NGC 1277 A high-z massive galaxy
in the nearby Universe
Ignacio Martín-Navarro
[email protected]
Ignacio Trujillo, Anna Ferré-Mateu, Alexandre Vazdekis,
Marc Balcells, Patricia Sánchez-Blázquez, Francesco La Barbera
Instituto de Astrofísica
de Canarias
Traces of galaxy formation
www.iac.es/project/traces
Understanding galaxy evolution
Either studing distant galaxies...
Understanding galaxy evolution
… or nearby objects ...
Understanding galaxy evolution
… or relic galaxies
How does a relic galaxy look?
Characteristics of a relic galaxy
Old:
Age > 10 Gyr
Carrasco et al. (2010; Gemini AO)
Characteristics of a relic galaxy
Old:
Age > 10 Gyr
Compact:
Reff < 1.5 kpc
Carrasco et al. (2010; Gemini AO)
Characteristics of a relic galaxy
Old:
Age > 10 Gyr
Compact:
Reff < 1.5 kpc
Massive:
M > 1011 Msun
Carrasco et al. (2010; Gemini AO)
Previous studies
Trujillo et al. (2009) Ferré-Mateu et al. (2012)
Old:
Age ~ 2 Gyr
Compact:
Reff < 1.5 kpc
Massive:
M > 1011 Msun
Previous studies
Trujillo et al. (2009) Ferré-Mateu et al. (2012)
Old:
Age ~ 2 Gyr
Compact:
Reff < 1.5 kpc
Massive:
M > 1011 Msun
Is there any relic galaxy??
NGC 1277: a relic galaxy candidate
HST ACS F625W
M = 1.2 x 1011 Msun
Massive
Reff = 1.2 kpc
Compact
van den Bosch et al. (2012)
NGC 1277: a relic galaxy candidate
The Perseus galaxy cluster
Trujillo et al. (2014)
NGC 1277: a relic galaxy candidate
●
No sign of interactions with other nearby galaxies…
Trujillo et al. (2014)
NGC 1277: a relic galaxy candidate
Stellar mass density profile equivalent to those in high-z massive
galaxies…
●
Trujillo et al. (2014)
NGC 1277: a relic galaxy candidate
NGC 1277: a relic galaxy candidate
Ferreras et al. (2013) ,La Barbera et al. (2013)
Spiniello et al. (2014)
NGC 1277: a relic galaxy candidate
La Barbera et al. (2013)
NGC 1277: a relic galaxy candidate
Martín-Navarro et al. (2014, in prep.)
Martín-Navarro et al. (2014, in prep.)
NGC 1277: a relic galaxy candidate
NGC 1277: a relic galaxy candidate
Old:
Age ~ 14 Gyr
Compact:
Reff ~ 1.2 kpc
Massive:
M ~ 1011 Msun
NGC1277 fullfils all the
characteristics to be considered
a nearby relic galaxy
What can we learn from NGC1277??
IMF-slope vs velocity dispersion
IMF-slope vs velocity dispersion
Velocity dispersion is not causing
the observed IMF variation in ETGs
NGC 1277 vs massive ETGs
Martín-Navarro et al. (2014a, 2014b)
NGC 1277 vs massive ETGs
Martín-Navarro et al. (2014a, 2014b)
S
R
W
LO
R
O
T
OTA
What can we learn from NGC1277?
It opens the study in full detail of the properties of the
early Universe
●
Massive galaxies formed the bulk of their stellar masses
in very short time-scales (~100 Myrs)
●
The IMF gradient of NGC1277 does not follow what is
observed in nearby (slow rotating-) massive galaxies
●
It is not the velocity dispersion what is driving the
observed IMF-slope variation in ETGs
●
1.
What is next?
●
What was the primordial population of globular clusters?
High resolution imaging with HST
●
What is the distribution of dark matter in the primordial galaxies?
Very deep 3D spectroscopy with PMAS/PPAK IFU
High resolution K-band NIRI ALTAIR/LGS AO with GEMINI
plus WHT/GTC spectroscopic data
NGC 1277: A Massive Compact Relic Galaxy in the Nearby Universe
Trujillo et al. (2014) arXiv:1310.6367
Radial variations in the stellar initial mass function of early-type galaxies
Martín-Navarro et al. (2014) arXiv:1404.6533
The pristine stellar initial mass function of massive galaxies
Martín-Navarro et al. (2014) In prep
Stay tuned!
Instituto de Astrofísica
de Canarias
Traces of galaxy formation
www.iac.es/project/traces