2001A&A...370..524M


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.08CET01:29:46

2001A&A...370..524M - Astronomy and Astrophysics, volume 370, 524-528 (2001/5-1)

A speckle interferometry survey of λ Bootis stars.

MARCHETTI E., FARAGGIANA R. and BONIFACIO P.

Abstract (from CDS):

A search for duplicity of λ Boo stars has been made by using the speckle camera installed at the Telescopio Nazionale Galileo. The operation mode and the reduction procedure allow one to obtain not only the separation, but also the magnitude difference between the components; the latter parameter is fundamental for determining the degree of contamination from the secondary component of a binary system and thus the importance of the veiling effect that produces absorption lines weaker than normal. Two stars, HD 38545 and HD 290492, are close binaries with values of the separation and of the magnitude difference such that only a composite spectrum can be observed. For another 15 λ Boo candidates, observed with negative results, the upper limits of a possible companion separation are given.

Abstract Copyright:

Journal keyword(s): techniques: interferometers - stars: chemically peculiar - binaries: general

Simbad objects: 17

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Number of rows : 17

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 HD 3 * 00 05 09.7579226124 +45 13 44.508863141 6.840 6.770 6.710     A0Vn_lB 46 0
2 * gam02 Ari PM* 01 53 31.8118643437 +19 17 37.882581778   4.49 4.52     A2IVpSiSrCr 153 0
3 HD 23392 * 03 44 32.7249108367 -08 35 12.463543073   8.29 8.24     A0Va-_lB 26 0
4 CCDM J05313-0029AB ** 05 31 18.752 -00 29 24.24   9.47 9.39     A0 22 0
5 * 131 Tau ** 05 47 13.1536316 +14 29 17.967416   5.785 5.721     A3Vn 98 0
6 HD 39421 * 05 52 07.7291332434 -09 02 30.840453230   6.045 5.960     A0V 55 0
7 V* DD Lyn dS* 07 55 40.8263456114 +35 24 45.669980557   6.478 6.221     A3p 66 0
8 * 50 Cnc PM* 08 46 56.0191877567 +12 06 35.830526746   5.992 5.885 7.20 5.76 A1Vp 84 0
9 HD 84123 PM* 09 44 06.8765461366 +42 03 03.131298842   7.135 6.838     A4III 51 0
10 HD 84948 SB* 09 50 05.8774942991 +49 04 31.750979246   8.42 8.12     F0 50 0
11 HD 90821 * 10 29 37.0987720698 +26 10 58.571898631   9.54 9.45     F0 19 0
12 * 33 LMi * 10 31 51.3746360193 +32 22 46.412107377   6.001 5.905     A0Va- 65 0
13 HD 98772 * 11 22 51.2437905712 +64 19 49.843190242 6.180 6.110 6.030     A3V 54 0
14 HD 105058 dS* 12 05 43.3557996963 +49 40 55.995517673   9.05 8.88     A2p 59 0
15 * eps Her SB* 17 00 17.3737789 +30 55 35.056489 3.80 3.91 3.92 3.93 3.97 A0V 163 0
16 * b03 Cyg dS* 20 14 32.0319919055 +36 48 22.684605093 5.10 5.11 4.99 4.79 4.72 A2V 243 0
17 HD 204041 PM* 21 25 51.5846178730 +00 32 03.619939380   6.593 6.450     A1Vb 97 0

    Equat.    Gal    SGal    Ecl

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2021.03.08-01:29:46

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