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We study how star formation is regulated in low-mass field dwarf galaxies ($10^5 \leq M_{\star} \leq 10^6 \, \text{M}_{\odot}$), using cosmological high-resolution ($3 \, \text{pc}$) hydrodynamical simulations. Cosmic reionization quenches…

星系天体物理 · 物理学 2020-08-11 Martin P. Rey , Andrew Pontzen , Oscar Agertz , Matthew D. A. Orkney , Justin I. Read , Joakim Rosdahl

We present galaxy spectroscopic data on a pencil beam of $10.75' \times7.5'$ centered on the X-ray cluster RXJ0054.0-2823 at $z = 0.29$. We study the spectral evolution of galaxies from $z=1$ down to the cluster redshift in a…

宇宙学与河外天体物理 · 物理学 2015-05-20 E. Giraud , Q. -S. Gu , J. Melnick , H. Quintana , F. Selman , I. Toledo , P. Zelaya

Gas-phase metallicity in interacting and merging galaxies offers key insights into their star formation processes and evolutionary histories. This study investigates the spatial evolution of gas-phase metallicity (i.e, oxygen abundance, 12…

星系天体物理 · 物理学 2025-03-05 Hsi-An Pan , Lihwai Lin , Sebastian F. Sanchez , Jorge K. Barrera-Ballesteros , Bau-Ching Hsieh

We study the correlation between galaxy structure and the quenching of star formation using a sample of SDSS central galaxies with stellar masses 9.75< log M_*/M_sun<11.25 and redshifts z<0.075. GALEX UV data are used to cleanly divide the…

宇宙学与河外天体物理 · 物理学 2015-06-17 Jerome J. Fang , S. M. Faber , David C. Koo , Avishai Dekel

We study the gas phase metallicity (O/H) and nitrogen abundance gradients traced by star forming regions in a representative sample of 550 nearby galaxies in the stellar mass range $\rm 10^9-10^{11.5} M_\odot$ with resolved spectroscopic…

We present a multi-wavelength study of the nature of the SDSS galaxies divided into fine classes based on their morphology, colour and spectral features. The SDSS galaxies are classified into early-type and late-type; red and blue; passive,…

宇宙学与河外天体物理 · 物理学 2015-05-14 Joon Hyeop Lee , Myung Gyoon Lee , Changbom Park , Yun-Young Choi

We analyse two-dimensional maps and radial profiles of EW(H$\alpha$), EW(H$\delta_A$), and D$_n$(4000) of low-redshift galaxies using integral field spectroscopy from the MaNGA survey. Out of $\approx1400$ nearly face-on late-type galaxies…

We reexamine the systematic properties of local galaxy populations, using published surveys of star formation, structure, and gas content. After recalibrating star formation measures, we are able to reliably measure specific star formation…

This work studies the environments and star formation relationships of local luminous infrared galaxies (LIRG) in comparison to other types of local and distant (z~1) galaxies. The infrared (IR) galaxies are drawn from the IRAS sample. The…

宇宙学与河外天体物理 · 物理学 2015-05-27 Abiy G. Tekola , Petri Vaisanen , Andreas Berlind

To figure out the effect of stellar mass and local environment on morphological transformation and star formation quenching in galaxies, we use the massive ($M_* \geq 10^{10} M_{\odot}$) galaxies at $0.5 \leq z \leq 2.5$ in five fields of…

星系天体物理 · 物理学 2021-12-22 Shuang Liu , Yizhou Gu , Qirong Yuan , Shiying Lu , Min Bao , Guanwen Fang , Lulu Fan

We investigate the emission-line properties of galaxies with red rest-frame colors using spectra from SDSS DR4. Emission lines are detected in more than half of the red galaxies. We focus on the relationship between two emission lines…

天体物理学 · 物理学 2014-10-13 Renbin Yan , Jeffrey A. Newman , S. M. Faber , Nicholas Konidaris , David Koo , Marc Davis

We measure the rate of environmentally-driven star formation quenching in galaxies at $z\sim 1$, using eleven massive ($M\approx 2\times10^{14}\,\mathrm{M}_\odot$) galaxy clusters spanning a redshift range $1.0<z<1.4$ from the GOGREEN…

We use the SDSS and WISE surveys to investigate the real nature of galaxies defined as LINERs in the BPT diagram. After establishing a mid-infrared colour W2-W3 = 2.5 as the optimal separator between galaxies with and without star…

星系天体物理 · 物理学 2016-08-31 F. R. Herpich , A. Mateus , G. Stasińska , R. Cid Fernandes , N. Vale Asari

The dividing line between galaxies that are quenched by reionization ("relics") and galaxies that survive reionization (i.e. continue forming stars) is commonly discussed in terms of a halo mass threshold. We probe this threshold in a…

星系天体物理 · 物理学 2022-12-21 Thales A. Gutcke , Christoph Pfrommer , Greg L. Bryan , Rüdiger Pakmor , Volker Springel , Thorsten Naab

Using a novel approach, we study the quenching and bursting of galaxies as a function of stellar mass ($M_{*}$), local environment ($\Sigma$), and specific star-formation rate (sSFR) using a large spectroscopic sample of $\sim$ 123,000…

We present the results of the archaeological analysis of the stellar populations of a sample of ~4,000 galaxies observed by the SDSS-IV-MaNGA survey using Pipe3D. Based on this analysis we extract a sample of ~150,000 SFRs and stellar…

We analyze a clean sample of 1,118 late-type, face-on galaxies without AGN contamination from the MaNGA survey. Their photometric structures are quantified via two-component (bulge+disk) decompositions on deep $g$-band images from the DESI…

星系天体物理 · 物理学 2026-03-20 Mengting Shen , Jun Yin , Hassen M. Yesuf , Lei Hao , Jiafeng Lu , Lin Lin , Chong Ge , Junfeng Wang , Shiyin Shen , Yu Rong

Using data from four deep fields (COSMOS, AEGIS, ECDFS, and CDFN), we study the correlation between the position of galaxies in the star formation rate (SFR) versus stellar mass plane and local environment at $z<1.1$. To accurately estimate…

The so-called star-forming main sequence of galaxies is the apparent tight relationship between the star formation rate and stellar mass of a galaxy. Previous studies exclude galaxies which are not strictly 'star forming' from the main…

星系天体物理 · 物理学 2016-02-10 Sarah K. Leslie , Lisa J. Kewley , David B. Sanders , Nicholas Lee

We investigate the origin of rare star-formation in an otherwise red-and-dead population of S0 galaxies using spatially resolved spectroscopy. Our sample consists of $120$ low redshift ($z<0.1$) star-forming S0 (SF-S0) galaxies from the…

星系天体物理 · 物理学 2022-04-06 Himansh Rathore , Kavin Kumar , Preetish K. Mishra , Yogesh Wadadekar , Omkar Bait