Japanese version is here
In this seminar we present our recent research and introduce papers on stellar and solar physics, and plasma astrophysics.
|Date||Speaker||Title and Abstract|
「Li problem and flare stars」
I'm going to talk about "Li problem" and detections of Li line in flare stars.
Li I enhancement during a long-duration stellar flare
Montes & Ramsey 1998 A&A letter
In the next Wednesday I would like to introduce the following paper:
"The Truncated Disk from Suzaku Data of GX 339-4 in the Extreme Very High State" (Tamura et al. 2012, ApJ, 753, 65).
"The Truncated Disk from Suzaku Data of GX 339-4 in the Extreme Very High State"
Tamura et al. 2012, ApJ, 753, 65
を紹介する予定です。アウトバースト中の高光度の状態のブラックホール X 線連星に対する最新の解析結果です。
Exploring the α-enhancement of metal-poor planet-hosting stars.
The Keplar + Harps samples
I would like to review the following paper:
"The high-redshift (z>3) AGN population in the 4 Ms Chandra Deep Field South" by Vito et al."
Vito, F., Vignali, C., Gilli, R., et al. 2012, arXiv:1209.4193.
It reports the cosmological evolution of AGNs (space density, obscured fraction) on the basis of the Chandra Deep Field South (CDFS) survey.
Workshop on stellar super flare
I will report our study of radio-loud AGNs with X-ray observations in
the next seminar. This is "mid-term report" for PhD. Sorry for the talk
Title: X-Ray Study of Nuclear Structure of Radio-Loud Active Galactic Nuclei
The title of my talk at the next Wednesday seminar on Nov. 21 is:
On the Evolution of Cataclysmic Variable Stars
I will first review the standard scenario of CVs, and introduce some recent researches challenging this.
In the next seminar (28th Nov.), I would present our recent
achievements and activities on the galaxy chemical evolution.
title: FIR-submm metallicity diagnostcs with fine-structure emission lines
Maiolino, Nagao, Grazian, Cocchia, et al. A&A, 488, 463 (2008) “The evolution of the mass-metallicity relation at z>3”
Nagao, Maiolino, Marconi, and Matsuhara, A&A, 526, A149 (2011) “Metallicity diagnostics with infrared fine-structure lines”
Nagao, Maiolino, De Breuck, Caseli, et al. A&A, 542, L34 (2012) “ALMA reveals a chemically evolved SMG at z=4.76”
In the next seminar (5th Dec.), I would like to introduce the following paper:
"The Small-Scale Environment of Quasars"
Serber et al., 2006, ApJ, 643, 68
In the next seminar (12th Dec.), I would like to talk about the power spectrum
density (PSD) of AGN. PSD analysis is major method to investigate the variability
of AGN. I will introduce a review paper and recent researches.
Gonzalez-Martin & Vaughan, 2012, A&A, 544, 80
"X-ray variability of 104 active galactic nuclei. XMM-Newton power-spectrum density profiles"
McHardy, I., 2010, Lecture Notes in Physics, Berlin Springer Verlag, 794, 203
"X-Ray Variability of AGN and Relationship to Galactic Black Hole Binary Systems"
In the next seminar (19th Dec.), I would like to introduce
the observational study of peculiar SNe Ia. This class is
known to deviate from the width-luminosity relation of
Type Ia SNe.
I first introduce the following paper:
"TYPE Iax SUPERNOVAE: A NEW CLASS OF STELLAR EXPLOSION"
Foley et al., 2012, ArXiv e-prints, 1212.2209v1
Then, I may report the our observational results of another object observed by OISTER.
The title of my tomorrow's talk will be:
Highlights from the torus workshop 2012
I will mainly introduce results on infrared interferometory of AGN tori.
|Jan. 16||Ohshima||明日は、Otulakowska-Hypka et al.の"IX Draconis - a curious ER UMa-type dwarf nova"をベースに、近年のER UMa型矮新星の動向について話す予定です。|
Special Lecture by Dr. Kaneda (Nagoya Univ.)
The title of my talk in this Wednesday will be:
``Gamma-ray emission from galaxies''
The talk will be based on
-Ackermann et al.(2012), ApJ, 755, 164 "GeV Observations of Star-forming Galaxies with the Fermi Large Area Telescope"
-Ackermann et al.(2012), ApJ, 747, 104 "Search for Gamma-ray Emission from X-Ray-selected Seyfert Galaxies with Fermi-LAT"
Also, I will include some general introductions of the cosmic-ray and gamma-ray physics.
The title of my talk this Wednesday will be:
"Probing the evolution of Active Galactic Nuclei using the Iron Kalpha" line
I will first review the recent developments in our understanding of the unification of Active Galactic Nuclei (AGN), and then present you some recent work I have been doing on this subject. My talk will be mostly based on recent X-ray and IR studies of AGN, with a particular attention to the features generated by reflection of the X-ray emission by circumnuclear material, and to their evolution. I will also shortly discuss how much the advent of the new generation X-ray telescope ASTRO-H will improve our understanding of AGN.
Some of the papers I will present you on this fascinating subject are
Shu et al. (2010)
Shu et al. (2011)
Shu et al. (2012)
Burlon et al. (2011)
I would like to reports our work and review the following paper:
"FITTING LINER NUCLEI WITHIN AGN FAMILY: A MATTER OF OBSCURATION ?"
The Astrophysical Journal, Volume 704, Issue 2, pp. 1570-1585 (2009).
This paper reports the studies of the nuclear obscuration in LINERs and the raletion between the LINERs and the other types of AGN.
I will talk about an analysis of time variation of a blazar.
A title of my presentation is
"Time Variability Analysis of Blazars".
My presentation is based on these papers;
"GAMMA-RAY LIGHT CURVES AND VARIABILITY OF BRIGHTFERMI-DETECTED BLAZARS"
Abdo et al. (2010); ApJ 722, 520
"Long-term variability of the low-luminosity active galactic nucleus of M81"
Iyomoto et al. (2001); MNRAS 321, 767, etc.
I prepare a presentation in English, but I will speak in Japanese, sorry.
Guest speakers and the regular members
out of our group are welcome (Please contact the organizer).