2011A&A...526A..24V


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST15:40:43

2011A&A...526A..24V - Astronomy and Astrophysics, volume 526A, 24-24 (2011/2-1)

Distinguishing post-AGB impostors in a sample of pre-main sequence stars.

VIEIRA R.G., GREGORIO-HETEM J., HETEM A.Jr, STASINSKA G. and SZCZERBA R.

Abstract (from CDS):

A sample of 27 sources, cataloged as pre-main sequence stars by the Pico dos Dias Survey (PDS), is analyzed to investigate a possible contamination by post-AGB stars. The far-infrared excess due to dust present in the circumstellar envelope is typical of both categories: young stars and objects that have already left the main sequence and are suffering severe mass loss. The two known post-AGB stars in our sample inspired us to seek for other very likely or possible post-AGB objects among PDS sources previously suggested to be Herbig Ae/Be stars, by revisiting the observational database of this sample. In a comparative study with well known post-AGBs, several characteristics were evaluated: (i) parameters related to the circumstellar emission; (ii) spatial distribution to verify the background contribution from dark clouds; (iii) spectral features; and (iv) optical and infrared colors. These characteristics suggest that seven objects of the studied sample are very likely post-AGBs, five are possible post-AGBs, eight are unlikely post-AGBs, and the nature of seven objects remains unclear.

Abstract Copyright:

Journal keyword(s): stars: AGB and post-AGB - infrared: stars - circumstellar matter - stars: pre-main sequence

CDS comments: Table 2 : clouds FS NNN not identfied.

Simbad objects: 50

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Number of rows : 50

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 Cl* Melotte 25 LH 214 LM* 04 19 41.7312002875 +16 45 22.077922738     21.05     M7 10 0
2 LDN 1521F DNe 04 28 39.3 +26 51 43           ~ 183 1
3 Bad 16 Y*O 04 30 50.2775823865 +23 00 08.771252817       14.95   F1 132 0
4 LDN 1536 DNe 04 33 24.6 +22 43 29           ~ 94 0
5 V* AB Aur Ae* 04 55 45.8459978418 +30 33 04.293281305 7.20 7.16 7.05 6.96 6.70 A0Ve 930 2
6 2MASS J05065551-0321132 TT* 05 06 55.5165285839 -03 21 13.326596208 13.54 13.65 12.84 12.18 11.42 B3e 32 1
7 LDN 1616 DNe 05 07 00 -03 21.1           ~ 27 0
8 Parenago 2649 Ae* 05 38 09.3040922103 -06 49 16.597267355   15.37 13.75 12.85   A5e 51 0
9 V* V599 Ori Or* 05 38 58.6395431132 -07 16 45.627263335   15.39 13.70 12.61   A8.9 39 0
10 LDN 1641 MoC 05 39.0 -07 00           ~ 426 0
11 LDN 1647 DNe 05 42.4 -09 58           ~ 24 1
12 EM* MWC 778 Em* 05 50 13.8997875650 +23 52 17.697302024 13.45 13.72 12.80     BQ[] 25 0
13 V* V1818 Ori Ae* 05 53 42.5561700474 -10 24 00.722803103     13.40     Ae 32 0
14 LDN 1557 DNe 06 06.2 +30 00           ~ 10 0
15 IRAS 06040+2958 Y*O 06 07 15.3938895161 +29 57 55.037072943   15.3 14.0     B2 20 0
16 LDN 1570 DNe 06 07 28.4 +19 28 04           ~ 38 0
17 2MASS J06235631+1430280 Y*O 06 23 56.3106423148 +14 30 28.087459322 15.67 15.67 14.67     B2 26 0
18 LDN 1600 DNe 06 30.8 +12 58           ~ 5 0
19 LDN 1659 DNe 07 17.6 -23 20           ~ 5 0
20 SS 103 Ae* 07 19 35.9393464619 -17 39 17.929782345 14.61 14.32 13.0     B2?e 43 0
21 LDN 1665 DNe 07 35.1 -23 37           ~ 3 0
22 IRAS 07394-1953 Ae? 07 41 41.0563894919 -20 00 13.461939117           B3 9 0
23 IRAS 09245-5228 Ae? 09 26 11.080392 -52 42 26.86932   15.51 14.55 14.36 13.54 B7 11 0
24 THA 35-II-3 Em* 10 10 00.3245938303 -57 02 07.351422060     12.5     B2? 34 1
25 HD 100546 Be* 11 33 25.4404858122 -70 11 41.239343121   6.71 6.30   6.64 A0VaekB8_lB 651 1
26 WRAY 16-110 Ae* 12 22 23.1621616129 -63 17 16.880452567   13.88 13.08     B6Ve 42 0
27 V* DK Cha Or* 12 53 17.2028372976 -77 07 10.727661977           F0 132 0
28 IRAS 13445-3624 Ae? 13 47 31.4083329802 -36 39 49.611658153   17.2 15.7   14.22 O9 8 0
29 Hen 3-938 Em* 13 52 42.8518766450 -63 32 49.168616918 15.33 15.03 13.50     O9 24 0
30 LP 271-25 LM* 14 28 43.2272685950 +33 10 39.245755294   21.2   17.8   M9Ve 233 0
31 IRAS 15310-6149 pA? 15 35 17.1323075044 -61 59 04.219494455   14.35 13.54     F0Ve 11 0
32 GSC 07855-00815 * 16 05 03.9081582025 -39 45 03.767552355   14.54 13.93     A5V 13 0
33 IRAS 16513-4316A Ae? 16 54 59.1863178807 -43 21 49.706291428   13.99 13.42     A0 17 0
34 LDN 273 DNe 17 44.4 -17 36           ~ 3 0
35 Hen 3-1475 PN 17 45 14.1763468506 -17 56 46.890631888   13.84 12.87     B7e 189 0
36 HD 163296 Ae* 17 56 21.2882188601 -21 57 21.872343282 7.00 6.93 6.85 6.86 6.67 A1Vep 802 0
37 LDN 318 DNe 17 59.9 -16 50           ~ 3 0
38 IRAS 17575-1647 Ae? 18 00 30.3163419433 -16 47 25.870839519 15.67 15.54 14.42     B1 11 0
39 LDN 511 DNe 18 25.6 -03 38           ~ 3 0
40 EM* MWC 297 Ae* 18 27 39.5266257570 -03 49 52.136526892 15.57 14.34 12.31 11.34   B1.5Ve 266 0
41 IRAS 18275+0040 Y*O 18 30 06.1724662068 +00 42 33.550675181   17.27 15.55 13.34   F3Ve 18 0
42 LDN 571 DNe 18 30.6 +00 02           ~ 4 0
43 LDN 637 DNe 18 41 +08.1           ~ 7 0
44 IRAS 18391+0805 Ae? 18 41 34.3702330047 +08 08 20.702597199   14.61 14.04     F0V? 10 0
45 LDN 621 DNe 18 47.5 +03 13           ~ 4 0
46 PN G035.1+02.0 PN 18 48 00.6606741765 +02 54 17.125844015 15.03 14.397 12.395     B0.5Ib 21 0
47 IRAS 18528+0400 Ae? 18 55 22.9805140090 +04 04 35.205345340     16.6     O9 11 0
48 LDN 628 DNe 18 58.5 +03 26           ~ 5 0
49 Min 1-92 pA* 19 36 18.9292148675 +29 32 49.838032394 12.13 12.35 11.75 11.54   B0.5IV[e] 236 1
50 LDN 813 DNe 19 43.0 +29 07           ~ 3 0

    Equat.    Gal    SGal    Ecl

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2020.07.04-15:40:43

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