2020ApJS..251...24D

Query : 2020ApJS..251...24D

2020ApJS..251...24D - Astrophys. J., Suppl. Ser., 251, 24-24 (2020/December-0)

Measurements of the hyperfine structure of atomic energy levels in Co II.

DING M. and PICKERING J.C.

Abstract (from CDS):

Analysis of hyperfine structure constants of singly ionized cobalt (Co II) were performed on cobalt spectra measured by Fourier transform spectrometers in the region 3000-63,000 cm–1 (33333 - 1587 Å). Fits to over 700 spectral lines led to measurements of 292 magnetic dipole hyperfine interaction A constants, with values between -32.5 mK and 59.5 mK (1 mK = 0.001 cm–1). Uncertainties of 255 A constants were between ±0.4 mK and ±3.0 mK, the remaining 37 ranged up to ±7 mK. The electric quadrupole hyperfine interaction B constant could be estimated for only one energy level. The number of Co II levels with known A values has now increased tenfold, improving and enabling the wider, more reliable, and accurate application of Co II in astronomical chemical abundance analyses.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Atomic physics - Atomic spectroscopy - Laboratory astrophysics - Experimental techniques - Line intensities - Line positions - Spectroscopy

Simbad objects: 1

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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 84937 Pe* 09 48 56.0992891997 +13 44 39.326709913 8.49 8.68 8.32 7.97 7.70 F8Vm-5 831 0

Query : 2020ApJS..251...24D

Basic data :
HD 84937 -- Chemically Peculiar Star
Other object types: otypes_help 		* (2022AJ,HD,...), PM* (1997KFNT,Ci,...), Pe* (2020AJ), NIR (2MASS), MIR (WISEA)
ICRS coord. (ep=J2000) : 		09 48 56.0992891997 +13 44 39.326709913 (Optical) [ 0.0601 0.0809 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		09 46 12.0552424769 +13 59 17.431042450 [ 0.0601 0.0809 90 ]
Gal coord. (ep=J2000) : 		220.9907077858401 +45.4730651378497 [ 0.0601 0.0809 90 ]
Proper motions mas/yr : 		375.252 -773.968 [0.063 0.079 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -15.047 [0.0006] / z(spectroscopic) -0.000050 [0.000000] / cz -15.05 [0.00]
   (Opt) A 2018A&A...616A...7S
Parallaxes (mas): 		13.4978 [0.0444] A 2020yCat.1350....0G
Spectral type: 		F8Vm-5 C 1989AJ.....98.1049G
Fluxes (9) :
U 8.49 [~] C 2002yCat.2237....0D
B 8.68 [~] C 2002yCat.2237....0D
V 8.32 [~] C 2002yCat.2237....0D
R 7.97 [~] C 2002yCat.2237....0D
G 8.206721 [0.002771] C 2020yCat.1350....0G
I 7.70 [~] C 2002yCat.2237....0D
J 7.359 [0.020] C 2003yCat.2246....0C
H 7.121 [0.021] C 2003yCat.2246....0C
K 7.062 [0.018] C 2003yCat.2246....0C
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 2 : 224 Display criteria :

Identifiers (41) :
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HD 84937 GEN# +1.00084937 NLTT 22662 USNO-B1.0 1037-00173960
AG+13 984 GES J09485645+1344286 PLX 2323 uvby98 100084937
AGKR 8836 G 43-3 PLX 2323.00 WEB 8993
AP J09485609+1344395 GPM 147.232800+13.746138 PM 09462+1359 WISEA J094856.36+134431.1
ASCC 949005 HIC 48152 PPM 126819 YZC 19 3873
BD+14 2151 HIP 48152 Pul -3 600076 YZ 13 3873
Ci 18 1163 LFT 684 SAO 98781 Gaia DR2 615943806835727872
Ci 20 549 LHS 2194 TIC 258674176 Gaia DR3 615943806835727872
GALAH 131216003201003 LSPM J0948+1344 TYC 834-654-1
GC 13512 LTT 12605 UBV 9249
GCRV 6294 2MASS J09485609+1344395 UBV M 15723

References (831 between 1850 and 2026) (Total 831)
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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Collections of Measurements Description of Measurements

Velocities : 22    Distance : 1    Rot : 8    Fe/H : 107    Plx : 4    PM : 13    SpT : 6   

   

Observing logs
IUE : 13   

   

External archives :

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HD 84937 AG+13 984 AP J09485609+1344395 BD+14 2151 GALAH 131216003201003
G 43-3 HIC 48152 HIP 48152 LHS 2194 LSPM J0948+1344
2MASS J09485609+1344395 NLTT 22662 PLX 2323 PPM 126819 SAO 98781
TYC 834-654-1 USNO-B1.0 1037-00173960 uvby98 100084937 WISEA J094856.36+134431.1 YZC 19 3873
Gaia DR2 615943806835727872 Gaia DR3 615943806835727872

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