Astro-ph Club
Time : Every Wednesday 10:30 AM
Location: The 2nd floor lounge in Leewonchul Hall
Organizer : Yun-Kyeong Sheen
Previous boards: [astro-ph 2016]
Please add a new article at the first row of the table.
2017
| Date | Title | First author | Speaker | Keywords | arXiv link |
|---|---|---|---|---|---|
| 2017/12/27 | Clumpy galaxies in CANDELS. II. Physical properties of UV-bright clumps at 0.5 < z < 3 | Yicheng Guo | 신윤경 | Rest-frame color, stellar mass, star formation rate, age, and dust extinction by SED fitting | arXiv:1712.01858 |
| 2017/12/13 | Validity of abundances derived from spaxel spectra of the MaNGA survey | L. S. Pilyugin | 신윤경 | Abundance distributions and a contribution of the radiation of the diffuse ionized gas | arXiv:1712.03418 |
| 2017/12/6 | The Role of Stellar Radial Motions in Shaping Galaxy Surface Brightness Profiles | T. Ruiz-Lara | 변우원 | Three types of disk SB profile are regulated by relative strengths between stellar migration and accretion | arXiv:1709.06968 |
| Bars and spirals in tidal interactions with an ensemble of galaxy mass models | Alex R. Pettitt | 신윤경 | Videos of simulations | arXiv:1712.00882 | |
| 2017/11/29 | MUSE observations of the counter-rotating nuclear ring in NGC 7742 | Thomas P. K. Martinsson | 신윤경 | The ring has its origin in a minor merger event, possibly 2-3 Gyr ago | arXiv:1711.08982 |
| MUSE observations of M87: radial gradient for the stellar initial-mass function and the abundance of Sodium | Marc Sarzi | 김석 | A radial variation at the low-mass end of the stellar initial mass function (IMF) in the central regions of M87 | arXiv:1711.08980 | |
| 2017/11/22 | Identifying the progenitors of present-day early-type galaxies in observational surveys: correcting 'progenitor bias' using the Horizon-AGN simulation | G. Martin | 신윤경 | Track how the morphological mix of galaxies their progenitors evolves over time. | arXiv:1711.06694 |
| 2017/11/15 | The mass-metallicity relations for gas and stars in star-forming galaxies: strong outflow vs variable IMF | Jianhui Lian | 신윤경 | the origin of the large difference in gas and stellar metallicity | arXiv:1710.11135 |
| 2017/11/8 | Data analysis recipes: Using Markov Chain Monte Carlo | David W. Hogg | 박대성 | very useful and kind, practical guide for using MCMC methods by David Hogg | arXiv:1710.06068 |
| Snapshots of structure formation of a 'Cosmic Beast': Full-scale observations and simulations of MACS J0717.5+3745 | M. Jauzac | 신윤경 | A massive galaxy cluster (z = 0.54) surrounded by 11 merging substructures. | arXiv:1711.01324 | |
| 2017/10/25 | Hubble Space Telescope Imaging of the Active Dwarf Galaxy RGG 118 | Vivienne F. Baldassare | 박대성 | The nearby dwarf galaxy (RGG 118) hosting an active black hole of $\sim 5 \times 10^{4} M_{\odot}$ is imaged with HST/WFC3 to characterize its host galaxy, which is consequently found to have a pseudobulge using GALFIT modeling. They have shown that its black hole is under-massive with respect to the BH-galaxy scaling relations defined by classical bulge samples, supporting the scenario that BHs in pseudobulge systems grow primarily via secular processes. | arXiv:1709.07884 |
| The infrared-radio correlation of spheroid- and disc-dominated star-forming galaxies to z ~ 1.5 in the COSMOS field | Dániel Cs. Molnár | 신윤경 | Low-redshift calibrations of radio emission as an SFR-tracer may remain valid out to at least z ~ 1 - 1.5 for pure star-forming systems. | arXiv:1710.07655 | |
| 2017/9/20 | LoCuSS: The infall of X-ray groups onto massive clusters | C. P. Haines | 신윤경 | Identify 39 X-ray groups in the infall regions of 23 massive galaxy clusters at z ~ 0.2 | arXiv:1709.04945 |
