2004AJ....128.2474M

Query : 2004AJ....128.2474M

2004AJ....128.2474M - Astron. J., 128, 2474-2500 (2004/November-0)

The origins and evolutionary status of B stars found far from the galactic plane. I. Composition and spectral features.

MARTIN J.C.

Abstract (from CDS):

The existence of faint blue stars far above the Galactic plane that have spectra that are similar to nearby Population I B stars presents several interesting questions. Among them are the following: Can a Population I B star travel from the disk to a position many kiloparsecs above the plane in a relatively short main-sequence lifetime? Is it possible that single massive star formation is occurring far from the Galactic plane? Are these objects something else masquerading as main-sequence B stars? This paper (the first of two) analyzes the abundances of a sample of these stars and reveals several that are chemically similar to nearby Population I B stars, whereas others clearly have abundance patterns more like those expected in blue horizontal-branch (BHB) or post-asymptotic giant branch stars. Several of those with old evolved star abundances also have interesting features of note in their spectra. We also consider why this sample does not have any classical Be stars and identify at least two nearby solar-metallicity BHB stars.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Structure - Stars: Abundances - Stars: AGB and Post-AGB - Stars: Early-Type - Stars: Emission-Line, Be - Stars: Horizontal-Branch

Simbad objects: 72

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Number of rows : 72
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 * gam Peg bC* 00 13 14.1523490172 +15 11 00.954346538 1.75 2.61 2.84 2.94 3.13 B2IV 693 0
2 HD 1084 PM* 00 15 09.8688398064 +17 41 30.056015688   9.45 8.99     F8 11 0
3 HD 1112 * 00 15 27.2847614880 -03 39 15.097931676   9.05 9.11     B9V 28 0
4 HIP 1511 * 00 18 49.7908688760 +30 23 33.449073648   11.72 11.39     ~ 15 0
5 BD-15 115 * 00 38 20.2595898264 -14 59 54.165165180 9.848 10.686 10.885 10.980 11.089 B2 62 0
6 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3332 2
7 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11141 1
8 HD 8323 * 01 22 24.8825924616 -07 17 12.975052092   9.45 9.61     B8IV 32 0
9 BD-07 230 * 01 26 38.4450766152 -06 20 18.671848080   11.2 11.0     ~ 21 0
10 Feige 23 * 02 32 17.1742214952 +02 59 52.633663188   11.74 11.56     B6V 29 0
11 HD 15910 * 02 32 54.4837188408 -20 20 12.010328088   10.06 10.16     B9IV/V 21 0
12 Feige 25 * 02 38 37.7859286344 +05 28 11.304856488   12.50 13.55     B7 55 0
13 HD 18100 bC? 02 53 40.8050199600 -26 09 20.428125408   8.23 8.44     B5II/III 100 0
14 HD 21305 * 03 25 35.9322956424 -20 20 03.547222656   10.14 10.33     B3/5III 24 0
15 HD 21532 * 03 27 46.3619744808 -21 23 50.689903524   9.75 9.84     B7V 29 0
16 * eps Per bC* 03 57 51.2320472 +40 00 36.775143 1.71 2.71 2.89 2.96 3.14 B0.5III 519 0
17 HD 28114 bC* 04 26 21.1022491080 +08 35 24.952062192 5.65 6.046 6.055     B6IV 77 1
18 * bet Ori s*b 05 14 32.27210 -08 12 05.8981 -0.56 0.10 0.13 0.13 0.15 B8Iae 763 0
19 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17421 0
20 * gam Ori V* 05 25 07.86325 +06 20 58.9318 0.54 1.42 1.64 1.73 1.95 B2V 523 1
21 * 134 Tau * 05 49 32.9303335271 +12 39 04.760685507 4.68 4.811 4.875     B9IV 197 0
22 HD 40276 * 05 53 24.3001465128 -62 48 18.804157956   10.10 9.98 9.92 9.962 A3IV 15 0
23 HD 40267 * 05 56 47.0276462712 -22 17 54.991972968   9.62 9.81     B3II/III 14 0
24 HD 44179 pA* 06 19 58.2185496 -10 38 14.706068 9.51 9.33 9.02     B9Ib/II 764 0
25 HD 60778 HB* 07 36 11.7736405176 -00 08 15.571268556 9.34 9.20 9.10     A0III/IV 111 0
26 V* PT Pup bC* 07 36 41.0352383592 -19 42 08.425020168 4.65 5.524 5.699     B2III 147 0
27 BD+61 996 * 07 46 02.5443894624 +61 21 47.060562780   9.80 9.91     B2 14 0
