[Graduados] Hoy 14h Seminario FCAG "A black hole's gotta eat too: accretion on low-luminosity AGN" - Lic. Iván López (Universidad de Bologna)

[Secretaría de Ciencia y Técnica]

A toda la comunidad,

les recordamos que en el día de hoy, lunes 11 de diciembre a las 14h, en 
el Salón Meridiano, se brindará la siguiente charla en el marco de los 
Seminarios de la FCAG*"A black hole's gotta eat too: accretion on 
low-luminosity AGN"*.**La misma estará a cargo del***Lic. Iván López* 
(Universidad de Bologna). **A continuación les dejamos el resumen y los 
datos de conexión para aquellos que no puedan acercarse al Salón Meridiano.*
*

*Resumen: *Spectral Energy Distribution (SED) fitting is a popular 
technique to derive properties of galaxies, such as stellar masses and 
Star Formation Rate (SFR), and from their active nuclei, such as 
bolometric Luminosities produced by the central black hole’s accretion. 
We used the code Cigale on an X-ray-selected sample of active galaxies 
until z<2.5 with data from X-ray to mid-IR and obtained reliable values 
of the accretion luminosity. We compared these properties to understand 
how they affect the host galaxy’s global properties in the co-evolution 
scenario. Now, we are applying a similar methodology with a nearby 
sample of galaxies (<50Mpc, based on the Palomar sample), extending the 
multiwavelength data to far-IR and radio. In this sample, we can focus 
our SED fitting in the inner part of the galaxy, obtaining better 
constraints on their accretion luminosities, torus properties, and 
star-forming regions in the inner parsec. We will present a new module 
for Cigale designed especially for low-luminosity AGN that helps us to 
recover the black hole properties even for radiatively inefficient 
accretion disks (like Advection-dominated accretion flow (ADAF) or 
regular truncated disk). We can understand the Eddington rate 
distribution and Black Hole mass function in the local Universe by 
combining this sample with high-luminosity ones, like BASS. We also 
studied some sources of this sample to understand all the details of AGN 
Feedback in action. For one in particular, we will show Spitzer IRS 
spectral maps that reveal spectacular, extended H2 emission from warm 
(200-300 K) molecular gas in the inner 2.5 kpc of the spiral galaxy M58 
(NGC4579). Gemini NIRI imaging of the H2 1-0 S(1) emission line and 
archival ALMA CO 2-1 and HST multiband imaging show that most of the H2 
emission corresponds to lanes of dusty molecular gas that spiral towards 
the galaxy nucleus, where the PAH emission is consistent with excitation 
by UV radiation from old stars in the galaxy bulge rather than star 
formation. The most plausible scenario is that the inner radio jet is 
shock-heating the kpc-scale molecular disk. Jet-shocked H2 may impact 
star formation and help regulate the masses of the stellar bulges and 
SMBH in otherwise normal spiral galaxies. In the future, JWST will 
observe this galaxy (Cycle 2, PI: Lopez, IE) to resolve spatially and 
kinematically the jet-ISM interactions at a scale of 10 pc and determine 
what fraction of the molecular and ionized gas is heated in place and 
what fraction is an outflow. JWST will also yield the molecular and 
ionized gas outflow rates, which we will compare to the SMBH accretion 
and nuclear star formation rates to determine how important these 
processes are in regulating both.

**

***Datos de conexión:* **

** ** **
**
Unirse a la reunión zoom: https://us02web.zoom.us/j/89642687970
ID de reunión: 896 4268 7970
Código de acceso: 526656

*A fin de reducir el uso de residuos plásticos, les solicitamos que se 
acerquen con sus propias tazas para el café.*
Aunque este seminario será en formato híbrido, esperamos contar con su 
presencia.

Saludos,

Secyt-FCAG

-- 
Secretaría de Ciencia y Técnica
Facultad de Ciencias Astronómicas y Geofísicas
Horario de atención: lunes a viernes de 8hs a 15hs
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