1999AJ....117..225W


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.08CEST05:18:55

1999AJ....117..225W - Astron. J., 117, 225-237 (1999/January-0)

Some characteristics of current star formation in the 30 Doradus nebula revealed by HST/NICMOS.

WALBORN N.R., BARBA R.H., BRANDNER W., RUBIO M., GREBEL E.K. and PROBST R.G.

Abstract (from CDS):

The extensive ``second generation'' of star formation within the 30 Doradus Nebula, evidently triggered by the R136 central cluster around its periphery, has been imaged with the Near-Infrared Camera and Multi-Object Spectrometer (NICMOS) on the Hubble Space Telescope. Many new IR sources, including multiple systems, clusters, and nebular structures, are found in these images. Six of the NICMOS fields are described here, in comparison with the WFPC2 images of the same fields. Knots 1-3 of Walborn & Blades (early O stars embedded in dense nebular knots) are all found to be compact multiple systems. Knot 1 is shown to reside at the top of a massive dust pillar oriented directly toward R136, whose summit has just been removed, exposing the newborn stellar system. Knots 1 and 3 are also near the brightest IR sources in the region, while parsec-scale jet structures are discovered in association with Knots 2 and 3. The Knot 2 structures consist of detached, nonstellar IR sources aligned on either side of the stellar system, which are interpreted as impact points of a highly collimated, possibly rotating bipolar jet on the surrounding dark clouds; the H2O maser found by Whiteoak et al. is also in this field. These outflows from young massive stars in 30 Dor are the first extragalactic examples of the phenomenon. In the field of the pillars south of R136, recently discussed in comparison with the M16 pillars by Scowen et al., a new luminous stellar IR source has been discovered. These results establish the 30 Doradus Nebula as a prime region in which to investigate the formation and very early evolution of massive stars and multiple systems. The theme of triggered formation within the heads of extensive dust pillars oriented toward R136 is strong. In addition, these results provide further insights into the global structure and evolution of 30 Doradus, which are significant in view of its status as the best resolved extragalactic starburst.

Abstract Copyright:

Journal keyword(s): Galaxies: Starburst - ISM: H II Regions - Infrared Radiation - ISM: Individual: Name: 30 Doradus - ISM: Molecules - Galaxies: Magellanic Clouds - Stars: Formation

CDS comments: Knots are [WB87], sources IRSN and IRSW are [RBW98] IRSN and [RBW98] IRSW.

Simbad objects: 24

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Number of rows : 24

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 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5134 1
2 NGC 604 HII 01 34 32.1 +30 47 01           ~ 544 0
3 LHA 120-N 11 HII 04 56 51.4 -66 24 24           ~ 234 0
4 HH 1 HH 05 36 20.8 -06 45 13           ~ 401 1
5 [RBW98] IRSW-11 Y*O 05 38 33.09 -69 06 11.8           ~ 8 0
6 [RBW98] IRSW-26 IR 05 38 34.30 -69 05 58.7           ~ 4 0
7 2MASS J05383469-6906061 Y*O 05 38 34.5978198118 -69 06 05.904057601   16.79 16.03   15.49 O7-8V 15 0
8 2MASS J05383461-6905569 Y*O 05 38 34.619 -69 05 56.92     18.41   16.75 ~ 16 0
9 RRG 30 Dor W IRS 6 * 05 38 35.304 -69 06 09.00     16.82   15.05 ~ 5 0
10 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1039 2
11 RMC 138 sg* 05 38 36.1319623810 -69 05 57.970666081   12.07 11.74   11.45 A0Ia 28 0
12 RMC 136 Cl* 05 38 42.396 -69 06 03.36           ~ 1734 1
13 Cl* NGC 2070 SMB 171 * 05 38 44.970 -69 05 07.69   15.51 15.51   15.61 O9:((n)) 16 0
14 2MASS J05384507-6905086 Y*O 05 38 45.073 -69 05 08.64   14.73 14.72     O9V(n)p 18 0
15 SSTISAGEMA J053846.84-690505.4 IR 05 38 46.84 -69 05 05.4           ~ 9 0
16 [RBW98] IRSN-125 IR 05 38 46.89 -69 04 41.0           ~ 2 0
17 30Dor-NIC 12d Y*O 05 38 47.02 -69 05 01.7           ~ 11 0
18 RRG 30 Dor N IRS 5 * 05 38 47.50 -69 04 38.6           ~ 5 0
19 NAME Walborn 2 ** 05 38 48.1018 -69 04 42.239   15.66 15.39     O2V((f*))z 27 0
20 RRG 30 Dor N IRS 2 * 05 38 48.20 -69 04 45.5           ~ 4 0
21 30Dor-NIC 15b IR 05 38 48.20 -69 04 11.4           ~ 7 0
22 RRG 30 Dor N IRS 6a Y*O 05 38 48.45 -69 04 12.0           ~ 5 0
23 2MASS J05384921-6904445 Y*O 05 38 49.215 -69 04 44.55           ~ 10 0
24 HH 111 HH 05 51 44.2 +02 48 34           ~ 385 0

    Equat.    Gal    SGal    Ecl

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