2015ApJ...798L...1R

Query : 2015ApJ...798L...1R

2015ApJ...798L...1R - Astrophys. J., 798, L1 (2015/January-1)

Collisionally excited filaments in Hubble Space Telescope Hα and Hβ images of HH 1/2.

RAGA A.C., REIPURTH B., CASTELLANOS-RAMIREZ A., CHIANG H.-F. and BALLY J.

Abstract (from CDS):

We present new Hα and Hβ images of the HH 1/2 system, and we find that the Hα/Hβ ratio has high values in ridges along the leading edges of the HH 1 bow shock and of the brighter condensations of HH 2. These ridges have Hα/Hβ = 4 ⟶ 6, which is consistent with collisional excitation from the n = 1 to the n = 3 and 4 levels of hydrogen in a gas of temperatures T = 1.5 ⟶ 10x104 K. This is therefore the first direct evidence that the collisional excitation/ionization region of hydrogen just behind Herbig-Haro shock fronts is detected.

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Journal keyword(s): Herbig-Haro objects - ISM: individual: HH1/2 - ISM: jets and outflows - shock waves - stars: winds, outflows

Simbad objects: 6

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Number of rows : 6
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 34 HH 05 35 31.30 -06 28 43.0     16     ~ 493 2
2 HH 1 HH 05 36 20.8 -06 45 13           ~ 415 1
3 NAME HH 1-2 HH 05 36 22.8 -06 46 03           ~ 209 1
4 HH 2 HH 05 36.4 -06 47           ~ 341 1
5 HH 111 HH 05 51 44.207 +02 48 33.87           ~ 418 0
6 HH 47 HH 08 25 44.30 -51 00 26.2           ~ 247 0

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