The Case low-dispersion northern sky survey. VII - Late-type stars

Sanduleak, N.; Pesch, Peter

doi:10.1086/191262

Cited by 30 publications

(27 citation statements)

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“…This is the star CLS 100, identified as an M dwarf by Sanduleak & Pesch (1988) in an objective-prism survey. Very little information exists on this object.…”

Section: Lsr 1615+3151mentioning

confidence: 99%

New High Proper Motion Stars from the Digitized Sky Survey. II. Northern Stars with 0."5 yr^-1< < 2."0 yr^-1at High Galactic Latitudes

2003

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In a continuation of our systematic search for high proper motion stars in the Digitized Sky Survey, we have completed the analysis of northern sky fields at Galactic latitudes above 25 . With the help of our SUPERBLINK software, a powerful automated blink comparator developed by us, we have identified 1146 stars in the magnitude range 8 < r < 20 with proper motions 0>500 yr À1 < l < 2>000 yr À1 . These include 1080 stars previously listed in Luyten's proper-motion catalogs (the Luyten Half-Second catalog and the New Luyten Two-Tenths catalog), nine stars not previously listed in the Luyten catalogs but reported elsewhere in the literature (including one previously reported by our team), and 57 new objects reported here for the first time. This paper includes a list of positions, proper motions, magnitudes, and finder charts for all the new high proper motion stars. Combined with our previous study of low Galactic latitude fields (see Paper I), our survey now covers over 98% of the northern sky. We conclude that the Luyten catalogs were '90% complete in the northern sky for stars with 0>5 < l < 2>0 down to magnitude r ¼ 19. We discuss the incompleteness of the old Luyten proper-motion survey and estimate completeness limits for our new survey.

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“…This is the star CLS 100, identified as an M dwarf by Sanduleak & Pesch (1988) in an objective-prism survey. Very little information exists on this object.…”

Section: Lsr 1615+3151mentioning

confidence: 99%

New High Proper Motion Stars from the Digitized Sky Survey. II. Northern Stars with 0."5 yr^-1< < 2."0 yr^-1at High Galactic Latitudes

2003

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“…Most of the known FHLC stars were originally selected from two objective-prism surveys, the Case Low Dispersion northern sky survey (Sanduleak & Pesch 1988) and the University of Michigan Thin Prism survey (MacAlpine & Lewis 1978;Bothun et al 1991). The Case survey covered :1000 deg 2 of the NGC, and the University of Michigan survey covered :225 deg 2 of the SGC.…”

Section: P R E V I O U S S U Rv E Y Smentioning

confidence: 99%

The APM survey for cool carbon stars in the Galactic halo -- I

Totten

Irwin

1998

Monthly Notices of the Royal Astronomical Society

123

141

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A B S T R A C TA by-product of the APM high-redshift quasar survey was the discovery of several distant (20-100 kpc) N-type carbon stars at high galactic latitude. Following on from this, we have started a systematic all-sky survey at galactic latitudes "b"30° to find further examples of these rare objects, and we report here on the results from the first season of follow-up spectroscopy. Faint, high-latitude carbon (FHLC) giants make excellent probes of the kinematic structure of the outer Galactic halo. Therefore, in addition to detailed spectrophotometry covering a wide wavelength range, we have obtained high-resolution (#1 Å) spectra centred on the CN bands at #8000 Å, and have derived accurate ( 10 km s 21 ) radial velocities for the known FHLC stars. From the initial phase of our survey covering :6500 deg 2 , we find a surface density of faint N-type carbon stars in the halo of :1 per 200 deg 2 , roughly a factor of 4 less than the surface density of CH-type carbon stars in the halo. Intermediate-age, N-type carbon stars seem unlikely to have formed in the halo in isolation from other star-forming regions, and one possibility that we are investigating is that they either arise from the disruption of tidally captured dwarf satellite galaxies or are a manifestation of the long-sought optical component of the Magellanic Stream.