| The effect of nuclear gas distribution on the mass determination of SMBHs | J. E. Mejia-Restrepo | 변우원 | Line-of-sight inclination of disky nuclear gas distribution may affect to measure the SMBH mass. | arXiv:1709.05345 | |
| Polarization of the changing-look quasar J1011+5442 | D. Hutsemékers | 박대성 | The polarization observation for a recently discovered changing-look (broad-line disappeared over a timescale of a few years) quasar (J1011+5442) produces the linear polarization degree of $p=0.15\pm0.22\%$, which is equivalent to null polarization. This result supports the scenario that the spectral change is due to a variation of accretion rate and is against the variable dust obscuration scenario. | arXiv:1707.05540 | |
| 2017/7/31-9/8 | Summer Break | ||||
| 2017/7/26 | Witnessing galaxy assembly in an extended z ~ 3 structure | Michele Fumagalli | 신윤경 | MUSE observations of a high column-density damped Lya absorber (DLA) at z = 3.25 | arXiv:1707.07003 |
| 2017/7/19 | CALIFA reveals prolate rotation in massive early-type galaxies: A polar galaxy merger origin? | A. Tsatsi | 신윤경 | Prolate rotation of early-type galaxies | arXiv:1707.05130 |
| First results from the IllustrisTNG simulations: the galaxy color bimodality | Nelson+ | 김민진 | Color bimodality can be well reproduced by the next generation Illustris simulation. | arXiv:1707.03395 | |
| Black Holes on FIRE: Stellar Feedback Limits Early Feeding of Galactic Nuclei | Anglés-Alcázar | 김민진 | FIRE simulation shows BH growth in early Universe seems to be heavily suppressed by the stellar feedback. | arXiv:1707.03832 | |
| 2017/1/4 | SDSS-IV MaNGA: a serendipitous observation of a potential gas accretion event | Edmond Cheung | 변우원 | a large, asymmetric Ha complex that extends ~6.3kpc is most consistent with gas accretion through recycled wind material. | arXiv:1609.02155v2 |
| SDSS-IV MaNGA: the global and local stellar mass assembly histories of galaxies | Héctor J. Ibarra-Medel | 신윤경 | the main driver of the global MGHs (mass growth histories) is mass, with more massive galaxies assembling earlier (downsizing) | MNRAS.463.2799 | |
| 2017/1/11 | SDSS-IV MaNGA: properties of galaxies with kinematically decoupled stellar and gaseous components | Yifei Jin | 신윤경 | 66 galaxies with kinematically misaligned gas and stars | MNRAS.463.913 |
| 2017/1/18 | Evidence for HI replenishment in massive galaxies through gas accretion from the cosmic web | Dane Kleiner | 신윤경 | massive galaxies accreting cold gas from the intrafilament medium that can replenish some HI gas | arXiv:1701.03467 |
| Evidences against cuspy dark matter halos in large galaxies | Davi C. Rodrigues, Paulo L. C. de Oliveira, Valerio Marra, Antonino del Popolo | 유재원 | Galaxy rotation curves fitting to compare the Burkert DM profile and the Navarro-Frenk-While (NFW) profile. Only galaxies with stellar mass over $10^{10}M_{\odot}$ match better with NFW profile. | arXiv:1701.02698 | |
| 2017/2/1 | Massive relic galaxies prefer dense environments | Luis Peralta de Arriba | 박대성 | the fraction of present-day massive relic galaxies (i.e., $M_{\star} \gtrsim 10^{10} M_{\odot}$ galaxies with little or no growth from star formation or mergers since $z\sim2$) is higher in cluster environment than massive normal galaxies. they also tend to be closer to centers in galaxy clusters than other massive galaxies. | arXiv:1605.06503 |
| A gravitationally-boosted MUSE survey for emission-line galaxies at z > 5 behind the massive cluster RCS 0224 | Renske Smit | 신윤경 | the detailed internal properties of a highly magnified z = 4.88 galaxy seen through the z = 0.77 cluster | arXiv:1701.08160 | |
| Do galaxy global relationships emerge from local ones? The SDSS IV MaNGA surface mass density-metallicity relation | Jorge K. Barrera-Ballesteros | 변우원 | tight relation, with higher metallicities as the surface density increases. This local relationship can reproduce two properties: mass-metallicity rel' and radial metallicity gradients. | MNRAS.463.2513 | |
