., LANDSTREET J.D., MARSDEN S.C. and WAITE I.A.

Abstract (from CDS):

The photospheres of about 10-20 per cent of main-sequence A- and B-type stars exhibit a wide range of chemical peculiarities, often associated with the presence of a magnetic field. It is not exactly known at which stage of stellar evolution these chemical peculiarities develop. To investigate this issue, in this paper we study the photospheric compositions of a sample of Herbig Ae and Be stars, which are considered to be the pre-main-sequence progenitors of A and B stars. We have performed a detailed abundance analysis of 20 Herbig stars (three of which have confirmed magnetic fields), and one dusty young star. We have found that half the stars in our sample show λ Boötis (λ Boo) chemical peculiarities to varying degrees, only one star shows weak Ap/Bp peculiarities and all the remaining stars are chemically normal. The incidence of λ Boo chemical peculiarities we find in Herbig stars is much higher than what is seen on the main sequence. We argue that a selective accretion model for λ Boo star formation is a natural explanation for the remarkably large number of λ Boo stars in our sample. We also find that the magnetic Herbig stars do not exhibit a range of chemical compositions remarkably different from the normal stars: one magnetic star displays λ Boo chemical peculiarities (HD 101412), one displays weak Ap/Bp peculiarities (V380 Ori A) and one (HD 190073) is chemically normal. This is completely different from what is seen on the main sequence, where all magnetic A and cool B stars show Ap/Bp chemical peculiarities, and this is consistent with the idea that the magnetic field precedes the formation of the chemical peculiarities typical of Ap and Bp stars.

Abstract Copyright: 2012 The Authors Monthly Notices of the Royal Astronomical Society2012 RAS

Journal keyword(s): stars: abundances - stars: chemically peculiar - stars: magnetic field - stars: pre-main-sequence

Simbad objects: 35

goto Full paper

goto View the reference in ADS

Number of rows : 35

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 V* VX Cas Ae* 00 31 30.6816836826 +61 58 50.982831889 11.83 11.59 10.50 11.19 10.94 A0Vep 128 0
2 * pi. Cet SB* 02 44 07.3492803 -13 51 31.313011 3.66 4.112 4.236     B7IV 317 0
3 HD 278937 Em* 03 40 46.9603307360 +32 31 53.715906654   10.66 10.40     A7III:kA2.5mA3e(r) 76 0
4 V* AB Aur Ae* 04 55 45.8459978418 +30 33 04.293281305 7.20 7.16 7.05 6.96 6.70 A0Ve 951 2
5 HD 31648 Ae* 04 58 46.2654165113 +29 50 36.990341242 7.84 7.78 7.62 7.76 7.43 A5Vep 412 0
6 V* V1366 Ori Ae* 05 16 00.4764811920 -09 48 35.394685295 10.19 10.16 9.84 9.77 9.63 B9.5V 168 0
7 HD 36112 Ae* 05 30 27.5286772598 +25 19 57.082162439   8.57 8.27     A8Ve 382 0
8 HD 244604 Or* 05 31 57.2512002483 +11 17 41.374206174   9.61 9.43     A0Vesh 61 0
9 HD 245185 Ae* 05 35 09.6040600795 +10 01 51.465846371 10.05 10.07 9.93     A0Vae 109 0
10 V* T Ori Ae* 05 35 50.4483740019 -05 28 34.923375739 12.724 11.637 11.248 10.09 10.043 A3IVeb 232 0
11 BD-06 1253 Ae* 05 36 25.4313245626 -06 42 57.684449700   11.65 10.9 10.29   A1e 408 1
12 HD 37806 Be* 05 41 02.2930276072 -02 43 00.729083804 7.67 7.93 7.90     B9/9.5II/III 143 0
13 NGC 2244 OpC 06 31 55 +04 56.5           ~ 571 1
14 LS VI +04 12 * 06 32 06.1359057425 +04 52 15.354300165 9.21 9.84 9.71     B1III 53 0
15 2MASS J06325179+0447161 Y*O 06 32 51.7917882037 +04 47 16.158756729 13.17 13.38 12.95 12.46 12.34 ~ 34 0
16 HD 68695 Y*O 08 11 44.5714790186 -44 05 08.775980169   9.93 9.87     A3VbekA0mA0_lB 33 0
17 HD 72106 ** 08 29 34.89852 -38 36 21.1321       9.32   A0IV 64 0
18 HD 76534 Be* 08 55 08.70673 -43 27 59.8852 7.04 7.62 7.50 8.94   B2Vn 114 0
19 HD 98922 Be* 11 22 31.6740564115 -53 22 11.456030308   6.80 6.76     B9Ve 117 1
20 HD 100546 Be* 11 33 25.4404858122 -70 11 41.239343121   6.71 6.30   6.64 A0VaekB8_lB 669 1
21 HD 101412 Be* 11 39 44.4562795603 -60 10 27.717502041   9.465 9.288     A3VaekA0mA0_lB 121 0
22 * lam Boo dS* 14 16 23.0187965 +46 05 17.900526 4.31 4.26 4.18 4.16 4.13 A0Va_lB 330 0
23 HD 139614 Ae? 15 40 46.3818973118 -42 29 53.538928508   8.47 8.24     A9VekA5mA5(_lB) 167 0
24 HD 141569 Y*O 15 49 57.7484743862 -03 55 16.344023102 7.22 7.20 7.12 7.00 7.04 A2VekB9mB9(_lB) 480 0
25 HD 142666 TT* 15 56 40.0222941557 -22 01 40.004849949 9.41 9.37 8.82 8.31 8.01 F0V_sh 225 0
26 HD 144432 Ae* 16 06 57.9530266912 -27 43 09.758016578 8.47 8.53 8.19 7.82 7.53 A9/F0V 218 1
27 V* V856 Sco Ae* 16 08 34.2868591379 -39 06 18.326059778 7.66 7.41 7.05 6.92   A7IIIne_sh 359 0
28 HD 163296 Ae* 17 56 21.2882188601 -21 57 21.872343282 7.00 6.93 6.85 6.86 6.67 A1Vep 843 0
29 M 16 OpC 18 18 48 -13 48.4   6.58 6.0     ~ 957 2
30 BD-13 4937 Y*O 18 19 20.0316463029 -13 54 21.680395015 10.53 11.11 10.78     B1.5V 34 1
31 HD 169142 Ae* 18 24 29.7799676975 -29 46 49.328597698   8.42 8.16     F1VekA3mA3_lB? 352 2
32 HD 176386 Y*O 19 01 38.9314887024 -36 53 26.560961605 7.28 7.44 7.32 8.11   B9V 120 0
33 HD 179218 Ae* 19 11 11.2540715594 +15 47 15.632212730 7.55 7.476 7.39 7.25 7.21 A0Ve 225 0
34 HD 190073 Ae* 20 03 02.5098091524 +05 44 16.658081203 7.91 7.86 7.73   7.65 A2IVe 232 0
35 HD 200775 Ae* 21 01 36.9184805541 +68 09 47.770037306 7.34 7.754 7.427 8.13   B2Ve 518 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2012MNRAS.422.2072F and select 'bookmark this link' or equivalent in the popup menu


2021.03.06-01:11:49

© Université de Strasbourg/CNRS

    • Contact