1995A&A...299..493A

Query : 1995A&A...299..493A

1995A&A...299..493A - Astronomy and Astrophysics, volume 299493-502 (1995/7-2)

The behavior of the λ Bootis stars in the infrared.

ANDRILLAT Y., JASCHEK C. and JASCHEK M.

Abstract (from CDS):

We observed a sample of 20 λ Bootis (LB) stars in three wavelength regions in the near infrared between 7600 and 10800A. We find that the Paschen lines correspond systematically to a spectral type which is later than the one attributed in the blue. By comparison with a convenient set of MK standard stars we find that the O, Ca, C, S and Si lines are weak in LB stars in varying degrees. An analysis of the 16 LB stars which we confirmed in the infrared shows that seven exhibit evidences of classical A-type shells in the spectroscopic sense. Of these seven, five are certain and two are dubious, giving thus a percentage of at least 30% of shells in LB stars.

Abstract Copyright: ∼

Journal keyword(s): stars: chemically peculiar - stars: circumstellar matter - stars: early type

CDS comments: table 1 : HD 21395 misprint for 21335, HR 8800 misprint for 8880.

Simbad objects: 22

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Number of rows : 22
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 16955 * 02 43 51.2435867712 +25 38 18.050045172   6.46 6.39 7.45   A3V 42 0
2 HD 21335 ** 03 27 03.2348403240 +18 45 23.558435856   6.72 6.57     A3V 72 0
3 * pi.01 Ori PM* 04 54 53.7280989194 +10 09 03.003446941   4.723 4.648     A0Va_lB 268 0
4 HD 36496 ** 05 37 16.0241407 +66 41 48.090148 6.550 6.500 6.290     A8Vn 57 0
5 * 131 Tau ** 05 47 13.1536316 +14 29 17.967416   5.785 5.721     A3Vn 108 0
6 HD 39421 * 05 52 07.7290666608 -09 02 30.844893552   6.045 5.960     A0V 63 0
7 * ksi Aur * 05 54 50.7669372792 +55 42 25.080150456   5.005 4.960     A2V 126 0
8 HD 84948 SB* 09 50 05.8773671472 +49 04 31.750535568   8.42 8.12     F0 59 0
9 HD 97773 ** 11 15 28.69772 +47 28 46.1881   7.79 7.55     A5 39 0
10 * 55 UMa SB* 11 19 07.8861142632 +38 11 08.135935332   4.90 4.80     A2V 142 0
11 HD 101108 * 11 38 19.3666459704 +38 45 16.889006304   9.05 8.87     A5_lB 45 0
12 HD 105058 dS* 12 05 43.3556676096 +49 40 55.994662056   9.05 8.88     A2IV 67 0
13 HD 106223 Em* 12 13 16.8983653416 +30 16 58.946364228 7.64 7.72 7.44     hF3VkA3mA3_lB 94 0
14 * rho Vir dS* 12 41 53.0569475088 +10 14 08.252569320 5.00 4.97 4.88 4.80 4.78 A0Va_lB 232 0
15 * lam Boo dS* 14 16 23.0184083839 +46 05 17.895459693 4.31 4.26 4.18 4.16 4.13 A0Va_lB 362 0
16 * 109 Vir PM* 14 46 14.9234473441 +01 53 34.381780831 3.69 3.72 3.73 3.66 3.68 A0IIInn 346 0
17 * c Aql dS* 19 29 00.9869402808 +01 57 01.616825124   5.865 5.783     A0IVp 188 0
18 * tet Peg PM* 22 10 11.9886121211 +06 11 52.517717538 3.72 3.62 3.55 3.50 3.46 A1Va 194 0
19 * 2 And ** 23 02 36.38176 +42 45 28.0628           A1V 169 0
20 * tau Peg dS* 23 20 38.2462291728 +23 44 25.278232056   4.745 4.580     A5Vp_lB 189 0
21 * 15 And dS* 23 34 37.5368337288 +40 14 11.182658856   5.652 5.563 6.91   A1Va 141 0
22 HD 222303 * 23 38 53.5106827176 +66 29 33.307111860   9.73 9.16     A 14 0

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