| 2017/2/8 | Generative Adversarial Network recover features in astrophysical images of galaxies beyond the deconvolution limit | Kevin Schawinski | 신윤경 | A machine learning system can learn to recover information from poor quality data. Applicable to data from SDSS, LSST, Euclid, HST, and JWST. | arXiv:1702.00403 |
| Growing supermassive black holes in the late stages of galaxy mergers are heavily obscured | C. Ricci | 박대성 | A study on the relation between AGN obscuration and galaxy mergers. By analysing the broad-band X-ray spectra of a sample of 30 U/LIRGs in different merger stages, they showed that the fraction of CT AGNs ($N_{\rm H}>10^{24}$ cm$^{-2}$) in late merger galaxies is higher ($f_{\rm CT}=65$%) than local hard X-ray selected AGNs (mostly isolated galaxies; $f_{\rm CT}=27$%). All AGNs of the sample in late merger galaxies have $N_{\rm H} \geq 10^{23}$ cm$^{-2}$, which implies that obscuring material covers 95% of the X-ray source (richer in gas and dust). | arXiv:1701.04825 | |
| 2017/2/15 | The dependence of the mass-metallicity relation on large scale environment | Po-Feng Wu | 신윤경 | the turnover of the MZ relation depends on the gas-content of galaxies. | arXiv:1702.03323 |
| An intermediate-mass black hole in the centre of the globular cluster 47 Tucanae | Bülent Kızıltan | 박대성 | a first definitive measurement of IMBH mass ($M_{\rm BH} = 2,200^{+1,500}_{-800}M_{\odot}$) in the globular cluster, 47 Tucanae ($M_{\rm GC} = 0.7\times10^{6}M_{\odot}$) using “Pulsar acceleration” distribution data with extensive $N$-body simulations. the IMBH has no detectable electromagnetic counter part, thus is gas-starved (not actively accreting BH). | arXiv:1702.02149 | |
| The link between galaxy and black hole growth in the EAGLE simulation | Stuart McAlpine | 변우원 | concurrent with observational results, caused by selection effect | arXiv:1701.01122 | |
| 2017/3/8 | Galaxies grow their bulges and black holes in diverse ways | Eric F. Bell | 김민진(변우원) | merger-only scenario cannot explain the variations between stellar halo mass and bulge mass | arXiv:1702.06116 |
| The Dragonfly Nearby Galaxies Surveys. III. The luminosity function of the M101 group | Shany Danieli | 변우원(김석) | M101 group also has 'missing satellite' & 'too big to fail' problems | arXiv:1702.04727 | |
| Star formation histories in mergers: The spatially resolved properties of the early-stage merger LIRGs IC 1623 and NGC 6090 | C. Cortijo-Ferrero | 신윤경 | lower central nebular metallicity, and flatter profiles, in agreement with the gas inflow scenario | arXiv:1702.06544 | |
| 2017/03/22 | OMEGAWINGS: the first complete census of post starburst galaxies in clusters in the local universe | A. Paccagnella | 신윤경 | Post starburst galaxies in clusters at 0.04 < z < 0.07. | arXiv:1703.03204 |
| The HI content of isolated ultra-diffuse galaxies:a sign of multiple formation mechanisms? | E. Papastergis | 변우원 | UDGs in the field are gas-poor(quiescent) or gas-rich(star-forming) galaxies | arXiv:1703.05610 | |
| 2017/03/29 | The MASSIVE Survey - VII. The relationship of angular momentum, stellar mass and environment of early-type galaxies | Melanie Veale | 신윤경 | a reflection of the joint connection between environment versus M_K, and between M_K versus rotation | arXiv:1703.08573 |
| A Universe of ultra-diffuse galaxies: Theoretical predictions from the $\Lambda$CDM simulation | Yu Rong | 변우원 | UDGs in the cluster seem genuine dwarf galaxies, but have high-spins of the host halos and formed at late time. | arXiv:1703.06147 | |
