2004MNRAS.348.1295B

Query : 2004MNRAS.348.1295B

2004MNRAS.348.1295B - Mon. Not. R. Astron. Soc., 348, 1295-1300 (2004/March-2)

Deconvolution of high-resolution spectra as a signal-to-noise ratio enhancement method.

BARNES J.R.

Abstract (from CDS):

We demonstrate the use of singular value decomposition as a method for deconvolving high-resolution spectra of rapidly rotating stars. A convolution matrix can be built from the observed template spectrum of a slowly rotating star, with the same spectral type as the target. This can then be written in terms of a set of orthogonal basis vectors which can easily be inverted. The deconvolved stellar rotation profile or broadening function is thus similarly represented as a linear combination of basis vectors. By including only the required number of vectors and rejecting higher-order terms which only describe noise, we obtain a broadening function with greatly boosted signal-to-noise ratio as compared with a mean line in the target spectrum. The high signal-to-noise ratios allow localized line distortions due to starspots to be resolved. We describe the technique and demonstrate its application to the data sets of a rapidly rotating K3 and M1 dwarf.

Abstract Copyright: 2004 RAS

Journal keyword(s): line: profiles - methods: observational - techniques: spectroscopic - stars: imaging - stars: spots

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 V* HK Aqr BY* 23 08 19.5510173448 -15 24 35.766079704 13.4 12.282 10.872 9.964 9.019 M0Ve 219 0

Query : 2004MNRAS.348.1295B

Basic data :
V* HK Aqr -- BY Dra Variable
Other object types: otypes_help 		* (BD,BPM,...), X (2015A&A,1AXG,...), UV (2016ApJ,2EUVE,...), Er* (2019ApJ,[GKL99]), PM* (2013MNRAS,PM), V* (ASAS,NSV,...), BY* (2017ARep), Ro* (2020ApJ), NIR (2MASS)
ICRS coord. (ep=J2000) : 		23 08 19.5510173448 -15 24 35.766079704 (Optical) [ 0.0229 0.0177 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		23 05 41.1518514351 -15 40 50.503001459 [ 0.0229 0.0177 90 ]
Gal coord. (ep=J2000) : 		053.7434107434466 -63.3515670396489 [ 0.0229 0.0177 90 ]
Proper motions mas/yr : 		107.028 -18.889 [0.028 0.023 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 4.35 [0.0127] / z(spectroscopic) 0.000015 [0.000000] / cz 4.35 [0.01]
   (Opt) A 2018MNRAS.475.1960F
Parallaxes (mas): 		40.0995 [0.0235] A 2020yCat.1350....0G
Spectral type: 		M0Ve C 2006A&A...460..695T
Fluxes (12) :
U 13.4 [~] C 2010MNRAS.403.1949K
B 12.282 [~] C 2010MNRAS.403.1949K
V 10.872 [0.053] C 2012AcA....62...67K
R 9.964 [~] C 2010MNRAS.403.1949K
G 10.185816 [0.003318] C 2020yCat.1350....0G
I 9.019 [0.019] C 2012AcA....62...67K
J 7.979 [0.021] C 2003yCat.2246....0C
H 7.301 [0.029] C 2003yCat.2246....0C
K 7.114 [0.031] C 2003yCat.2246....0C
g 11.673 [0.05] D 2012yCat.1322....0Z
r 10.285 [0.02] D 2012yCat.1322....0Z
i 9.575 [0.06] D 2012yCat.1322....0Z
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 1 : 61 Display criteria :

Identifiers (33) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

BD-16 6218 GEN# -0.01606218 RAVE J230819.6-152436 V* HK Aqr
ASAS J230819-1524.5 GJ 890 RAVE J230819.5-152435 [GKL99] 439
1AXG J230822-1524 HIC 114252 RBS 1949 [RHG95] 3638
BPM 82623 HIP 114252 1RXS J230820.0-152436 Gaia DR2 2410011256225662208
CNS5 5701 2MASS J23081954-1524354 StKM 2-1698 Gaia DR3 2410011260521088512
2EUVE J2308-15.4 MCC 342 TIC 5656273 Gaia DR1 2410011256225662208
EUVE J2308-15.4 NSV 14434 TYC 6395-658-1
GALEX J230819.5-152435 PLX 5597.31 UBV M 5487
GCRV 73830 PM J23083-1524 UCAC4 373-187792

References (219 between 1850 and 2026) (Total 219)
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 : 5    Diameter : 1    Distance : 5    Var : 6    Rot : 3    Fe/H : 5    Plx : 7    PM : 4    SpT : 6   

   

Observing logs
IUE : 20    XMM : 2   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : V* HK Aqr

Link by name to the catalogue in VizieR :

BD-16 6218 EUVE J2308-15.4 GALEX J230819.5-152435 GJ 890 HIC 114252
HIP 114252 2MASS J23081954-1524354 NSV 14434 RAVE J230819.6-152436 RAVE J230819.5-152435
1RXS J230820.0-152436 TYC 6395-658-1 UCAC4 373-187792 V* HK Aqr [GKL99] 439
Gaia DR2 2410011256225662208 Gaia DR3 2410011260521088512 Gaia DR1 2410011256225662208

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