Five WC9 stars discovered in the AAO/UKST H alpha survey

EC Hopewell; MJ Barlow; JE Drew; YC Unruh; QA Parker; MJ Pierce; PA Crowther; C Knigge; S Phillipps; AA Zijlstra

doi:10.1111/j.1365-2966.2005.09487.x

Five WC9 stars discovered in the AAO/UKST H alpha survey

EC Hopewell^*, MJ Barlow, JE Drew, YC Unruh, QA Parker, MJ Pierce, PA Crowther, C Knigge, S Phillipps, AA Zijlstra

^*Corresponding author for this work

School of Physics

Research output: Contribution to journal › Article (Academic Journal) › peer-review

11 Citations (Scopus)

Abstract

We report the discovery of five massive Wolf-Rayet (WR) stars resulting from a programme of follow-up spectroscopy of candidate emission-line stars in the Anglo-Australian Observatory United Kingdom Schmidt Telescope (AAO/UKST) Southern Galactic Plane H alpha survey. The 6195-6775 angstrom spectra of the stars are presented and discussed. A WC9 class is assigned to all five stars through comparison of their spectra with those of known late-type WC stars, bringing the known total number of Galactic WC9 stars to 44. Whilst three of the five WC9 stars exhibit near-infrared (NIR) excesses characteristic of hot dust emission (as seen in the great majority of known WC9 stars), we find that two of the stars show no discernible evidence of such excesses. This increases the number of known WC9 stars without NIR excesses to seven. Reddenings and distances for all five stars are estimated.

Translated title of the contribution	Five WC9 stars discovered in the AAO/UKST H Alpha survey
Original language	English
Pages (from-to)	857-866
Number of pages	10
Journal	Monthly Notices of the Royal Astronomical Society
Volume	363
Issue number	3
DOIs	https://doi.org/10.1111/j.1365-2966.2005.09487.x
Publication status	Published - 1 Nov 2005

Bibliographical note

Publisher: Blackwell Publishing

Keywords

surveys
circumstellar matter
stars : Wolf-Rayet
Galaxy : stellar content
WOLF-RAYET STARS
CLUSTER WESTERLUND-1
MASSIVE STARS
INNER GALAXY
POPULATION
CATALOG
SEARCH
EVOLUTION
EMISSION
SPECTROSCOPY

Access to Document

10.1111/j.1365-2966.2005.09487.x

Handle.net

Persistent link

Cite this

@article{0ee032fbd85a4827980d7086e564752b,

title = "Five WC9 stars discovered in the AAO/UKST H alpha survey",

abstract = "We report the discovery of five massive Wolf-Rayet (WR) stars resulting from a programme of follow-up spectroscopy of candidate emission-line stars in the Anglo-Australian Observatory United Kingdom Schmidt Telescope (AAO/UKST) Southern Galactic Plane H alpha survey. The 6195-6775 angstrom spectra of the stars are presented and discussed. A WC9 class is assigned to all five stars through comparison of their spectra with those of known late-type WC stars, bringing the known total number of Galactic WC9 stars to 44. Whilst three of the five WC9 stars exhibit near-infrared (NIR) excesses characteristic of hot dust emission (as seen in the great majority of known WC9 stars), we find that two of the stars show no discernible evidence of such excesses. This increases the number of known WC9 stars without NIR excesses to seven. Reddenings and distances for all five stars are estimated.",

keywords = "surveys, circumstellar matter, stars : Wolf-Rayet, Galaxy : stellar content, WOLF-RAYET STARS, CLUSTER WESTERLUND-1, MASSIVE STARS, INNER GALAXY, POPULATION, CATALOG, SEARCH, EVOLUTION, EMISSION, SPECTROSCOPY",

author = "EC Hopewell and MJ Barlow and JE Drew and YC Unruh and QA Parker and MJ Pierce and PA Crowther and C Knigge and S Phillipps and AA Zijlstra",

note = "Publisher: Blackwell Publishing",

year = "2005",

month = nov,

day = "1",

doi = "10.1111/j.1365-2966.2005.09487.x",

language = "English",

volume = "363",

pages = "857--866",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "1365-2966",

publisher = "Oxford University Press",

number = "3",

}

TY - JOUR

T1 - Five WC9 stars discovered in the AAO/UKST H alpha survey

AU - Hopewell, EC

AU - Barlow, MJ

AU - Drew, JE

AU - Unruh, YC

AU - Parker, QA

AU - Pierce, MJ

AU - Crowther, PA

AU - Knigge, C

AU - Phillipps, S

AU - Zijlstra, AA

N1 - Publisher: Blackwell Publishing

PY - 2005/11/1

Y1 - 2005/11/1

N2 - We report the discovery of five massive Wolf-Rayet (WR) stars resulting from a programme of follow-up spectroscopy of candidate emission-line stars in the Anglo-Australian Observatory United Kingdom Schmidt Telescope (AAO/UKST) Southern Galactic Plane H alpha survey. The 6195-6775 angstrom spectra of the stars are presented and discussed. A WC9 class is assigned to all five stars through comparison of their spectra with those of known late-type WC stars, bringing the known total number of Galactic WC9 stars to 44. Whilst three of the five WC9 stars exhibit near-infrared (NIR) excesses characteristic of hot dust emission (as seen in the great majority of known WC9 stars), we find that two of the stars show no discernible evidence of such excesses. This increases the number of known WC9 stars without NIR excesses to seven. Reddenings and distances for all five stars are estimated.

AB - We report the discovery of five massive Wolf-Rayet (WR) stars resulting from a programme of follow-up spectroscopy of candidate emission-line stars in the Anglo-Australian Observatory United Kingdom Schmidt Telescope (AAO/UKST) Southern Galactic Plane H alpha survey. The 6195-6775 angstrom spectra of the stars are presented and discussed. A WC9 class is assigned to all five stars through comparison of their spectra with those of known late-type WC stars, bringing the known total number of Galactic WC9 stars to 44. Whilst three of the five WC9 stars exhibit near-infrared (NIR) excesses characteristic of hot dust emission (as seen in the great majority of known WC9 stars), we find that two of the stars show no discernible evidence of such excesses. This increases the number of known WC9 stars without NIR excesses to seven. Reddenings and distances for all five stars are estimated.

KW - surveys

KW - circumstellar matter

KW - stars : Wolf-Rayet

KW - Galaxy : stellar content

KW - WOLF-RAYET STARS

KW - CLUSTER WESTERLUND-1

KW - MASSIVE STARS

KW - INNER GALAXY

KW - POPULATION

KW - CATALOG

KW - SEARCH

KW - EVOLUTION

KW - EMISSION

KW - SPECTROSCOPY

U2 - 10.1111/j.1365-2966.2005.09487.x

DO - 10.1111/j.1365-2966.2005.09487.x

M3 - Article (Academic Journal)

SN - 1365-2966

VL - 363

SP - 857

EP - 866

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

Five WC9 stars discovered in the AAO/UKST H alpha survey

Abstract

Bibliographical note

Keywords

Access to Document

Handle.net

Fingerprint

Cite this