2022A&A...657A...3G


Query : 2022A&A...657A...3G

2022A&A...657A...3G - Astronomy and Astrophysics, volume 657A, 3-3 (2022/1-1)

Clustered star formation at early evolutionary stages. Physical and chemical analysis of the young star-forming regions ISOSS J22478+6357 and ISOSS J23053+5953.

GIESER C., BEUTHER H., SEMENOV D., SURI S., SOLER J.D., LINZ H., SYED J., HENNING T., FENG S., MOLLER T., PALAU A., WINTERS J.M., BELTRAN M.T., KUIPER R., MOSCADELLI L., KLAASSEN P., URQUHART J.S., PETERS T., LONGMORE S.N., SANCHEZ-MONGE A., GALVAN-MADRID R., PUDRITZ R.E. and JOHNSTON K.G.

Abstract (from CDS):

Context. The process of high-mass star formation during the earliest evolutionary stages and the change over time of the physical and chemical properties of individual fragmented cores are still not fully understood. Aims. We aim to characterize the physical and chemical properties of fragmented cores during the earliest evolutionary stages in the very young star-forming regions ISOSS J22478+6357 and ISOSS J23053+5953. Methods. NOrthern Extended Millimeter Array 1.3 mm data are used in combination with archival mid- and far-infrared Spitzer and Herschel telescope observations to construct and fit the spectral energy distributions of individual fragmented cores. The radial density profiles are inferred from the 1.3 mm continuum visibility profiles, and the radial temperature profiles are estimated from H2CO rotation temperature maps. Molecular column densities are derived with the line fitting tool XCLASS. The physical and chemical properties are combined by applying the physical-chemical model MUlti Stage ChemicaL codE in order to constrain the chemical timescales of a few line-rich cores. The morphology and spatial correlations of the molecular emission are analyzed using the histogram of oriented gradients (HOG) method. Results. The mid-infrared data show that both regions contain a cluster of young stellar objects. Bipolar molecular outflows are observed in the CO 2-1 transition toward the strong millimeter (mm) cores, indicating protostellar activity. We find strong molecular emission of SO, SiO, H2CO, and CH3OH in locations that are not associated with the mm cores. These shocked knots can be associated either with the bipolar outflows or, in the case of ISOSS J23053+5953, with a colliding flow that creates a large shocked region between the mm cores. The mean chemical timescale of the cores is lower (∼20 000 yr) compared to that of the sources of the more evolved CORE sample (∼60 000 yr). With the HOG method, we find that the spatial emission of species that trace the extended emission and of shock-tracing molecules are well correlated within transitions of these groups. Conclusions. Clustered star formation is observed toward both regions. Comparing the mean results of the density and temperature power-law index with the results of the original CORE sample of more evolved regions, it appears that neither change significantly from the earliest evolutionary stages to the hot molecular core stage. However, we find that the 1.3 mm flux, kinetic temperature, H2 column density, and core mass of the cores increase in time, which can be traced both in the M/L ratio and the chemical timescale, τchem.

Abstract Copyright: © C. Gieser et al. 2021

Journal keyword(s): stars: formation - stars: protostars - astrochemistry - ISM: individual objects: ISOSS J22478+6357 - ISM: individual objects: ISOSS J23053+5953

