2016A&A...592A.130L


C.D.S. - SIMBAD4 rel 1.7 - 2020.06.05CEST11:50:49

2016A&A...592A.130L - Astronomy and Astrophysics, volume 592A, 130-130 (2016/8-1)

Evolutionary status of isolated B[e] stars.

LEE C.-D., CHEN W.-P. and LIU S.-Y.

Abstract (from CDS):

Aims. We study a sample of eight B[e] stars with uncertain evolutionary status to shed light on the origin of their circumstellar dust.
Methods. We performed a diagnostic analysis on the spectral energy distribution beyond infrared wavelengths, and conducted a census of neighboring region of each target to ascertain its evolutionary status.
Results. In comparison to pre-main sequence Herbig stars, these B[e] stars show equally substantial excess emission in the near-infrared, indicative of existence of warm dust, but much reduced excess at longer wavelengths, so the dusty envelopes should be compact in size. Isolation from star-forming regions excludes the possibility of their pre-main sequence status. Six of our targets, including HD 50138, HD 45677, CD-24 5721, CD-49 3441, MWC 623, and HD 85567, have been previously considered as FS CMa stars, whereas HD 181615/6 and HD 98922 are added to the sample by this work. We argue that the circumstellar grains of these isolated B[e] stars, already evolved beyond the pre-main sequence phase, should be formed in situ. This is in contrast to Herbig stars, which inherit large grains from parental molecular clouds. It has been thought that HD 98922, in particular, is a Herbig star because of its large infrared excess, but we propose it being in a more evolved stage. Because dust condenses out of stellar mass loss in an inside-out manner, the dusty envelope is spatially confined, and anisotropic mass flows, or anomalous optical properties of tiny grains, lead to the generally low line-of-sight extinction toward these stars.

Abstract Copyright: © ESO, 2016

Journal keyword(s): infrared: stars - submillimeter: stars - stars: emission-line, Be - circumstellar matter - stars: evolution

Status at CDS:  

CDS comments: Paragraph. 4 : DOG 105 not identified, HII region BSF 60 not identified, Paramian 16 not identified.

