A far-ultraviolet atlas of symbiotic stars observed with IUE. 1. The SWP range

Meier, Steven R.; Kafatos, Menas; Fahey, R. P.; Michalitsianos, A. G.

doi:10.1086/192078

Cited by 18 publications

(18 citation statements)

References 17 publications

(19 reference statements)

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“…The LWR spectrum of RT Ser, taken in 1982, has been reprocessed using the most current IUE SIPS (IUE Signal Image Processing System) data calibration and extraction procedures. Because of the large number of IUE spectra of symbiotic novae already present in the literature (e.g., Murset et al 1991 ;Vogel & Nussbaumer 1992 ;MN ;Meier et al 1994), we show only those of RT Ser and PU VulÈRT Ser because, to our knowledge, the UV spectra have not been published previously, and PU Vul because its spectrum was still evolving at the time of our observations. These data are shown in Figures 2a, 2b and 6a and 6b ; respectively.…”

Section: Observationsmentioning

confidence: 93%

“…Largely because of the International Ultraviolet Explorer satellite (IUE), numerous measurements exist that allow one to follow the UV spectral development (Meier et al 1994, and references therein), but the number of corresponding infrared studies is sparse. In this paper we present infrared spectrophotometry in the wavelength region 0.9È1.3 km for many of the known symbiotic novae.…”

Section: Introductionmentioning

confidence: 99%

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Near‐Infrared and Ultraviolet Spectrophotometry of Symbiotic Novae

Rudy¹,

Meier²,

Rossano³

et al. 1999

ASTROPHYS J SUPPL S

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In this paper we present an atlas of near-infrared spectrophotometry of symbiotic novae and report results from nearly contemporaneous IUE observations. The data cover RT Ser, AG Peg, V1016 Cyg, V1329 Cyg, HM Sge, and Pu Vul, most of the known symbiotic novae that are observable from the northern hemisphere. Emission-line strengths for both spectral regions are tabulated. Extinction values are derived from He II j1640 in the UV and He II j10124 in the infrared. Spectral types are determined for the cool giant component using infrared absorption features. The extinction and apparent J (1.25 km) magnitude measured from the spectrophotometry are combined with the known relation between spectral type and absolute magnitude to derive distances for each system.

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Section: Observationsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Near‐Infrared and Ultraviolet Spectrophotometry of Symbiotic Novae

Rudy¹,

Meier²,

Rossano³

et al. 1999

ASTROPHYS J SUPPL S

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“…Coordinates taken from [96] -SIMBAD coordinates are not correct. 138=V4074 Sgr IUE observations reported in [187]. 139=V2905 Sgr IRAS data from [92].…”

Section: =H 2−38mentioning

confidence: 99%

“…[198,237] (optical spectra), [303,111] (emission line profiles and radial velocity measurements) [233] (optical and IR photometry), [142,315] (IRAS observations), [280,279,278,112,117] (radio emission), [116,274] (searches for maser emission), [187] (IUE observations), [35,238] (X-ray emission), [312] (symbiotic miras), [235] (symbiotic novae), [236,215] (extragalactic symbiotics) and in-depth investigations, e.g. [109,205,110,287,83] for AX Per alone.…”

Section: Introductionmentioning

confidence: 99%

A catalogue of symbiotic stars

Belczyński

Mikołajewska

Munari

et al. 2000

Astron. Astrophys. Suppl. Ser.

378

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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“…The emission-line spectra have contributions from the surrounding nebulae, the red giant and parts of the red giant atmosphere heated by the white dwarf radiation. The electron densities in symbiotic nebulae range from 10 6 to 10 11 cm −3 (Meier et al 1994), and are considerably larger than those measured in PNe (Stanghellini & Kaler 1989). Gradients in electron temperatures must be large in symbiotic stars to explain the wide range of ionization states.…”

Section: Introductionmentioning

confidence: 89%

Modeling of C IV pumped fluorescence of Fe II in symbiotic stars

Eriksson

Nilsson

Veenhuizen³

et al. 2007

A&A

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Aims. We describe how the C iv λ1548.18 line pumps the 1548.20 and 1548.41 Å channels of Fe ii in symbiotic stars through the process known as photo-ionization by accidental resonance (PAR). We describe where and why Fe ii fluorescence arises in symbiotic stars and whether the Fe ii λ1548.41 channel can only be activated when there is a white-dwarf wind present in the system. Further, we aim to show how an analysis of the PAR-pumped lines helps to understand the phyisical conditions that they manifest.Methods. We calculate intensities of the C iv-pumped Fe ii fluorescence lines in symbiotic stars, corresponding to the y 4 H 11/2 and w 2 D 3/2 levels, based on a simple geometrical model of the emitting regions. We apply the model to seven symbiotic stars, known to have Fe ii fluorescence lines pumped by C iv in their spectra. We compare the predicted intensities to the observed intensities of the selected symbiotic stars. Results. We find that we can reproduce the observed fluorescence intensities of the seven symbiotic stars in our sample, using parameters that are consistent with their known properties. We show that PAR-produced lines can be used as a diagnostic tool to derive important physical parameters of a stellar system. We suggest that the detection of Fe ii lines corresponding to the w 2 D 3/2 level in certain symbiotic stars provide evidence of hot shells expanding with velocities of at least hundreds km s −1 in those systems.

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A far-ultraviolet atlas of symbiotic stars observed with IUE. 1. The SWP range

Cited by 18 publications

References 17 publications

Near‐Infrared and Ultraviolet Spectrophotometry of Symbiotic Novae

Near‐Infrared and Ultraviolet Spectrophotometry of Symbiotic Novae

A catalogue of symbiotic stars

Modeling of C IV pumped fluorescence of Fe II in symbiotic stars

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