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Lyman-alpha emitters are thought to be young, low-mass galaxies with ages of ~10^8 yr. An overdensity of them in one region of the sky (the SSA 22 field) traces out a filamentary structure in the early Universe at a redshift of z = 3.1…

We report the redshift of an unlensed, highly obscured submillimetre galaxy (SMG), HS1700.850.1, the brightest SMG (S850um =19.1 mJy) detected in the JCMT/SCUBA-2 Baryonic Structure Survey, based on the detection of its CO line emission.…

Astrophysics of Galaxies · Physics 2015-09-09 S. C. Chapman , F. Bertoldi , Ian Smail , C. C. Steidel , A. W. Blain , J. E. Geach , M. Gurwell , R. J. Ivison , G. R. Petitpas , N. Reddy

We provide evidence for a correlation between the presence of giant clumps and the occurrence of active galactic nuclei (AGN) in disk galaxies. Giant clumps of 10^8-9 Msun arise from violent gravitational instability in gas-rich galaxies,…

We have carried out a survey searching for H alpha emitting galaxies at z~0.24 using a narrow band filter tuned with the redshifted line. The total sky area covered was 0.19 square degrees within the redshift range 0.228 to 0.255 in a set…

Astrophysics · Physics 2009-11-07 S. Pascual , J. Gallego , A. Aragon-Salamanca , J. Zamorano

Identifying galaxy clustering at high redshift (i.e. z > 1) is essential to our understanding of the current cosmological model. However, at increasing redshift, clusters evolve considerably in star-formation activity and so are less likely…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-18 L. J. M. Davies , M. N. Bremer , E. R. Stanway , K. Husband , M. D. Lehnert , E. J. A. Mannering

We present structural parameters and morphological properties of faint 450-um selected submillimeter galaxies (SMGs) from the JCMT Large Program, STUDIES, in the COSMOS-CANDELS region. Their properties are compared to an 850um selected and…

We predict the abundance of giant gravitational arcs produced by submillimeter galaxies (SMGs) lensed by foreground galaxy clusters, both at radio and submm wavelengths. The galaxy cluster population is modeled in a realistic way with the…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-13 C. Fedeli , A. Berciano Alba

We present a sample of 115 very low optical surface brightness, highly extended, HI-rich galaxies carefully selected from the ALFALFA survey that have similar optical absolute magnitudes, surface brightnesses, and radii to recently…

We present the SINS survey with SINFONI of high redshift galaxies. With 80 objects observed and 63 detected, SINS is the largest survey of spatially resolved gas kinematics, morphologies, and physical properties of star-forming galaxies at…

Recent high-resolution interferometric images of submillimetre galaxies (SMGs) reveal fascinatingly complex morphologies. This raises a number of questions: how does the relative orientation of a galaxy affect its observed submillimetre…

Astrophysics of Galaxies · Physics 2022-08-31 C. C. Lovell , J. E. Geach , R. Davé , D. Narayanan , K. E. K. Coppin , Q. Li , M. Franco , G. C. Privon

This paper presents the result of $H\alpha$ imaging for luminous infrared galaxies (LIRGs) and ultra-luminous infrared galaxies (ULIRGs). \textbf{It is } a \textbf{complete subsample of Great Observatories All-sky LIRG Survery (GOALS) with…

Astrophysics of Galaxies · Physics 2019-10-30 Jun-Jie Jin , Yi-Nan Zhu , Hong Wu , Feng-Jie Lei , Chen Cao , Xian-Min Meng , Zhi-Min Zhou , Man I Lam

Using the 0.9--4.4~$\mu$m imaging data from the James Webb Space Telescope (JWST) Early Release Observation in the SMACS J0723.3-7327 galaxy cluster field, we discuss the properties of three submillimeter galaxies (SMGs) detected by the…

Luminous compact blue galaxies (LCBGs) have enhanced star formation rates and compact morphologies. We combine Sloan Digital Sky Survey data with HI data of 29 LCBGs at redshift z~0 to understand their nature. We find that local LCBGs have…

Astrophysics of Galaxies · Physics 2015-07-15 C. A. Garland , D. J. Pisano , M. -M. Mac Low , K. Kreckel , K. Rabidoux , R. Guzmán

We present infrared K'- (2.1 micron) and L'-band (3.8 micron) high-spatial-resolution (<0.3") imaging observations of 17 nearby (z < 0.17) ultraluminous infrared galaxies (ULIRGs) assisted with the adaptive optics of the Subaru Telescope.…

Astrophysics of Galaxies · Physics 2020-03-25 Masatoshi Imanishi , Taiki Kawamuro , Satoshi Kikuta , Suzuka Nakano , Yuriko Saito

Previous studies measuring the clustering of submillimeter galaxies (SMGs) have based their measurements on single-dish detected sources, finding evidence for strong clustering. However, ALMA has revealed that, due to the coarse angular…

The photometric redshift distributions, spectral types, Sersic indices, and sizes of all resolved galaxies in the Hubble Space Telescope Ultra Deep Field (UDF) are studied in order to understand the environment and nature of star formation…

High-resolution far-infrared (FIR) observation of submillimeter galaxies (SMGs) is an effective approach to study the formation of sub-structures in the early epoch of massive galaxies. We present the 870$\mu$m continuum images resolved…

Astrophysics of Galaxies · Physics 2025-09-26 Ryota Ikeda , Daisuke Iono , Ken-ichi Tadaki , Andrea Silva , the FOSSILS Team

We present the analysis of Halpha3, an Halpha imaging survey of galaxies selected from the HI ALFALFA Survey in the Coma Supercluster. By using the Halpha line as a tracer of the "instantaneous" star formation, complemented with optical…

Using Spitzer Space Telescope IRAC (3.6-8um) and MIPS (24um) imaging, as well as Hubble Space Telescope optical observations, we identify the IRAC counterparts of the luminous power sources residing within the two largest and brightest…

Astrophysics · Physics 2011-02-11 J. E. Geach , Ian Smail , S. C. Chapman , D. M. Alexander , A. W. Blain , J. P. Stott , R. J. Ivison

Understanding how galaxies interact with the circumgalactic medium (CGM) requires determining how galaxies morphological and stellar properties correlate with their CGM properties. We report an analysis of 66 well-imaged galaxies detected…