2020RNAAS...4..192M

Query : 2020RNAAS...4..192M

2020RNAAS...4..192M - Research Notes of the AAS, 4, 192 (2020/November-0)

Evidence That HR 6990 Is a Spectroscopic Binary Hosting a Chemically Peculiar Late B-type star.

MONIER R.

Abstract (from CDS):

The archival IUE spectra of the late B giant HR 6990 are used to show that the absorption lines undergo large radial velocity variations in 2 spectra taken 4 months and 10 days apart. These large RV variations confirm that HR 6990 is a spectroscopic binary. The detection of strong lines of P II, Ga II, Ga III and Hg II show that the brightest member of the system, HR 6990 A, is not a normal late B-type giant but a newly discovered Chemically Peculiar star, probably a phosphorus and gallium enriched main sequence star. The two high resolution IUE spectra do not allow us to elucidate the nature of the companion, HR 6990 B.

Journal keyword(s): Chemically peculiar stars - Spectroscopic binary stars

Simbad objects: 1

Full paper

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	HD 171961	*	18 38 30.7143272304	-23 30 17.622731304		5.753	5.772			B8III	48	0

Query : 2020RNAAS...4..192M

Basic data :

HD 171961 -- Star

* (HD,CD,...), UV (TD1,[SC96]), NIR (2MASS)

18 38 30.7143272304 -23 30 17.622731304 (Optical) [ 0.0607 0.0541 90 ] A 2020yCat.1350....0G

18 35 28.2272788707 -23 32 57.663436280 [ 0.0607 0.0541 90 ]

010.4702736652712 -07.8079215209752 [ 0.0607 0.0541 90 ]

-2.485 -20.588 [0.081 0.056 90] A 2020yCat.1350....0G

V(km/s) -33.00 [4.3] / z(~) -0.000110 [0.000014] / cz -33.00 [4.30] C 2006AstL...32..759G

4.5347 [0.0683] A 2020yCat.1350....0G

B8III C 1988MSS...C04....0H

B 5.753 [0.014] D 2000A&A...355L..27H

V 5.772 [0.010] D 2000A&A...355L..27H

G 5.751487 [0.002864] C 2022yCat.1355....0G

J 5.736 [0.021] C 2003yCat.2246....0C

H 5.759 [0.027] C 2003yCat.2246....0C

K 5.754 [0.023] C 2003yCat.2246....0C

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`HD 171961`	`HIC 91405`	`SKY# 34170`	`WEB 15709`
`CD-23 14572`	`HIP 91405`	`TD1 22837`	`YZ 113 12938`
`CPD-23 7169`	`HR 6990`	`TIC 1286643`	`[B10] 4718`
`GC 25475`	`2MASS J18383070-2330175`	`TYC 6858-1156-1`	`[SC95] M 709`
`GCRV 68415`	`PPM 268694`	`UBV 15828`	`[SC96] Mis 1468`
`GEN# +1.00171961`	`RAVE J183830.7-233018`	`UBV M 23098`	`Gaia DR2 4077625187657388800`
`GSC 06858-01156`	`SAO 187080`	`uvby98 100171961`	`Gaia DR3 4077625187657388800`

References (48 between 1850 and 2026) (Total 48)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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`HD 171961`	`CD-23 14572`	`CPD-23 7169`	`GSC 06858-01156`	`HIC 91405`
`HIP 91405`	`HR 6990`	`2MASS J18383070-2330175`	`PPM 268694`	`RAVE J183830.7-233018`
`SAO 187080`	`TD1 22837`	`TYC 6858-1156-1`	`uvby98 100171961`	`Gaia DR2 4077625187657388800`
`Gaia DR3 4077625187657388800`

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