2006A&A...445..971P

Query : 2006A&A...445..971P

2006A&A...445..971P - Astronomy and Astrophysics, volume 445971-978 (2006/1-3)

Mid-infrared images of the massive star forming region W75 N.

PERSI P., TAPIA M. and SMITH H.A.

Abstract (from CDS):

An infrared study that includes ground-based mid-infrared images between 8.7 and 18.7µm and IRAC images at 3.6, 4.5, 5.8 and 8.0µm of the W75 N massive star forming region is presented. The 12.5µm image shows the presence of four mid-infrared sources in the region W75 N(B), three of which have bright near-infrared counterparts, IRS 1, IRS 2 and IRS 3, all with significant excess emission at λ>2.0µm. IRS 2 has a steep energy distribution and the computed infrared luminosity is consistent with the presence of a young B3 star. The observed IRAC colors of IRS 3 indicate that this source is a Class II intermediate mass young star, consistent with its infrared energy distribution and luminosity. The fourth, newly discovered, mid-infrared source appears coincident with the ultracompact HII region VLA 3, and is located within the millimeter core MM 1. We derived a luminosity of ∼750L☉ and a visual extinction AV≃90 for this source. From the IRAC images, we detected 75 sources in an area of 120''x120 '' centered in W75 N. At least 25 of these sources are associated with the molecular cloud and form a young stellar cluster as shown in the IRAC two-color and the H-Ks versus Ks-[3.6] diagrams.

Abstract Copyright: ∼

Journal keyword(s): stars: formation - infrared: stars - ISM: clouds - ISM: HII regions

VizieR on-line data: <Available at CDS (J/A+A/445/971): table3.dat>

Nomenclature: Table 3: [PTS2006] NN (Nos 1-75).

Simbad objects: 22

goto Full paper

goto View the references in ADS

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 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0V 2787 1
2 * gam Aql * 19 46 15.5789542266 +10 36 47.731401477 5.93 4.23 2.72 1.65 0.87 K3II 450 0
3 NAME Cyg X Cld 20 30 04.7973633 +40 51 36.002197           ~ 962 1
4 [YST88] IRS 2 Y*O 20 38 35.37 +42 37 13.7           ~ 11 0
5 NAME Cyg X FIR 33 Y*O 20 38 35.9 +42 37 22           B1.5 423 1
6 [S2001] MM 2 mm 20 38 35.92 +42 37 32.1           ~ 14 0
7 [S2001] MM 4 mm 20 38 36.30 +42 37 29.9           ~ 5 0
8 [S2001] MM 1 mm 20 38 36.39 +42 37 34.1           ~ 17 0
9 NAME W75N(B) cor 20 38 36.44 +42 37 34.1           ~ 52 0
10 [HRB81] W75N(Ba) HII 20 38 36.445 +42 37 34.82           ~ 55 0
11 [TGR97] VLA 2 HII 20 38 36.482 +42 37 34.08           ~ 63 0
12 [HRB81] W75N(Bb) HII 20 38 36.486 +42 37 33.44           ~ 38 0
13 [HRB81] W75N(Bc) Rad 20 38 36.533 +42 37 32.04           ~ 10 0
14 [DKS2007] W75N-IRS 1 IR 20 38 36.76 +42 37 29.4           ~ 17 0
15 [S2001] MM 3 mm 20 38 37.05 +42 37 37.4           ~ 14 0
16 [HRB81] W75N(A) HII 20 38 37.6 +42 38 00           ~ 10 0
17 [S2001] MM 5 mm 20 38 37.78 +42 37 59.0           ~ 4 0
18 [HRB81] W75N(C) HII 20 38 39.1 +42 36 51           ~ 8 0
19 [YST88] IRS 3 * 20 38 39.1 +42 37 21           ~ 8 0
20 DR 21 SFR 20 39 01.6 +42 19 38           O4.5 1121 0
21 * mu. Cep s*r 21 43 30.4595558543 +58 46 48.165937434 8.85 6.43 4.08 1.98 0.22 M2-Ia 695 1
22 * bet Peg LP* 23 03 46.45746 +28 04 58.0336 6.05 4.09 2.42 0.92 -0.40 M2.5II-III 606 1

To bookmark this query, right click on this link: simbad:objects in 2006A&A...445..971P and select 'bookmark this link' or equivalent in the popup menu