2022MNRAS.515L..56E

Query : 2022MNRAS.515L..56E

2022MNRAS.515L..56E - Mon. Not. R. Astron. Soc., 515, L56-L60 (2022/September-1)

The relic galaxy NGC 1277 rules out intermediate-age stellar populations origin of CO-strong absorptions in massive early-type galaxies.

EFTEKHARI E., LA BARBERA F., VAZDEKIS A. and BEASLEY M.

Abstract (from CDS):

Massive early-type galaxies (ETGs) show several strong CO absorption features in their H- and K-band spectra that cannot be explained by state-of-the-art stellar population models. For many years, the disagreement has been attributed to the presence of intermediate-age stellar components that are dominated by stars in the asymptotic giant branch phase. However, no robust evidence of this scenario has been provided so far. One way to test this claim is by comparison of CO indices for ETGs and for relic galaxies. Lacking the intermediate-age stellar populations, relic galaxies provide us with a unique opportunity to address the origin of strong CO absorptions in ETGs. Here, we utilize the prototype relic galaxy NGC 1277 and compare the CO absorption features of this galaxy with the ones of a representative sample of massive ETGs. We show that the CO lines in both systems have similar strengths, significantly stronger than the predictions of stellar population synthesis models. We conclude that intermediate-age stellar populations in massive ETGs are not the culprit of the strong CO absorptions.

Abstract Copyright: © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): galaxies: stellar content - infrared: galaxies

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 NGC 1277 GiG 03 19 51.4854427512 +41 34 24.934439244   14.9       ~ 235 0

Query : 2022MNRAS.515L..56E

Basic data :
NGC 1277 -- Galaxy towards a Group of Galaxies
Other object types: otypes_help 		G (2015ApJS,LEDA,...), GiC ([BM99],[CR71]), GiG (2007ApJ,[CHM2007]), rG ([MO2001b]), AG? (2020MNRAS), BH? (2013MNRAS), Opt (SDSS)
ICRS coord. (ep=J2000) : 		03 19 51.4854427512 +41 34 24.934439244 (Optical) [ 0.4892 0.4334 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		03 16 32.7845945171 +41 23 34.976092361 [ 0.4892 0.4334 90 ]
Gal coord. (ep=J2000) : 		150.5496402389823 -13.2038625374643 [ 0.4892 0.4334 90 ]
Proper motions mas/yr : 		0.602 -2.792 [0.688 0.606 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 4997 [~] / z(spectroscopic) 0.01681 [~] / cz 5039.5 [~]
   (Opt) D 2018AJ....156..224J
Parallaxes (mas): 		2.493 [0.6522] A 2020yCat.1350....0G
Morphological type: 		S0a C 2020A&A...640A..30M
Angular size (arcmin): 		0.680 0.381 100 (NIR) C 2006AJ....131.1163S
Fluxes (10) :
B 14.9 [~] E ~
G 17.910990 [0.013634] C 2020yCat.1350....0G
J 10.931 [0.022] C 2006AJ....131.1163S
H 10.170 [0.024] C 2006AJ....131.1163S
K 9.813 [0.029] C 2006AJ....131.1163S
u (AB) 17.789 [0.014] D 2009ApJS..182..543A
g (AB) 15.571 [0.003] C 2009ApJS..182..543A
r (AB) 14.541 [0.002] C 2009ApJS..182..543A
i (AB) 14.065 [0.002] C 2009ApJS..182..543A
z (AB) 13.566 [0.003] C 2009ApJS..182..543A
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 7 : 1800 Display criteria :

Identifiers (16) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

NGC 1277 SDSS J031951.47+413424.8 [BM99] 274 [CR71] 37
LEDA 12434 UZC J031951.6+413425 [CG99] SA426-11 [MO2001b] J031951.6+413423.7
2MASX J03195148+4134242 Z 540-104 [CHM2007] HDC 219 J031951.48+4134242 [MRS2020] J031951.5+413425
MCG+07-07-064 Z 0316.6+4123 [CHM2007] LDC 224 J031951.48+4134242 [MRS2020] 701

References (235 between 1850 and 2026) (Total 235)
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 : 14    Distance : 1    Plx : 1    PM : 1   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : NGC 1277

Link by name to the catalogue in VizieR :

NGC 1277 2MASX J03195148+4134242 SDSS J031951.47+413424.8

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