Infrared recombination lines of hydrogen from young objects in the southern Galactic plane

Sara C. Beck; Jacqueline Fischer; Howard A. Smith

doi:10.1086/170791

Infrared recombination lines of hydrogen from young objects in the southern Galactic plane

Sara C. Beck^*, Jacqueline Fischer, Howard A. Smith

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

We have observed near infrared recombination lines of hydrogen in twelve young objects in the southern Galactic plane. The sample includes Herbig-Haro objects and IRAS dark cloud point sources from the 1987 catalog of Persson and Campbell. In four of the IRAS sources we have measured two or three infrared lines, and their intensity ratios are consistent with models of optically thick ionized winds. The intrinsic line shapes, which we retrieve from maximum entropy deconvolutions, indicate gas velocities of 100 km s^-1 or more as expected from ionized winds. These sources are apparently embedded pre-main-sequence objects with outflows. They include some of the brightest known YSOs.

Original language	English
Pages (from-to)	336-343
Number of pages	8
Journal	Astrophysical Journal
Volume	383
Issue number	1
DOIs	https://doi.org/10.1086/170791
State	Published - 10 Dec 1991

Keywords

Infrared spectra
Infrared: sources
Stars: pre-main-sequence
Stars: winds

Access to Document

10.1086/170791

Cite this

@article{205389cd34bc4eb696bbd4f8a4394327,

title = "Infrared recombination lines of hydrogen from young objects in the southern Galactic plane",

abstract = "We have observed near infrared recombination lines of hydrogen in twelve young objects in the southern Galactic plane. The sample includes Herbig-Haro objects and IRAS dark cloud point sources from the 1987 catalog of Persson and Campbell. In four of the IRAS sources we have measured two or three infrared lines, and their intensity ratios are consistent with models of optically thick ionized winds. The intrinsic line shapes, which we retrieve from maximum entropy deconvolutions, indicate gas velocities of 100 km s-1 or more as expected from ionized winds. These sources are apparently embedded pre-main-sequence objects with outflows. They include some of the brightest known YSOs.",

keywords = "Infrared spectra, Infrared: sources, Stars: pre-main-sequence, Stars: winds",

author = "Beck, {Sara C.} and Jacqueline Fischer and Smith, {Howard A.}",

year = "1991",

month = dec,

day = "10",

doi = "10.1086/170791",

language = "אנגלית",

volume = "383",

pages = "336--343",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1",

}

TY - JOUR

T1 - Infrared recombination lines of hydrogen from young objects in the southern Galactic plane

AU - Beck, Sara C.

AU - Fischer, Jacqueline

AU - Smith, Howard A.

PY - 1991/12/10

Y1 - 1991/12/10

N2 - We have observed near infrared recombination lines of hydrogen in twelve young objects in the southern Galactic plane. The sample includes Herbig-Haro objects and IRAS dark cloud point sources from the 1987 catalog of Persson and Campbell. In four of the IRAS sources we have measured two or three infrared lines, and their intensity ratios are consistent with models of optically thick ionized winds. The intrinsic line shapes, which we retrieve from maximum entropy deconvolutions, indicate gas velocities of 100 km s-1 or more as expected from ionized winds. These sources are apparently embedded pre-main-sequence objects with outflows. They include some of the brightest known YSOs.

AB - We have observed near infrared recombination lines of hydrogen in twelve young objects in the southern Galactic plane. The sample includes Herbig-Haro objects and IRAS dark cloud point sources from the 1987 catalog of Persson and Campbell. In four of the IRAS sources we have measured two or three infrared lines, and their intensity ratios are consistent with models of optically thick ionized winds. The intrinsic line shapes, which we retrieve from maximum entropy deconvolutions, indicate gas velocities of 100 km s-1 or more as expected from ionized winds. These sources are apparently embedded pre-main-sequence objects with outflows. They include some of the brightest known YSOs.

KW - Infrared spectra

KW - Infrared: sources

KW - Stars: pre-main-sequence

KW - Stars: winds

UR - http://www.scopus.com/inward/record.url?scp=0039817459&partnerID=8YFLogxK

U2 - 10.1086/170791

DO - 10.1086/170791

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

AN - SCOPUS:0039817459

SN - 0004-637X

VL - 383

SP - 336

EP - 343

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

ER -

Infrared recombination lines of hydrogen from young objects in the southern Galactic plane

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this