2002ApJ...564L..35C

Query : 2002ApJ...564L..35C

2002ApJ...564L..35C - Astrophys. J., 564, L35-L38 (2002/January-1)

Detection of a candidate for the exciting source of the expanding water maser bubble in Cepheus A.

CURIEL S., TRINIDAD M.A., CANTO J., RODRIGUEZ L.F., TORRELLES J.M., HO P.T.P., PATEL N.A., GREENHILL L., GOMEZ J.F., GARAY G., HERNANDEZ L., CONTRERAS M.E. and ANGLADA G.

Abstract (from CDS):

We report sensitive, high angular resolution VLA 3.6 cm and 7 mm continuum observations toward the star-forming region Cepheus A. Three embedded young stellar objects (YSOs) were found within a projected area of ≃0".6x0".6 (400x400 AU2). One of the sources is the already known radio continuum jet HW2 (detected at 3.6 cm and 7 mm), while the other two weak sources were not previously known. One of these two new sources is detected only at 7 mm and is located ≃0".15 south from HW2. The other source, detected only at 3.6 cm, is located 0".6 south from HW2 and nearly coincides with the center of the enigmatic expanding bubble of water masers recently detected with the Very Long Baseline Array. We suggest that this radio continuum source is the embedded YSO powering the water maser structure, but its nature is still unknown at present. We also discuss possible scenarios that could explain the surprisingly precise spherical geometry of the water maser bubble.

Abstract Copyright: ∼

Journal keyword(s): ISM: Individual: Name: Cepheus A - ISM: Jets and Outflows - Radio Continuum: ISM - Stars: Formation

Nomenclature: Table 2: [CTC2002] VLA-mm N=1, [CTC2002] VLA-RN (Nos R4, R5).

Simbad objects: 11

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Number of rows : 11
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 HH 211 Y*O 03 43 56.52 +32 00 52.8           ~ 414 0
2 RAFGL 5123 Y*O 04 31 34.07736 +18 08 04.9020           K3V/M3III 900 0
3 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2397 1
4 6C 222905+693121 BLL 22 30 36.46973826 +69 46 28.0769147     19.6 20.11   ~ 105 1
5 NAME Cep A HW 2 Y*O 22 56 17.9 +62 01 49           B0.5 243 0
6 NAME Cepheus A SFR 22 56 17.9 +62 01 49           ~ 760 2
7 [CTC2002] VLA-R5 reg 22 56 17.977 +62 01 49.04           ~ 14 0
8 [CTC2002] VLA-mm mm 22 56 17.9845 +62 01 49.447           ~ 2 0
9 [PTU2009] h11 Rad 22 56 18.0 +62 01 46           ~ 27 0
10 [CTC2002] VLA-R4 Mas 22 56 18 +62 01.8           ~ 7 0
11 [TPG2001] R4-A Mas ~ ~           ~ 3 0

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