2016ApJ...833..209O


Query : 2016ApJ...833..209O

2016ApJ...833..209O - Astrophys. J., 833, 209-209 (2016/December-3)

Dense core properties in the infrared dark cloud G14.225-0.506 revealed by ALMA.

OHASHI S., SANHUEZA P., CHEN H.-R.V., ZHANG Q., BUSQUET G., NAKAMURA F., PALAU A. and TATEMATSU K.

Abstract (from CDS):

We have performed a dense core survey toward the Infrared Dark Cloud G14.225-0.506 at 3 mm continuum emission with the Atacama Large Millimeter/Submillimeter Array (ALMA). This survey covers the two hub-filament systems with an angular resolution of ∼3′′ (∼0.03 pc). We identified 48 dense cores. 20 out of the 48 cores are protostellar due to their association with young stellar objects (YSOs) and/or X-ray point-sources, while the other 28 cores are likely prestellar and unrelated with known IR or X-ray emission. Using APEX 870 µm continuum emission, we also identified the 18 clumps hosting these cores. Through virial analysis using the ALMA N2H+ and VLA/Effelsberg NH3 molecular line data, we found a decreasing trend in the virial parameter with decreasing scales from filaments to clumps, and then to cores. The virial parameters of 0.1-1.3 in cores indicate that cores are likely undergoing dynamical collapse. The cumulative core mass function for the prestellar core candidates has a power law index of α=1.6, with masses ranging from 1.5 to 22 M. We find no massive prestellar or protostellar cores. Previous studies suggest that massive O-type stars have not been produced yet in this region. Therefore, high-mass stars should be formed in the prestellar cores by accreting a significant amount of gas from the surrounding medium. Another possibility is that low-mass YSOs become massive by accreting from their parent cores that are fed by filaments. These two possibilities might be consistent with the scenario of global hierarchical collapse.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): ISM: clouds - ISM: individual: G14.225-0.506 - stars: formation - stars: formation

Nomenclature: Table 1: [OSC2016] N-NN (Nos N-1 to N-29), [OSC2016] S-NN (Nos S-1 to S-19). Table 2: [OSC2016] NN (Nos 1-18).

Status at CDS : All or part of tables of objects could be ingested in SIMBAD; there are some issues with cross-identifications or classifications.

Simbad objects: 18

goto Full paper

goto View the references in ADS

Number of rows : 18
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1568 1
2 NAME Ori A MoC 05 38 -07.1           ~ 2896 0
3 QSO B1730-130 QSO 17 33 02.70578907 -13 04 49.5482119   18 18.5 18.78 17.39 ~ 1085 1
4 [BEP2016] Hub-N MM1b mm 18 18 12.30 -16 49 28.7           ~ 2 0
5 [BEP2016] Hub-N MM1c mm 18 18 12.32 -16 49 31.9           ~ 2 0
6 [BEP2016] Hub-N MM1a mm 18 18 12.32 -16 49 28.1           ~ 3 0
7 [BEP2016] Hub-N MM1d mm 18 18 12.33 -16 49 30.5           ~ 2 0
8 2MASS J18181234-1649251 Y*? 18 18 12.343 -16 49 25.20           ~ 3 0
9 [BEP2016] Hub-N MM1e mm 18 18 12.37 -16 49 26.9           ~ 2 0
10 [BEP2016] Hub-S MM5c mm 18 18 12.90 -16 57 24.0           ~ 2 0
11 [PW2010] 165 Y*? 18 18 13.171 -16 57 23.30           ~ 3 0
12 [BEP2016] Hub-S MM5a mm 18 18 13.34 -16 57 24.1           ~ 3 0
13 NAME M17 SWex MoC 18 19.0 -16 40           ~ 44 0
14 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1574 0
15 AGAL G028.344+00.061 cor 18 42 50.45 -04 03 17.7           ~ 78 0
16 NAME Dragon Nebula DNe 18 42 50.6 -04 03 30           ~ 137 0
17 MSXDC G034.43+0.24 MoC 18 53 18.9 +01 26 39           ~ 88 0
18 QSO B1921-293 BLL 19 24 51.05595254 -29 14 30.1210248   18.71 18.21 15.07   ~ 802 0

To bookmark this query, right click on this link: simbad:objects in 2016ApJ...833..209O and select 'bookmark this link' or equivalent in the popup menu


2023.01.29-16:24:29

© Université de Strasbourg/CNRS

    • Contact