Two circumstellar nebulae discovered with the Wide-field Infrared Survey Explorer and their massive central stars
arXiv:1812.00007 · doi:10.3847/1538-3881/aaf56c
Abstract
We report the discovery of two mid-infrared nebulae in the northern hemisphere with the Wide-field Infrared Survey Explorer and the results of optical spectroscopy of their central stars, BD+60 2668 (composed of two components, separated from each other by \approx 3 arcsec) and ALS 19653, with the Calar Alto 3.5-m telescope and the Southern African Large Telescope (SALT), respectively. We classify the components of BD+60 2668 as stars of spectral types B0.5 II and B1.5 III. ALS 19653 is indicated in the SIMBAD data base as a planetary nebula, while our observations show that it is a massive B0.5 Ib star, possibly in a binary system. Using the stellar atmosphere code FASTWIND, we derived fundamental parameters of the three stars as well as their surface element abundances, implying that all of them are either on the main sequence or only recently left it. This provides further evidence that massive stars can produce circumstellar nebulae while they are still relatively unevolved. We also report the detection of optical counterparts to the mid-infrared nebulae and a second, more extended optical nebula around ALS 19653, and present the results of SALT spectroscopy of both nebulae associated with this star. The possible origin of the nebulae is discussed.
arXiv comment24 pages, 13 figures, 6 tables, accepted for publication in AJ
References in corpus (55)
- Gaia Data Release 2. Summary of the contents and survey properties
- The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
- Binary interaction dominates the evolution of massive stars
- Pre-Supernova Evolution of Massive Single and Binary Stars
- Rotating Massive Main-Sequence Stars I: Grids of Evolutionary Models and Isochrones
- The MUSE second-generation VLT instrument
- Present-day cosmic abundances. A comprehensive study of nearby early B-type stars and implications for stellar and Galactic evolution and interstellar dust models
- Atmospheric NLTE-Models for the Spectroscopic Analysis of Blue Stars with Winds. II. Line-Blanketed Models
- ULySS: A Full Spectrum Fitting Package
- The incidence of stellar mergers and mass gainers among massive stars
- A spectroscopic survey on the multiplicity of high-mass stars
- The Origin and Shaping of Planetary Nebulae: Putting the Binary Hypothesis to the Test
- The IACOB project: I. Rotational velocities in Northern Galactic O and early B-type stars revisited. The impact of other sources of line-broadening
- Low-Mass Binary Induced Outflows from Asymptotic Giant Branch Stars
- Formation of the Widest Binaries from Dynamical Unfolding of Triple Systems
- First science with SALT: peering at the accreting polar caps of the eclipsing polar SDSS J015543.40+002807.2
- Viscous Effects on the Interaction between the Coplanar Decretion Disc and the Neutron Star in Be/X-Ray Binaries
- The atmospheric parameters and spectral interpolator for the stars of MILES
- Strong Emission Line HII Galaxies in the Sloan Digital Sky Survey. I. Catalog of DR1 Objects with Oxygen Abundances from Te easurements
- Fourier method in the determination of rotational velocities in OB stars
- Luminous Blue Variables and superluminous supernovae from binary mergers
- A 2dF survey of the Small Magellanic Cloud
- Rejuvenation of stellar mergers and the origin of magnetic fields in massive stars
- HASH: the Hong Kong/AAO/Strasbourg H-alpha planetary nebula database
- A Hidden Population of Massive Stars with Circumstellar Shells Discovered with the Spitzer Space Telescope
- The Most Magnetic Stars
- Early Results from the Galactic O-Star Spectroscopic Survey: C III Emission Lines in Of Spectra
- MN48: a new Galactic bona fide luminous blue variable revealed by Spitzer and SALT
- Revealing evolved massive stars with Spitzer
- Chemical composition and origin of nebulae around Luminous Blue Variables
- Nitrogen line spectroscopy in O-stars -- III. The earliest O-stars
- The metallicity extremes of the Sagittarius dSph using SALT spectroscopy of PNe
- Spectroscopic determination of the fundamental parameters of 66 B-type stars in the field-of-view of the CoRoT satellite
- Interacting supernovae from photoionization-confined shells around red supergiant stars
- The ARAUCARIA project: Grid-Based Quantitative Spectroscopic Study of Massive Blue Stars in NGC55
- A Catalog of MIPSGAL Disk and Ring Sources
- Was the nineteenth century giant eruption of Eta Carinae a merger event in a triple system?
- The evolutionary status of Sher25 - implications for blue supergiants and the progenitor of SN1987A
- Fast & slow winds from supergiants and Luminous Blue Variables
- The Ring Nebula Around the Blue Supergiant SBW1: Pre-Explosion Snapshot of a SN 1987A Twin
- Discovery of a new Wolf-Rayet star and its ring nebula in Cygnus
- R4 and its circumstellar nebula: evidence for a binary merger?
- Discovery of a parsec-scale bipolar nebula around MWC 349A
- Discovery of two new Galactic candidate luminous blue variables with WISE
- The blue supergiant Sher 25 and its intriguing hourglass nebula
- Palomar/TripleSpec observations of {\it Spitzer}/MIPSGAL~24\mic\ circumstellar shells: unveiling the nature of their central sources
- The alignment of the polarization of HAe/Be stars with the interstellar magnetic field
- Global Disk Oscillations in Binary Be Stars
- Luminous blue variables: An imaging perspective on their binarity and near environment
- The blue supergiant MN18 and its bipolar circumstellar nebula
- TYC 3159-6-1: a runaway blue supergiant
- Optical spectroscopy of the blue supergiant Sk-69 279 and its circumstellar shell with SALT
- WS1: one more new Galactic bona fide luminous blue variable
- MN112: a new Galactic candidate Luminous Blue Variable
- Tracing back the evolution of the candidate LBV HD168625