| 2017/4/5 | Is ram-pressure stripping an efficient mechanism to remove gas in galaxies? | Vincent Quilis | 변우원 | less massive galaxies : outer region, weak RPS / massive galaxies : inner region, removed gas is subdominant compared with the retained gas | arXiv:1703.09446 |
| VEGAS: A VST Early-type GAlaxy Survey II. Photometric study of giant ellipticals and their stellar halos | Marilena Spavone | 신윤경 | Decomposition of light profiles | arXiv:1703.10835 | |
| 2017/4/12 | AGN with discordant optical and X-ray classification are not a physical family: Diverse origin in two AGN | Ordovás-Pascual | 변우원 | Two type-2 AGN with low X-ray absorption can be explained by nuclear dust extinction and low $M_{SMBH}/M_{host}$ ratio, respectively. | arXiv:1704.01595 |
| Red but not dead: Unveiling the star-forming far-infrared spectral energy distribution of SpARCS brightest cluster galaxy at 0 < z < 1.8 | N. R. Bonaventura | 신윤경 | BCGs retain a pulse of star formation activity while maintaining 'red' optical colors. | arXiv:1704.02721 | |
| 2017/4/19 | Near-Infrared MOSFIRE Spectra of Dusty Star-Forming Galaxies at 0.2<z<4 | C.M. Casey | 박대성 | Spectroscopically confirming 450$\mu$m and 850$\mu$m selected dusty star-forming galaxies (DSFGs) with Keck MOSFIRE. 31 sources out of 114 targets were confirmed. This low rate of confirmation is due to intrinsically high rest-frame optical obscuration (too weak Halpha to be detected) and limited sensitivity to certain $z$ ranges (MOSFIRE H and K bands). Large millimeter survey program is necessary to spectroscopically characterizing the high-$z$ DSFGs. | arXiv:1703.10168 |
| Molecular gas dominated 50 kpc ram pressure stripped tail of the Coma galaxy D100 | Pavel Jachym | 신윤경 | CO observations with IRAM 30m telescope reveal in total ~ 10$^{9}$ M$_{\odot}$ of H$_{2}$ in several regions along the ram pressure stripped gas tail | arXiv:1704.00824 | |
| 2017/4/26 | GAIA reveals a metal-rich in-situ component of the local stellar halo | Ana Bonaca | 변우원 | half of halo sample is metal-rich([Fe/H]>-1) and seems to be formed in-situ rather than accreted. | arXiv:1704.05463 |
| Sumo Puff: tidal debris or disturbed ultra-diffuse galaxy? | Johnny P. Greco | 신윤경 | Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) discovered a diffuse stellar cloud with an angular extent > 30“. | arXiv:1704.06681 | |
| 2017/5/10 | Evolutionary phase of gas-rich galaxies in a galaxy cluster at z=1.46 | Masao Hayashi | 신윤경 | ALMA CO J=2-1 detection of 17 galaxies | arXiv:1705.02567 |
| Tidal tails around the outer halo globular clusters Eridanus and Palomar 15 | G. C. Myeong | 변우원 | Tidal tails of two GCs are likely formed by the dynamical evolution of the cluster itself | arXiv:1704.07690 | |
| 2017/5/17 | Obscured Active Galactic Nuclei triggered in compact star-forming galaxies | Yu-Yen Chang | 박대성 | obscured AGN hosts (182 at $z \le 1.5$ in COSMOS field) are more compact than normal star-forming sources at similar redshift and stellar mass. since their sample has low merger fraction and does not show highly perturbed morphology, they suggest that obscured AGNs are primarily hosted by star-forming galaxies having undergone a process of dynamical contraction (central gas compaction triggered by intense gas inflow introducing violent disc instabilities). high-z discs -(gas contraction)→ blue nuggets -(quenching)→ red nuggets -(size growth by dry mergers)→ low-z spheroids | arXiv:1612.02429 |
| 2017/6/7 | Supermassive black holes in disk-dominated galaxies outgrow their bulges and co-evolve with their host galaxies | B.D. Simmons | 변우원 | major mergers do not play a significant role in controlling the coevolution of galaxies and BH. | arXiv:1705.10793 |
| The Taipan Galaxy Survey: scientific goals and observing strategy | Elisabete da Cunha | 신윤경 | A multi-object spectroscopic survey of the Southern hemisphere for galaxies out to z < 0.4. | arXiv:1706.01246 | |
