Interstellar absorption-line evidence for high-velocity expanding structures in the Carina Nebula foreground

Nolan R. Walborn, Nathan Smith, Ian D. Howarth, Gladys Vieira Kober, Theodore R. Gull, Jon A. Morse

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The extreme, high-velocity interstellar absorption-line profiles toward η Carinae and 16 neighboring stars in Trumpler 16 are examined, including several new sight lines observed in the ultraviolet with the Hubble Space Telescope or in the optical from the Magellan and European Southern Observatories. No two sight lines are identical, but many velocity components are in common. When the velocity scale is shifted to a standard of rest defined by the Carina Nebula emission lines, the symmetries between negative and positive velocities are striking; at least 15 distinct "shells" can be recognized. This circumstance suggests that the complex expanding structures are predominantly in front of the ionizing cluster. There may be a relationship to indications of a supernova remnant in this direction, including a recent Chandra X-Ray Observatory image. Interpretations in terms of high-energy phenomena generated by ongoing star formation possibly on the near side of the giant H II region are also discussed.

Original languageEnglish (US)
Pages (from-to)156-169
Number of pages14
JournalPublications of the Astronomical Society of the Pacific
Volume119
Issue number852
DOIs
StatePublished - Feb 2007
Externally publishedYes

Fingerprint

nebulae
velocity structure
visual perception
observatory
H II regions
supernova remnants
European Southern Observatory
Hubble Space Telescope
symmetry
star formation
observatories
indication
shell
stars
profiles
energy
x rays

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Interstellar absorption-line evidence for high-velocity expanding structures in the Carina Nebula foreground. / Walborn, Nolan R.; Smith, Nathan; Howarth, Ian D.; Kober, Gladys Vieira; Gull, Theodore R.; Morse, Jon A.

In: Publications of the Astronomical Society of the Pacific, Vol. 119, No. 852, 02.2007, p. 156-169.

Research output: Contribution to journalArticle

Walborn, Nolan R. ; Smith, Nathan ; Howarth, Ian D. ; Kober, Gladys Vieira ; Gull, Theodore R. ; Morse, Jon A. / Interstellar absorption-line evidence for high-velocity expanding structures in the Carina Nebula foreground. In: Publications of the Astronomical Society of the Pacific. 2007 ; Vol. 119, No. 852. pp. 156-169.
@article{05a4903a12734ccb891e37175960aa40,
title = "Interstellar absorption-line evidence for high-velocity expanding structures in the Carina Nebula foreground",
abstract = "The extreme, high-velocity interstellar absorption-line profiles toward η Carinae and 16 neighboring stars in Trumpler 16 are examined, including several new sight lines observed in the ultraviolet with the Hubble Space Telescope or in the optical from the Magellan and European Southern Observatories. No two sight lines are identical, but many velocity components are in common. When the velocity scale is shifted to a standard of rest defined by the Carina Nebula emission lines, the symmetries between negative and positive velocities are striking; at least 15 distinct {"}shells{"} can be recognized. This circumstance suggests that the complex expanding structures are predominantly in front of the ionizing cluster. There may be a relationship to indications of a supernova remnant in this direction, including a recent Chandra X-Ray Observatory image. Interpretations in terms of high-energy phenomena generated by ongoing star formation possibly on the near side of the giant H II region are also discussed.",
author = "Walborn, {Nolan R.} and Nathan Smith and Howarth, {Ian D.} and Kober, {Gladys Vieira} and Gull, {Theodore R.} and Morse, {Jon A.}",
year = "2007",
month = "2",
doi = "10.1086/511756",
language = "English (US)",
volume = "119",
pages = "156--169",
journal = "Publications of the Astronomical Society of the Pacific",
issn = "0004-6280",
publisher = "University of Chicago",
number = "852",

}

TY - JOUR

T1 - Interstellar absorption-line evidence for high-velocity expanding structures in the Carina Nebula foreground

AU - Walborn, Nolan R.

AU - Smith, Nathan

AU - Howarth, Ian D.

AU - Kober, Gladys Vieira

AU - Gull, Theodore R.

AU - Morse, Jon A.

PY - 2007/2

Y1 - 2007/2

N2 - The extreme, high-velocity interstellar absorption-line profiles toward η Carinae and 16 neighboring stars in Trumpler 16 are examined, including several new sight lines observed in the ultraviolet with the Hubble Space Telescope or in the optical from the Magellan and European Southern Observatories. No two sight lines are identical, but many velocity components are in common. When the velocity scale is shifted to a standard of rest defined by the Carina Nebula emission lines, the symmetries between negative and positive velocities are striking; at least 15 distinct "shells" can be recognized. This circumstance suggests that the complex expanding structures are predominantly in front of the ionizing cluster. There may be a relationship to indications of a supernova remnant in this direction, including a recent Chandra X-Ray Observatory image. Interpretations in terms of high-energy phenomena generated by ongoing star formation possibly on the near side of the giant H II region are also discussed.

AB - The extreme, high-velocity interstellar absorption-line profiles toward η Carinae and 16 neighboring stars in Trumpler 16 are examined, including several new sight lines observed in the ultraviolet with the Hubble Space Telescope or in the optical from the Magellan and European Southern Observatories. No two sight lines are identical, but many velocity components are in common. When the velocity scale is shifted to a standard of rest defined by the Carina Nebula emission lines, the symmetries between negative and positive velocities are striking; at least 15 distinct "shells" can be recognized. This circumstance suggests that the complex expanding structures are predominantly in front of the ionizing cluster. There may be a relationship to indications of a supernova remnant in this direction, including a recent Chandra X-Ray Observatory image. Interpretations in terms of high-energy phenomena generated by ongoing star formation possibly on the near side of the giant H II region are also discussed.

UR - http://www.scopus.com/inward/record.url?scp=33947579144&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33947579144&partnerID=8YFLogxK

U2 - 10.1086/511756

DO - 10.1086/511756

M3 - Article

VL - 119

SP - 156

EP - 169

JO - Publications of the Astronomical Society of the Pacific

JF - Publications of the Astronomical Society of the Pacific

SN - 0004-6280

IS - 852

ER -