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“…Previous surveys have been carefully reviewed by TI98: they are mainly the Case low-dispersion Survey covering ≈1000 deg 2 of the North Galactic Cap (Sanduleak & Pesch 1988) Bothun et al 1991), as well as the deep CCD survey for faint high-latitude carbon (FHLC) stars by Green et al (1994) although this resulted in the discovery of only one carbon-rich star in the 52 deg 2 area searched. More recently, a major improvement in this domain was achieved by the APM Carbon Star Survey (TI98) which covers ≈7000 deg 2 .…”

Section: Introductionmentioning

confidence: 99%

A search for faint galactic carbon stars from the First Byurakan Spectral Sky Survey. I.

Gigoyan

Mauron

Azzopardi³

et al. 2001

A&A

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Abstract. We present and analyse in this paper the first results of a systematic search for Galactic carbon (C) stars using the First Byurakan Spectral Sky Survey (FBS). The present surveyed area extends over ∼6140 deg 2 on the sky corresponding to ∼1/3 of the complete FBS Survey. Accurate positions, spectral classifications, approximate B and R magnitudes, and finding charts are provided for 35 objects. Identification and spectral subclasses (R or N) of those stars, belonging to the magnitude range 10.5 ≤ R ≤ 16.4, were determined by scrutinizing the Byurakan Schmidt telescope objective-prism plates. Subsequent slit-spectroscopic observations were obtained by us for 21 stars, confirming the carbon nature of them all. From this result, it is assumed that the remaining C star candidates are most likely carbon-rich stars as well. 18 of the listed objects at a Galactic latitude (|b| > 30• ) are faint enough (R > 11.0) to be considered as Faint High Latitude Carbon (FHLC) stars according to the definition of Totten & Irwin (1998). JHK magnitudes for 23 objects of our list are provided by the 2MASS database. Approximate distances are estimated from R and/or JHK data. Most of the stars are located between d 7 and d 25 kpc from the Sun while their distances z to the Galactic plane range from about 2 to 25 kpc. The most distant object of our sample is found at d 45 kpc and z 40 kpc. It is interesting to note that the rate of newly discovered FBS FHLC stars -one object per 200 deg 2 -is comparable to that achieved by other previous surveys. Consequently it is reasonable to expect that the full exploitation of the FBS plates might result in the identification of about 45 new FHLC stars.

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The Case low-dispersion northern sky survey. VII - Late-type stars

Cited by 30 publications

References 1 publication

New High Proper Motion Stars from the Digitized Sky Survey. II. Northern Stars with 0."5 yr^-1< < 2."0 yr^-1at High Galactic Latitudes

New High Proper Motion Stars from the Digitized Sky Survey. II. Northern Stars with 0."5 yr^-1< < 2."0 yr^-1at High Galactic Latitudes

The APM survey for cool carbon stars in the Galactic halo -- I

A search for faint galactic carbon stars from the First Byurakan Spectral Sky Survey. I.

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The Case low-dispersion northern sky survey. VII - Late-type stars

Cited by 30 publications

References 1 publication

New High Proper Motion Stars from the Digitized Sky Survey. II. Northern Stars with 0."5 yr-1< < 2."0 yr-1at High Galactic Latitudes

New High Proper Motion Stars from the Digitized Sky Survey. II. Northern Stars with 0."5 yr-1< < 2."0 yr-1at High Galactic Latitudes

The APM survey for cool carbon stars in the Galactic halo -- I

A search for faint galactic carbon stars from the First Byurakan Spectral Sky Survey. I.

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New High Proper Motion Stars from the Digitized Sky Survey. II. Northern Stars with 0."5 yr^-1< < 2."0 yr^-1at High Galactic Latitudes

New High Proper Motion Stars from the Digitized Sky Survey. II. Northern Stars with 0."5 yr^-1< < 2."0 yr^-1at High Galactic Latitudes