Luminous Stars in the Northern Milky Way. IVa. Identification Charts

Stephenson, C. B.; Nassau, J. J.

doi:10.21236/ad0740972

Cited by 25 publications

(32 citation statements)

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“…Some of these stars were listed in two earlier papers (Parthasarathy & Pottasch 1989;Parthasarathy 1993a). We also found that some of the LS, LSS and LSE stars (Hardrop et al 1959;Stephenson & Sanduleak 1971;Drilling & Bergeron 1995 and references therein) are IRAS sources with far-IR colours similar to PPNe and PNe (Parthasarathy 1993a,b andConlon et al 1993).…”

Section: Selection Criteriasupporting

confidence: 56%

Low resolution spectroscopy of hot post-AGB candidates

Parthasarathy

Vijapurkar

Drilling

2000

Astron. Astrophys. Suppl. Ser.

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Section: Selection Criteriasupporting

confidence: 56%

Low resolution spectroscopy of hot post-AGB candidates

Parthasarathy

Vijapurkar

Drilling

2000

Astron. Astrophys. Suppl. Ser.

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“…In this way, 283 stars for uvby photometry and 225 for Hβ photometry were included. 77 stars in the final sample are intrinsically luminous stars (Stephenson & Sanduleak 1971).…”

Section: Observations and Reductionsmentioning

confidence: 99%

Strömgren and Hβ photometry of O and B type stars in star-forming regions

Kaltcheva

Olsen²,

Clausen³

2000

Astron. Astrophys. Suppl. Ser.

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Abstract. Strömgren and Hβ photometry of O and B type stars, generally brighter than 9.5 mag is reported for the field of the Carina Spiral Feature. The observations are based on the PPM catalogue identifications and are designed to improve the completeness of the existing uvbyβ data for the bright early-type stars in the field. We present new uvby photometry for 283 stars and Hβ photometry for 225 of them. These observations are part of an ongoing effort to study the structure of selected star-forming regions in the Milky Way by means of uvbyβ photometry. A comparison of the new data to other uvbyβ data sets for this field is presented.

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“…KV Vel: Listed as luminous star in the list of Stephenson & Sanduleak (1971), planetary nebula nature suggested by Holmberg et al (1978), spectroscopically identified as sdO star…”

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confidence: 99%

The age, life expectancy, and space density of Post Common Envelope Binaries

Schreiber

Gänsicke

2003

A&A

180

242

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Abstract. We present a sample of 30 well observed Post Common Envelope Binaries (PCEBs). Deriving the cooling age of the white dwarfs, we show that the PCEB population is dominated by young systems. Having calculated the orbital evolution of the systems under the assumption of two different prescriptions for the angular momentum loss, we find that most of the systems have not yet completed a significant fraction of their PCEB life time. We therefore predict the existence of a large population of old PCEBs containing cold white dwarfs (T eff < ∼ 15 000 K). Our calculations show that nearly half of the PCEBs in our sample will evolve into a semi-detached configuration and start mass transfer in less than the Hubble-time. These systems are thus representative for progenitors of the current CV population. Only one of them (V471 Tau) will evolve into a long-period (P orb > ∼ 4 h) CV, and a significant fraction of the systems will start mass transfer in the period gap. Having estimated the distances of the PCEBs in the sample, we derive a space density of ρ PCEB ∼ 6−30 × 10 −6 pc −3 , depending on the assumed angular momentum loss prescription. Taking into account the evolutionary time scales we compute a lower limit for the CV space density, predicted by the currently known PCEB population of ρ CV > ∼ 10 −5 pc −3 . Finally, we discuss possible observational selection effects and conclude that the observed PCEB population is probably highly incomplete.

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Luminous Stars in the Northern Milky Way. IVa. Identification Charts

Cited by 25 publications

References 0 publications

Low resolution spectroscopy of hot post-AGB candidates

Low resolution spectroscopy of hot post-AGB candidates

Strömgren and Hβ photometry of O and B type stars in star-forming regions

The age, life expectancy, and space density of Post Common Envelope Binaries

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