Simbad objects: 54

goto Full paper

goto View the references in ADS

Number of rows : 54
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 MPCM J022530.99+620620.9 HII 02 25 31.18 +62 06 24.5           O8V-B0.5V 101 1
2 MSX6C G139.9091+00.1969 Y*O 03 07 24.0 +58 30 49           ~ 8 0
3 GAL 174.20-00.08 Cld 05 30 45.9 +33 47 56           ~ 198 2
4 M 42 OpC 05 35 17 -05 23.4           ~ 3970 0
5 NAME Musca Filament PoC 10 54 -74.0           ~ 32 0
6 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1193 1
7 NAME NGC 6334 FIR V Cl* 17 19 57 -35 57.5           ~ 90 0
8 NGC 6334 HII 17 20 53 -36 07.9           ~ 654 0
9 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13433 0
10 NAME the Brick MoC 17 46 09 -28 43.8           ~ 181 0
11 NAME HH 80-81 HH 18 19 06 -20 51.4           ~ 208 0
12 AGAL G028.344+00.061 cor 18 42 50.45 -04 03 17.7           ~ 78 0
13 MSXDC G035.39-0.33 MoC 18 57 09.0 +02 07 46           ~ 108 0
14 SH 2-106 HII 20 27 26.8 +37 22 49           ~ 432 2
15 RAFGL 2591 Y*O 20 29 24.8230 +40 11 19.590           ~ 605 0
16 [MBS2007c] CygX-N44 Rad 20 39 01.01 +42 22 50.2           ~ 388 0
17 IRAS 22134+5834 Y*O 22 15 09.02616 +58 49 08.8608           ~ 70 0
18 LDN 1204A DNe 22 21 22.5 +63 51 13           ~ 104 0
19 [BGS2021] ISOSS22478 10 cor 22 47 45.65 +63 56 27.1           ~ 2 0
20 [BGS2021] ISOSS22478 4 cor 22 47 46.42 +63 56 49.8           ~ 2 0
21 [BGS2021] ISOSS22478 3 cor 22 47 46.56 +63 56 49.1           ~ 2 0
22 [BGS2021] ISOSS22478 5 cor 22 47 48.15 +63 56 44.3           ~ 2 0
23 [BGS2021] ISOSS22478 11 cor 22 47 49.40 +63 56 52.1           ~ 2 0
24 [BGS2021] ISOSS22478 15 cor 22 47 49.87 +63 56 45.8           ~ 2 0
25 JCMTSF J224749.9+635647 smm 22 47 49.9 +63 56 47           ~ 2 0
26 [BGS2021] ISOSS22478 13 cor 22 47 50.02 +63 56 45.0           ~ 2 0
27 [BGS2021] ISOSS22478 6 cor 22 47 50.39 +63 56 57.1           ~ 2 0
28 [BGS2021] ISOSS22478 9 cor 22 47 50.43 +63 56 46.6           ~ 2 0
29 [BGS2021] ISOSS22478 7 cor 22 47 50.67 +63 57 00.6           ~ 2 0
30 [BGS2021] ISOSS22478 8 cor 22 47 50.88 +63 56 41.2           ~ 2 0
31 [BGS2021] ISOSS22478 1 cor 22 47 51.08 +63 56 43.7           ~ 2 0
32 [BGS2021] ISOSS22478 14 cor 22 47 51.19 +63 57 00.3           ~ 2 0
33 [BGS2021] ISOSS22478 12 cor 22 47 51.22 +63 56 38.4           ~ 2 0
34 [BGS2021] ISOSS22478 2 cor 22 47 52.68 +63 56 34.6           ~ 2 0
35 [HBK2008] J22478+6357 SMM1 W smm 22 47 54.1 +63 57 11           ~ 3 0
36 [HBK2008] J22478+6357 SMM1 E smm 22 47 54.1 +63 57 11           ~ 3 0
37 IRAS 22460+6341 IR 22 47 54.1 +63 57 11           ~ 8 0
38 [BGS2021] ISOSS23053 12 cor 23 05 19.82 +59 54 02.6           ~ 2 0
39 [BGS2021] ISOSS23053 4 cor 23 05 19.99 +59 53 55.2           ~ 2 0
40 [BGS2021] ISOSS23053 8 cor 23 05 20.34 +59 53 43.2           ~ 2 0
41 [BGS2021] ISOSS23053 10 cor 23 05 20.74 +59 53 52.1           ~ 2 0
42 [BGS2021] ISOSS23053 11 cor 23 05 21.38 +59 53 53.0           ~ 2 0
43 [BGS2021] ISOSS23053 1 cor 23 05 21.62 +59 53 43.2           ~ 2 0
44 [BGS2021] ISOSS23053 5 cor 23 05 21.84 +59 53 46.1           ~ 2 0
45 [BGS2021] ISOSS23053 9 cor 23 05 22.41 +59 53 46.2           ~ 2 0
46 IRAS 23032+5937 HII 23 05 23.1 +59 53 53           ~ 37 0
47 [BGS2021] ISOSS23053 3 cor 23 05 23.15 +59 53 54.9           ~ 2 0
48 BGPS G109.995-00.282 mm 23 05 23.2579 +59 53 58.032           ~ 8 0
49 [BGS2021] ISOSS23053 2 cor 23 05 23.54 +59 53 54.7           ~ 2 0
50 [BGS2021] ISOSS23053 13 cor 23 05 23.78 +59 53 51.7           ~ 2 0
51 [BGS2021] ISOSS23053 6 cor 23 05 23.79 +59 54 01.0           ~ 2 0
52 [BGS2021] ISOSS23053 14 cor 23 05 24.42 +59 54 01.7           ~ 2 0
53 [BGS2021] ISOSS23053 7 cor 23 05 24.57 +59 53 59.4           ~ 2 0
54 NGC 7538S Y*O 23 13 44.8 +61 26 51           ~ 84 1

To bookmark this query, right click on this link: simbad:objects in 2022A&A...657A...3G and select 'bookmark this link' or equivalent in the popup menu


2023.01.31-01:25:51

© Université de Strasbourg/CNRS

    • Contact