Spectroscopic Survey of Planetary Nebulae

Acker, A.; Köppen, J.; Stenholm, B.

doi:10.1007/978-94-009-0865-9_9

Cited by 68 publications

(98 citation statements)

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“…The object was originally included in the catalogue of planetary nebulae (PNe) by Kohoutek (1965) with name PN K3-12. However, it was suspected to be a symbiotic star by Acker & Stenholm (1990). Our spectrum confirms its symbiotic nature, revealed by the emission line spectrum combined with strong 6825 and IPHASJ185323.58+084955.1 (Fig.…”

Section: New Iphas Symbiotic Starssupporting

confidence: 80%

IPHAS and the symbiotic stars

Corradi

Valentini

Munari

et al. 2009

A&A

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Context. Knowledge of the total population of symbiotic stars in the Galaxy is important for understanding basic aspects of stellar evolution in interacting binaries and the relevance of this class of objects in the formation of supernovae of type Ia. Aims. In a previous paper, we presented the selection criteria needed to search for symbiotic stars in IPHAS, the INT Hα survey of the Northern Galactic plane. IPHAS gives us the opportunity to make a systematic, complete search for symbiotic stars in a magnitude-limited volume. Methods. Follow-up spectroscopy at different telescopes worldwide of a sample of sixty two symbiotic star candidates is presented. Results. Seven out of nineteen S-type candidates observed spectroscopically are confirmed to be genuine symbiotic stars. The spectral type of their red giant components, as well as reddening and distance, were computed by modelling the spectra. Only one new D-type symbiotic system, out of forty-three candidates observed, was found. This was as expected (see discussion in our paper on the selection criteria). The object shows evidence for a high density outflow expanding at a speed ≥65 km s −1 . Most of the other candidates are lightly reddened classical T Tauri stars and more highly reddened young stellar objects that may be either more massive young stars of HAeBe type or classical Be stars. In addition, a few notable objects have been found, such as three new Wolf-Rayet stars and two relatively high-luminosity evolved massive stars. We also found a helium-rich source, possibly a dense ejecta hiding a WR star, which is surrounded by a large ionized nebula. Conclusions. These spectroscopic data allow us to refine the selection criteria for symbiotic stars in the IPHAS survey and, more generally, to better understand the behaviour of different Hα emitters in the IPHAS and 2MASS colour-colour diagrams.

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Section: New Iphas Symbiotic Starssupporting

confidence: 80%

IPHAS and the symbiotic stars

Corradi

Valentini

Munari

et al. 2009

A&A

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“…Therefore these observations resolve the previous uncertainty about the nature of K 3-22: the source was included in the list of true or probable planetary nebulae (PNe) in the Strasbourg-ESO catalogue but with the note "possibly an H ii region" (Acker et al 1992), classified as a possible planetary nebula (Kohoutek 2001), or considered as an object of uncertain nature (Acker et al 1987). …”

Section: A Symbiotic Star's Spectrummentioning

confidence: 81%

K 3–22: a D-type symbiotic star

Corradi

Giammanco

2010

A&A

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A goal of the IPHAS survey is to determine the frequency and nature of emission-line sources in the Galactic plane. According to our selection criteria, K 3-22 is a candidate symbiotic star, but it was previously classified as a planetary nebula. To determine its nature, we acquired a low-resolution optical spectrum of K 3-22. Our analysis of our spectroscopy demonstrates that K 3-22 is indeed a D-type symbiotic star, because of its high excitation nebular spectrum and the simultaneous presence of Raman-scattered O vi emission at 6825 Å and 7082 Å, which is detected primarily in symbiotic stars.

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“…In [3] and [39] there are notes that in [19] this object is classified as symbiotic, but this is not true and in [19] there are only IR colours for V850 Aql. s28=Hen 2−442 Suspected in [323]: TiO bands probably present, suggesting cool component [25,323] and optical emission-line spectrum: H i, He i and other lines with ionization potential up to 100 eV.…”

Section: =R Aqrmentioning

confidence: 99%

“…115=SS73 117 IRAS data from [142]. 116=AS 269 This is a yellow symbiotic star, cool component is G-K giant [198,3]. In the optical spectrum there are emission lines with ionization potential up to 54.4 eV [130].…”

Section: =As 245mentioning

confidence: 99%

“…We agree with this classification although this object might be a single pulsating star: (i) the carbon star might pulsate with period of 342 days [57] and then emission lines behave as for a Mira variable -they disappear near minimum light and show up again at maximum (see spectra in [229]); (ii) H α is very narrow: 2Å (90 km s −1 ) and for a symbiotic star we would expect a width of about 300−500 km s −1 ; (iii) the Balmer decrement is different than that observed for symbiotic stars (it resembles that of Mira variable), although the authors of [229] claim that the Balmer decrement resembles that of a symbiotic star. s27=V850 Aql Probable presence of Mira [39,147] or latetype star [3] in the centre of planetary nebula PK 037−6 2 (see note in [147]) with emission-line spectrum (H i lines).…”

Section: =R Aqrmentioning

confidence: 99%

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A catalogue of symbiotic stars

Belczyński

Mikołajewska

Munari

et al. 2000

Astron. Astrophys. Suppl. Ser.

376

407

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Abstract. We present a new catalogue of symbiotic stars. In our list we include 188 symbiotic stars as well as 30 objects suspected of being symbiotic. For each star, we present basic observational material: coordinates, V and K magnitudes, ultraviolet (UV), infrared (IR), X-ray and radio observations. We also list the spectral type of the cool component, the maximum ionization potential observed, references to finding charts, spectra, classifications and recent papers discussing the physical parameters and nature of each object. Moreover, we present the orbital photometric ephemerides and orbital elements of known symbiotic binaries, pulsational periods for symbiotic Miras, Hipparcos parallaxes and information about outbursts and flickering.

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Spectroscopic Survey of Planetary Nebulae

Cited by 68 publications

References 0 publications

IPHAS and the symbiotic stars

IPHAS and the symbiotic stars

K 3–22: a D-type symbiotic star

A catalogue of symbiotic stars

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