2003A&A...400..575H

Query : 2003A&A...400..575H

2003A&A...400..575H - Astronomy and Astrophysics, volume 400575-583 (2003/3-3)

Mid-IR observations of small stellar clusters surrounding Herbig AeBe stars.

HABART E., TESTI L., NATTA A. and VANZI L.

Abstract (from CDS):

We present TIMMI2 observations at 10µm of 12 fields centered on known Herbig AeBe (HAeBe) stars. We detected sources (in addition to the HAeBe star) in five fields, three of which are associated with early B stars. Using complementary near-IR and optical data, we estimate that the detected sources are young, embedded (AV∼5-24mag), intermediate-mass objects (∼1.5-3.5M☉). In four objects the 10µm emission can be accounted for by a circumstellar disk, while in 2 cases (possibly 3) there is evidence that the objects are still in an earlier stage of evolution (Class I). These results confirm the association of the early B Herbig stars with rather rich clusters, as well as their very young age. If our estimates of the stellar parameters are confirmed, this would be the largest sample so far of embedded, intermediate-mass objects available for further studies.

Abstract Copyright: ∼

Journal keyword(s): stars: formation - stars: pre-main sequence - infrared: stars - open clusters and associations: general - circumstellar matter

Nomenclature: Table 2: [HTN2003] MWC 297 N (Nos 1-2), [HTN2003] V921 Sco N (Nos 1-4), [HTN2003] LSS 3027B N (No. 1), [HTN2003] VY Mon N (Nos 1-2), [HTN2003] HD 97048 N (Nos 1-2).

CDS comments: T.2: LSS 3027B = [ST89] LSS 3027 B in SIMBAD

Simbad objects: 25

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Number of rows : 25
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 * pi. Cet SB* 02 44 07.3477594066 -13 51 31.279407049 3.66 4.112 4.236     B8IV 349 0
2 [KW97] 29-16 Em* 06 31 02.5567147920 +10 26 09.354931224   13.72 12.91 12.52   ~ 4 0
3 [HTN2003] VY Mon 2 * 06 31 04.1338244856 +10 25 50.422430856       16.18   ~ 2 0
4 V* VY Mon Ae* 06 31 06.9271406952 +10 26 04.952351076 16.65 15.45 13.70 12.49 11.00 A5:Vep 97 0
5 Ass Cha T 1-16 Or* 11 07 57.9428053584 -77 38 44.977882344   15.1 14.2   13.04 K4-7 79 0
6 ESO-HA 562 Or* 11 08 02.8789169712 -77 38 42.580139640     17.61   14.41 M0.5+M0.5 59 0
7 HD 97048 Ae* 11 08 03.3109731720 -77 39 17.490777444 9.03 8.76 9.00   8.64 A0Vep 590 0
8 [HTN2003] HD 97048 2 IR 11 08 03.6 -77 38 42           ~ 3 0
9 [HTN2003] HD 97048 1 IR 11 08 08.6 -77 38 45           ~ 1 0
10 CD-48 7859 Be* 13 01 17.8030714320 -48 53 18.799911852   10.65 10.58     B5e 61 0
11 [ST89] LSS 3027 B * 13 19 03.5602676756 -62 34 08.993802899           ~ 5 0
12 CPD-61 3587 Y*O 13 19 03.9700032233 -62 34 10.159085928 10.48 11.02 10.73 10.80   B2V 44 1
13 HD 149914 Or* 16 38 28.6527873384 -18 13 13.713126384   6.967 6.746     B9.5IV 82 0
14 [HTN2003] V921 Sco 1 IR 16 55 32.6 -42 42 02           ~ 1 0
15 [HTN2003] V921 Sco 2 IR 16 55 33.9 -42 42 03           ~ 1 0
16 [HTN2003] V921 Sco 4 IR 16 55 34.2 -42 42 18           ~ 1 0
17 [HTN2003] V921 Sco 3 IR 16 55 34.3 -42 42 02           ~ 1 0
18 CD-42 11721 Be* 16 59 06.7629322176 -42 42 08.404228224 12.16 12.28 11.00     B0IVe 179 0
19 EM* LkHA 119 Ae* 18 05 56.4827952792 -24 16 00.487554744   13 10.685     B1Ve 27 0
20 2MASS J18273709-0349385 Y*O 18 27 37.0934499672 -03 49 38.513854560           ~ 14 0
21 2MASS J18273854-0350108 Y*O 18 27 38.5442710800 -03 50 10.894534044           ~ 4 0
22 EM* MWC 297 Ae* 18 27 39.5265500160 -03 49 52.133050776 15.57 14.34 12.31 11.34   B1.5Ve 315 0
23 V* VV Ser Ae* 18 28 47.8620017808 +00 08 39.923474964 12.99 12.63 11.80 11.01 10.24 A5Ve 262 0
24 V* TY CrA Ae* 19 01 40.8284458320 -36 52 33.816176040 10.03 9.92 9.39     B9e 301 0
25 HD 179218 Ae* 19 11 11.2538919456 +15 47 15.636008472 7.55 7.476 7.39 7.25 7.21 A0Ve 273 0

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