| 2017/6/14 | Fully stripped? they dynamics of dark and luminous matter in the massive cluster collision MACSJ0553.4-3342 | Ebeling H. | 신윤경 | A binary, post-collision merger of massive clusters at z =0.4270. The cool core of the slightly less massive cluster was fully stripped and captured by the massive one during the collision. | arXiv:1706.03535 |
| 2017/6/21 | Ten Billion Years of Brightest Cluster Galaxy Alignments | Michael J. West | 박대성 | the major axis of the BCG and that of the host cluster are aligned in high-redshift universe already (using HST images of distant 65 galaxy clusters at $0.19 < z < 1.8$). plausible mechanisms for the origin of BCG alignments: 1) anisotropic infall of matter into clusters along preferred directions. 2) primordial alignment. 3) gravitational torques that make it aligned with the local tidal field. | arXiv:1706.03798 |
| Blueberry galaxies: the lowest mass young starbursts | Huan Yang | 신윤경 | Dwarf starburst galaxies with very small size, very strong emission lines, the lowest stellar mass and lowest metallicities. | arXiv:1706.02819 | |
| Quantifying the Origin and Distribution of Intracluster Light in a Fornax-like Cluster | Kathryn A. Harris | 유재원 | In N-body simulation, the infalling subhalos (disc + halo) are tidally stripped or disrupted and form disc ICL and halo ICL. The disc ICL is more concentrated in center of the galaxy cluster and the halo ICL (old stars) dominates at radial distance larger than 200kpc. | arXiv:1706.03713 | |
| Properties of Merger Shocks in Merging Calaxy Clusters | Ji-Hoon Ha | 김효원 | Numerical simulation about galaxy cluster major merger generate shock wave. Studying about merger shock process and properties of shock wave. | arXiv:1706.05509 | |
| 2017/6/28 | A massive, dead disk galaxy in the early Universe | Sune Toft | 신윤경 | We report an analysis of the stellar populations and kinematics of a lensed z=2.1478 compact galaxy, which-surprisingly-turns out to be a fast-spinning, rotationally supported disk galaxy. | arXiv:1706.07030 |
| The sustainable growth of the first black holes | E. Pezzulli | 변우원 | Loss of angular momentum of accreted gas is the most important factor to grow SMBH, while the effect of stellar feedback and disk wind is not. | arXiv:1706.06592 | |
| 2017/7/5 | The most-luminous heavily-obscured quasars have a high merger fraction: morphological study of WISE-selected hot dust-obscured galaxies | Lulu Fan | 박대성 | Using high-resolution HST WFC3 NIR images, they show that Hot DOGs at $z\sim3$ have a high merger fraction ($62\pm14\%$) and transforming (intermediate) morphologies ($\langle n_{\rm sersic}\rangle=2.1$), which are consistent with what has been expected from the merger-driven evolutionary model. | arXiv:1605.00661 |
| Black hole masses of tidal disruption event host galaxies | T. Wevers | 변우원 | The TDE host galaxy sample is dominated by low mass black holes($\sim10^6M_{\odot}$) as expected. | arXiv:1706.08965 | |
| 2017/7/12 | Star formation in low density HI gas around the elliptical galaxy NGC 2865 | F. Urrutia-Viscarra | 신윤경 | Potential precursors of globular clusters. | arXiv:1706.06585 |
| Discovery of a lensed ultrabright submillimeter galaxy at z=2.0439 | A. Díaz-Sánchez | 박대성 | By cross-correlating $ALLWISE$ and $Planck$ catalogs, they found a lensed (lensing amplification factor of 11) ultrabright ($L_{\rm IR} \sim 10^{13}L_{\odot}$; SFR $\sim 500-2000$ $M_{\odot}$/yr) SMG (named to Cosmic Eyebrow) at $z=2.044$. The follow-up optical (rest-frame UV) and archival NIR (rest-frame opt) spectroscopic data revealed that they are consistent with a typical absorption line spectrum of a starburst galaxy and typical H$\alpha$ features of other well known SMGs. | arXiv:1707.02454 |