2003ApJ...599L..45L

Query : 2003ApJ...599L..45L

2003ApJ...599L..45L - Astrophys. J., 599, L45-L48 (2003/December-2)

On titanium carbide nanoparticles as the origin of the 21 micron emission feature in post-asymptotic giant branch stars.

LI A.

Abstract (from CDS):

Titanium carbide (TiC) nanocrystals were recently proposed as the carrier of the mysterious 21 µm emission feature observed in post-asymptotic giant branch stars, based on their close spectral match and the presolar nature of meteoritic TiC nanograins (which reveals their stellar ejecta origin). But we show in this Letter that the Kramers-Kronig dispersion relations, which relate the wavelength-integrated extinction cross section to the total dust mass, would impose a lower bound on the TiC mass. This Kramers-Kronig lower limit exceeds the maximum available TiC mass by a factor of at least ∼50, independent of the absolute value of the (unknown) ultraviolet/visible absorptivity of nano-TiC. The TiC model is therefore readily ruled out by the Kramers-Kronig physical principle.

Abstract Copyright: ∼

Journal keyword(s): Stars: Circumstellar Matter - ISM: Dust, Extinction - Infrared: Stars - Stars: AGB and Post-AGB - Stars: Individual: Henry Draper Number: HD 56126

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 56126 pA* 07 16 10.2590823192 +09 59 47.954735376   9.20 8.32     F0/5Ia 330 0

Query : 2003ApJ...599L..45L

Basic data :
HD 56126 -- Post-AGB Star
Other object types: otypes_help 		* (HD,AG,...), V* (NSV,V*), IR (GLMP,IRAS), pA* (1989ApJ), C* (CGCS), LP* (2009yCat), AB? (1991A&AS), NIR (2MASS), MIR (WISE)
ICRS coord. (ep=J2000) : 		07 16 10.2590823192 +09 59 47.954735376 (Optical) [ 0.0208 0.0188 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		07 13 25.3174065162 +10 05 09.238849134 [ 0.0208 0.0188 90 ]
Gal coord. (ep=J2000) : 		206.7456545858905 +09.9948081019973 [ 0.0208 0.0188 90 ]
Proper motions mas/yr : 		-0.362 -0.352 [0.025 0.020 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 93.71 [3.54] / z(spectroscopic) 0.000313 [0.000012] / cz 93.72 [3.54]
   (Opt) C 2018yCat.1345....0G
Parallaxes (mas): 		0.4538 [0.024] A 2020yCat.1350....0G
Spectral type: 		F0/5Ia C 1989ApJ...346..265H
Fluxes (6) :
B 9.20 [0.02] D 2000A&A...355L..27H
V 8.32 [0.01] D 2000A&A...355L..27H
G 8.096128 [0.003506] C 2020yCat.1350....0G
J 6.868 [0.021] C 2003yCat.2246....0C
H 6.708 [0.036] C 2003yCat.2246....0C
K 6.606 [0.017] C 2003yCat.2246....0C
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Identifiers (25) :
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HD 56126 GSC2 N2232303428 SAO 96709 [LFO93] 0713+10
AG+10 909 GSC 00766-00782 TIC 264413925 Gaia DR2 3156171118495247360
ALS 9296 IRAS 07134+1005 TYC 766-782-1 Gaia DR3 3156171118495247360
BD+10 1470 LS VI +10 15 uvby98 100056126 Gaia DR1 3156171114196772096
CGCS 6212 2MASS J07161025+0959480 V* CY CMi
GEN# +1.00056126 NSV 17401 WISE J071610.26+095948.0
GLMP 174 PPM 152274 YZ 10 2806

References (330 between 1850 and 2026) (Total 330)
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 : 1    Distance : 1    Fe/H : 4    Plx : 3    PM : 3    SpT : 6   

   

Observing logs
Herschel : 8    ISO : 5    IUE : 2   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : HD 56126

Link by name to the catalogue in VizieR :

HD 56126 AG+10 909 ALS 9296 BD+10 1470 CGCS 6212
GLMP 174 GSC 00766-00782 IRAS 07134+1005 LS VI +10 15 2MASS J07161025+0959480
NSV 17401 PPM 152274 SAO 96709 TYC 766-782-1 uvby98 100056126
V* CY CMi WISE J071610.26+095948.0 Gaia DR2 3156171118495247360 Gaia DR3 3156171118495247360 Gaia DR1 3156171114196772096

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