28 Ton 927 HS* 08 33 20.3353408224 +20 24 24.725941524   11.237 11.353 11.640   sdB/sdO 26 0
29 HD 74721 HB* 08 45 59.2614567408 +13 15 48.591616392 8.88 8.75 8.72     A0V 152 0
30 HD 233622 V* 09 21 33.6007333536 +50 05 56.365066896   9.76 9.91     B2V 51 0
31 HD 237844 * 09 51 57.9753671424 +55 43 32.399570532   9.94 10.12     B2III 21 0
32 V* ER Leo dS* 10 21 47.0681038800 +15 32 03.587322840   9.80 9.87     ~ 26 0
33 * 39 UMa PM* 10 43 43.3264670520 +57 11 57.118841016   5.744 5.782     A0III 64 0
34 BD+38 2182 * 10 49 12.9127247352 +38 00 14.849836668   10.95 11.2     B3V 55 0
35 Feige 40 * 11 21 29.3461640136 +11 19 17.027257728   11.1 11.1     B4V 37 0
36 HD 100340 HS? 11 32 49.9414410936 +05 16 36.231905676 8.906 9.881 10.115 10.219 10.353 B0 100 0
37 HD 103376 * 11 54 17.1795190488 +18 37 22.746335052   10.03 10.17     B8Vk 38 0
38 HD 105183 HS* 12 06 47.2348389600 +11 40 12.659833056   10.93 11.06     sdB8IIIHe2 120 0
39 HD 105262 pA* 12 07 10.8254657184 +12 59 07.679272308 6.96 7.08 7.08     B9 70 0
40 HD 106929 * 12 17 49.9634494392 +10 07 11.965090152   9.64 9.79     B9 33 0
41 BD+49 2137 * 12 25 00.3907055280 +49 08 30.658247052   10.49 10.63     B7V 33 0
42 BD+36 2268 V* 12 25 23.4491331360 +35 58 33.472196148   10.20 10.31     B3Vn 53 0
43 HD 110166 * 12 39 56.9868304272 +36 59 53.607675624   8.64 8.74     B7V 44 0
44 BD+30 2355 * 13 01 52.9622439552 +29 34 57.158060088   10.55 10.65     A0V 41 0
45 PB 166 HS* 13 24 00.7250833176 +49 22 32.314906740   12.29 12.48     sdB 37 0
46 Feige 84 HS* 13 35 11.9823807408 +13 27 44.096137488   11.5 11.4     sdB3 43 0
47 HD 119608 * 13 44 31.3089560400 -17 56 13.217749476 6.65 7.47 7.53 7.51 7.51 B1Ib 121 0
48 HD 121968 * 13 58 51.1663111056 -02 54 52.325640252 9.160 10.071 10.256 10.330 10.429 B2II 108 0
49 HD 123884 s*b 14 10 33.7821642384 -17 59 27.301869456 9.02 9.35 9.32     B8/9Ia/abp 50 0
50 HD 125924 * 14 22 42.9946000008 -08 14 53.580901704 8.64 9.48 9.66     B2IV 91 0
51 BD+20 3004 V* 14 39 31.2483522456 +19 25 43.517114184   9.98 10.04     B5V 32 0
52 HD 137569 pA* 15 26 20.8172517192 +14 41 36.321520992   7.86 7.91     B9Iab:p 103 0
53 V* IT Lib EB* 15 33 18.9137957616 -25 01 37.011331272 8.34 9.04 9.09     B2/3(IV)(n) 36 0
54 HD 140543 bC* 15 44 56.6613740256 -21 48 53.910922644 7.97 8.86 8.88     B1Iab/b(n) 55 0
55 BD+33 2642 pA* 15 51 59.8854348048 +32 56 54.329485272 9.806 10.61 10.73 10.884 10.961 O7p 429 0
56 HD 146813 Pu* 16 15 14.8024445208 +55 47 58.353874620   8.86 9.06     B1.5 50 0
57 HD 149363 * 16 34 28.2788187456 -06 08 10.281661044 7.06 7.86 7.81     B1/2Ib 90 0
58 * tau Sco * 16 35 52.9528530 -28 12 57.661515 1.55 2.56 2.81 2.93 3.18 B0.2V 920 0
59 V* V652 Her pA* 16 48 04.6934854032 +13 15 42.420402252   10.31 10.51     ~ 137 0
60 HD 183899 * 19 32 45.1795643616 -26 09 46.633467528 8.93 9.75 9.93     B1/2II 35 0
61 HD 188618 * 19 56 40.4812487520 -17 55 17.060259252   9.48 9.38     B2II 30 0
62 * nu. Cap * 20 20 39.8157949497 -12 45 32.690284207 4.61 4.72 4.76 4.75 4.81 B9IV 271 0
63 HIP 104931 * 21 15 18.4730663808 +03 25 09.489842004   10.90 10.45     B5 10 0
64 HD 206144 Pu* 21 40 33.3796014624 -17 36 00.560827224 8.36 9.22 9.34     B2II(n) 64 0
65 * 21 Peg * 22 03 19.0326115488 +11 23 11.574375540   5.762 5.822     B9.5V 149 0
66 HD 209684 * 22 05 31.1550386448 -13 46 12.835716744 8.83 9.657 9.803     B2/3III 39 0
67 HD 213781 HB* 22 34 04.5839974008 -12 09 29.608937280 8.48 8.93 9.00 9.71 9.22 B8/9III 42 0
68 HD 216135 HS* 22 50 28.2300262944 -13 18 44.343755820 9.374 9.992 10.111 10.163 10.230 sdB5 46 0
69 HD 217811 V* 23 02 45.1478611209 +44 03 31.498436363 5.8 6.38 6.42     B2V 82 1
70 HD 218970 PM* 23 12 30.6294754224 -21 06 43.453464732   9.57 9.81     A0p 42 0
71 HD 220787 * 23 26 45.4929041352 -11 01 57.358135488 7.44 8.14 8.29     B3III 76 0
72 HD 222040 * 23 37 17.6935733424 -20 55 55.148361852   11.1 11.5     B9IV 14 0

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