Simbad objects: 61

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Number of rows : 61

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3527 3
2 NAME Per Arm PoG 03 30 +45.0           ~ 1239 0
3 V* UX Ori Ae* 05 04 29.9881676817 -03 47 14.288047238 10.25 10.93 8.70 9.62 9.43 A4IVe 331 1
4 NGC 1788 RNe 05 06 54 -03 20.5   5.8       ~ 31 1
5 QSO J0530+13 QSO 05 30 56.41672 +13 31 55.1495     20.0 19.35   ~ 878 1
6 NAME Mon R2 HII 06 07 46.6 -06 22 59           ~ 646 2
7 QSO B0605-0834 QSO 06 07 59.69923743 -08 34 49.9781718     18.5 17.70   ~ 393 1
8 EM* MWC 137 Ae* 06 18 45.5220562759 +15 16 52.242746933 12.89 13.30 13.759 11.67 10.31 sgB[e]d 223 1
9 WV 340 Cld 06 28 -13.8           ~ 3 0
10 HD 45677 Be* 06 28 17.4219761127 -13 03 11.130589443 7.86 8.52 8.50 8.11 8.01 B2IV/V[e] 302 0
11 LDN 1607 DNe 06 30.8 +10 18           ~ 5 0
12 IC 446 Cl* 06 31 02.3 +10 26 06           ~ 48 1
13 NGC 2245 RNe 06 32 41.3 +10 09 34   11       A0 49 0
14 NGC 2247 RNe 06 33 04.4 +10 19 21   8.5       ~ 57 0
15 HD 259431 Ae* 06 33 05.1905483916 +10 19 19.987469692 8.39 8.95 8.72     B6ep 261 1
16 NAME Mon I MoC 06 35 +10.1           ~ 211 0
17 NGC 2264 OpC 06 40 58 +09 53.7     3.9     ~ 1582 1
18 2MASS J06495854-0738522 TT* 06 49 58.5544262255 -07 38 52.253233459   14.06 13.40     B9 16 0
19 GN 06.47.6.01 RNe 06 49 59 -07 38.9           ~ 2 0
20 HD 50138 Ae* 06 51 33.3989891154 -06 57 59.445949919 6.28 6.68 6.67     A1Ib/II 197 0
21 NGC 2302 OpC 06 51.9 -07 05           ~ 40 0
22 NGC 2306 OpC 06 54 25 -07 12.3           ~ 14 0
23 NGC 2309 OpC 06 56 08.5 -07 10 30           ~ 17 0
24 [FT96] 220.9-2.5A IR 06 57 08 -08 10.9           ~ 2 0
25 GN 06.54.8.03 RNe 06 57 11 -08 10.5           ~ 2 0
26 GN 06.54.8.01 RNe 06 57 14 -08 10.3           ~ 2 0
27 NGC 2323 OpC 07 02 47.5 -08 20 16           ~ 153 0
28 NAME CMa OB1 As* 07 07.0 -10 28           ~ 122 0
29 IC 468 HII 07 18 -13.1           ~ 1 0
30 LDN 1667 DNe 07 25.1 -25 46           ~ 11 0
31 LDN 1668 DNe 07 37.0 -24 54           ~ 5 0
32 TGU H1615 DNe 07 37.1 -24 51           ~ 2 0
33 CD-24 5721 Em* 07 39 06.1600084175 -24 45 04.947568695 10.84 11.42 10.94 10.79   B[e] 28 0
34 C 0739-242 OpC 07 41 18 -24 21.3           ~ 8 0
35 NAME GUM Nebula ISM 07 43 -42.1           ~ 387 1
36 NGC 2447 OpC 07 44 30 -23 51.4           ~ 116 1
37 NGC 2467 HII 07 52 18 -26 25.7           ~ 172 1
38 NGC 2547 OpC 08 09 52.360 -49 10 35.01           ~ 309 0
39 CD-49 3441 Be* 08 14 20.4678381993 -50 09 46.378422814   10.36 10.34     B8e 14 0
40 [DB2002b] G265.65-7.71 MoC 08 18 40 -49 43.9           ~ 10 0
41 BRAN 137 RNe 08 19 37.3 -50 07 12           ~ 12 0
42 WRAY 15-406 Em* 09 36 44.2096715780 -53 28 01.344715143     11.4     B:e 13 0
43 HD 85567 Be* 09 50 28.5375203189 -60 58 02.950579275 8.16 8.67 8.57     B5Vne 77 0
44 NGC 3114 OpC 10 02 36 -60 07.2   4.47 4.2     ~ 165 0
45 NGC 3372 HII 10 44 19.0 -59 53 21           ~ 885 2
46 HD 94878 bL* 10 55 58.9150038252 -60 23 33.434805592 8.67 9.37 8.70 8.07   B0/2eq 139 0
47 BRAN 350 RNe 11 13 39.0 -52 49 59           ~ 4 0
48 HD 98922 Be* 11 22 31.6740564115 -53 22 11.456030308   6.80 6.76     B9Ve 113 1
49 [DB2002b] G291.11+7.86 DNe 11 32.3 -53 12           ~ 4 0
50 [MCM2005b] 70 OpC 16 00 27 -52 10.8           ~ 5 0
51 HD 327083 s*b 17 15 15.3714469957 -40 20 06.793634106 12.07 11.44 10.00 9.64   B6Ieq 53 0
52 HD 163296 Ae* 17 56 21.2882188601 -21 57 21.872343282 7.00 6.93 6.85 6.86 6.67 A1Vep 789 0
53 [MCM2005b] 20 OpC 19 12 25 +09 57.7           ~ 10 0
54 * ups Sgr Be* 19 21 43.6228354 -15 57 18.062473 4.18 4.71 4.61 4.34 4.21 B2Vp_sh 283 0
55 PMN J1922-1525 Rad 19 22 34.10 -15 25 23.0           ~ 4 1
56 PMN J1924-1549 Rad 19 24 11.80 -15 49 02.0           ~ 7 1
57 EM* MWC 623 ** 19 56 31.5416098584 +31 06 20.123592142   11.98 10.92     K2Ib/II+B4III[e] 61 0
58 Kronberger 52 OpC 19 58 07.9 +30 53 18           ~ 8 1
59 IRAS 19592+3302 Y*O 20 01 09.9 +33 11 09           ~ 22 0
60 CTB 82 Mas 20 01.7 +33 33           ~ 36 0
61 NAME Cyg Arm PoG 20 02 +40.0           ~ 139 0

    Equat.    Gal    SGal    Ecl

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2020.06.05-11:50:49

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