2001A&A...374..957S


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.07CET05:22:15

2001A&A...374..957S - Astronomy and Astrophysics, volume 374, 957-967 (2001/8-2)

Physical parameters of λ Bootis stars.

SOLANO E., PAUNZEN E., PINTADO O.I. and VARELA J.

Abstract (from CDS):

This is the first of two papers whose main goal is to update and improve the information available on the physical properties of the λ Bootis stars. The determination of the stellar parameters is of fundamental importance to shed light into the different theories proposed to explain the λ Bootis phenomenon. With this aim, projected rotational velocities, effective temperatures, surface gravities and chemical abundances of a sample of suspected λ Bootis stars have been calculated. Five objects showing composite spectra typical of binary systems were found in our analysis. The abundance distribution of the program stars does not resemble the chemical composition of the class prototype, λ Boo, which poses some concerns regarding the idea of a well-defined, chemically homogeneous group of stars. A possible relation between rotational velocities and the λ Bootis phenomenon has been found. This result would be in agreement with the accretion scenario proposed by Turcotte & Charbonneau (1993).

Abstract Copyright:

Journal keyword(s): stars: chemically peculiar - stars: abundances

Simbad objects: 25

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Number of rows : 25

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 * pi.01 Ori PM* 04 54 53.7287660 +10 09 02.995200   4.723 4.648     A0Va_lB 243 0
2 NGC 2264 OpC 06 40 58 +09 53.7           ~ 1616 0
3 * alf CMi SB* 07 39 18.11950 +05 13 29.9552 0.82 0.79 0.37 -0.05 -0.28 F5IV-V+DQZ 1778 0
4 HD 68758 PM* 08 12 45.9007760328 -29 54 38.714650839   6.576 6.519     A1V 26 0
5 V* HZ Vel dS* 08 49 52.3521085534 -39 08 29.770890153   6.602 6.368     A2/3II/III 66 0
6 HD 81290 Pe* 09 23 02.0653762536 -49 03 30.791826501   9.15 8.89     F4VkA3mA3_lB? 50 0
7 V* AK Ant dS* 09 34 56.5519422925 -28 52 39.330592954   9.10 8.79     F1VkA3mA3_lB? 55 0
8 HD 107233 PM* 12 19 55.6449203485 -48 18 59.468148848   7.60 7.36     hF0VakA1mA1_lB 39 0
9 HD 109738 * 12 37 38.0629096186 -67 51 53.375811626   8.50 8.30     hA9VkA1mA1_lB 34 0
10 HD 111005 * 12 46 14.8232750824 +02 27 51.466749998   8.30 7.97     A9V 39 0
11 V* MO Hya dS* 12 51 57.8969100913 -26 44 17.797063067   6.358 6.141     F0VkA1mA1_lB 117 0
12 * 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
13 * b Ser ** 15 51 15.5941805 -03 05 25.793806   5.23 5.10     A2IV-Vn 106 0
14 V* HR Lib dS* 15 56 33.3735361896 -14 49 45.972376397   6.345 6.117     A2Ib/II 109 0
15 V* IN Lup dS* 15 59 10.9040173976 -38 44 54.940579221   7.46 7.17     F2VkA3mA3_lB? 48 0
16 V* NP TrA dS* 16 33 05.1549259176 -60 54 12.846211369   8.09 7.90     A2IVn 24 0
17 HD 156954 * 17 21 00.3553365771 -13 05 07.623145971   7.97 7.67     F0.5VkA9mA9 41 1
18 V* V346 Pav dS* 18 25 31.6299481485 -63 01 17.532599707   6.313 6.122     A8VkA2mA2_lB 67 0
19 HD 174005 * 18 48 39.4932291192 -06 00 15.526364327   6.717 6.494     A7VkA2mA2_lB 30 0
20 HD 177120 * 19 04 14.19485 -22 53 47.4664   7.03 6.88     A1III-IV(e) 17 1
21 HD 184190 * 19 34 55.2809746724 -39 47 26.250033685   10.02 9.74     A7/9s(w) 17 0
22 * b03 Cyg dS* 20 14 32.0319919055 +36 48 22.684605093 5.10 5.11 4.99 4.79 4.72 A2V 243 0
23 HD 193281 * 20 20 27.8805474206 -29 11 49.975108388   6.76 6.64 7.50   A2IV-V 92 0
24 HD 204041 PM* 21 25 51.5846178730 +00 32 03.619939380   6.593 6.450     A1Vb 97 0
25 HD 210111 dS* 22 08 42.6438955365 -33 07 32.498239929   6.564 6.386     A9VkA2mA2_lB 74 0

    Equat.    Gal    SGal    Ecl

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2021.03.07-05:22:15

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