2017A&A...602L...2H

Query : 2017A&A...602L...2H

2017A&A...602L...2H - Astronomy and Astrophysics, volume 602, L2-2 (2017/6-1)

Gravitational collapse of the OMC-1 region.

HACAR A., ALVES J., TAFALLA M. and GOICOECHEA J.R.

Abstract (from CDS):

We have investigated the global dynamical state of the integral shaped filament in the Orion A cloud using new N₂H⁺ (1-0) large-scale, IRAM 30m observations. Our analysis of its internal gas dynamics reveals the presence of accelerated motions towards the Orion Nebula Cluster, showing a characteristic blue-shifted profile centred at the position of the OMC-1 South region. The properties of these observed gas motions (profile, extension, and magnitude) are consistent with the expected accelerations for the gravitational collapse of the OMC-1 region and explain both the physical and kinematic structure of this cloud.

Abstract Copyright: © ESO, 2017

Journal keyword(s): ISM: clouds - ISM: kinematics and dynamics - ISM: structure - stars: formation - submillimeter: ISM - submillimeter: ISM

Simbad objects: 12

Full paper

View the references in ADS

Number of rows : 12

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Sp type	#ref 1850 - 2023	#notes
1	NAME Orion Nebula Cluster	OpC	05 35.0	-05 29	~	2210	1
2	NAME OMC-1	MoC	05 35 14	-05 22.4	~	1127	2
3	NAME Orion-KL	SFR	05 35 14.16	-05 22 21.5	~	2208	1
4	NAME Ori Trapezium	OpC	05 35 16.5	-05 23 14	~	1568	1
5	NAME Orion Bright Bar	reg	05 35 22.30	-05 24 33.0	~	821	0
6	2MASS J05352477-0510296	Y*O	05 35 24.777	-05 10 29.61	~	50	1
7	TKK 870	Y*O	05 35 28.19	-05 03 41.2	~	45	0
8	NAME OMC-2/3	reg	05 35 33.0	-05 00 32	~	82	0
9	OMC 4	MoC	05 36 06	-05 35.7	~	65	0
10	NAME Ori A	MoC	05 38	-07.1	~	2899	0
11	NAME Horsehead Nebula	DNe	05 40 59.0	-02 27 30	~	492	0
12	NAME Orion Molecular Cloud	MoC	05 56	-01.8	~	1025	1

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