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Related papers: A New Non-Parametric Approach to Galaxy Morphologi…

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We present a quantitative study of the far-ultraviolet (FUV) and optical morphology in 32 nearby galaxies and estimate the ``morphological k-correction'' expected if these objects were observed unevolved at high redshift. Using the common…

Astrophysics · Physics 2009-11-06 L. E. Kuchinski , Barry F. Madore , Wendy L. Freedman , M. Trewella

We use automated surface photometry and pattern classification techniques to morphologically classify galaxies. The two-dimensional light distribution of a galaxy is reconstructed using Fourier series fits to azimuthal profiles computed in…

Astrophysics · Physics 2009-11-07 S. C. Odewahn , S. H. Cohen , R. A. Windhorst , N. S. Philip

(Abridged) We present a morphological analysis of 17 X-ray selected clusters at z~0.25, imaged uniformly with HST WFPC2. Eight of these clusters have low X-ray luminosities (<10^{44} erg/s), while the remaining nine clusters have…

Astrophysics · Physics 2009-11-07 Michael Balogh , Ian Smail , R. Bower , B. Ziegler , G. Smith , R. Davies , A. Gaztelu , J. -P. Kneib , H. Ebeling

We develop a straightforward and quantitative two-step method for spectroscopically classifying galaxies from the low signal-to-noise (S/N) optical spectra typical of galaxy redshift surveys. First, using \chi^2-fitting of characteristic…

Astrophysics · Physics 2009-10-28 Dennis Zaritsky , Ann I. Zabludoff , Jeffrey A. Willick

We investigate the morphological properties of 494 galaxies selected from the GMASS survey at z>1, primarily in their optical rest frame, using HST images, from the CANDELS survey. We propose that the Hubble sequence of galaxy morphologies…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 M. Talia , A. Cimatti , M. Mignoli , L. Pozzetti , A. Renzini , J. Kurk , C. Halliday

We introduce a new photometric estimator of the HI mass fraction (M_HI/M_*) in local galaxies, which is a linear combination of four parameters: stellar mass, stellar surface mass density, NUV-r colour, and g-i colour gradient. It is…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 Cheng Li , Guinevere Kauffmann , Jian Fu , Jing Wang , Barbara Catinella , Silvia Fabello , David Schiminovich , Wei Zhang

We devise improved photometric parameters for the morphological classification of galaxies using a bright sample from the First Data Release of the Sloan Digital Sky Survey. In addition to using an elliptical aperture concentration index…

We present line-strengths and kinematics from the central regions of 32 galaxies with Hubble types ranging from E to Sbc. Spectral indices, based on the Lick system, are measured in the optical and near infra-red (NIR). The 24 indices…

Astrophysics · Physics 2008-11-26 R. N. Proctor , A. E. Sansom

The presence of Active Galaxy Nuclei (AGN) can affect the morphological classification of galaxies. This work aims to determine how the contribution of AGN affects the most used morphological parameters down to the redshift of z~2 in…

We present a new, detailed analysis of the morphologies and molecular gas fractions for a complete sample of 65 local luminous infrared galaxies (LIRGs) from the Great Observatories All-Sky LIRG Survey (GOALS) using high resolution $I$-band…

We present ultraviolet through far-infrared surface brightness profiles for the 75 galaxies in the Spitzer Infrared Nearby Galaxies Survey (SINGS). The imagery used to measure the profiles includes GALEX UV data, optical images from KPNO,…

We use an approach to estimate galaxy morphologies based on an ellipticity (e) vs. Bulge-to-Total ratio (B/T) plane. We have calibrated this plane by comparing with Dressler's classifications. With the aid of our calibration, we have…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 Christopher Añorve , Omar López-Cruz , Hector Ibarra-Medel , Jonathan León-Tavares

Characterization of the morphology of strongly lensed galaxies is challenging because images of such galaxies are typically highly distorted. Lens modeling and source plane reconstruction is one approach that can provide reasonably…

Astrophysics of Galaxies · Physics 2016-12-14 Michael K. Florian , Nan Li , Michael D. Gladders

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

We present deep and high-resolution HST/NIC2 F160W imaging at 1.6micron of six z~2 star-forming galaxies with existing near-IR integral field spectroscopy from SINFONI at the VLT. The unique combination of rest-frame optical imaging and…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 N. M. Förster Schreiber , A. E. Shapley , D. K. Erb , R. Genzel , C. C. Steidel , N. Bouché , G. Cresci , R. Davies

We have studied the morphologies of luminous infrared galaxies (LIRGs; L_IR(8-1000um)>10^11 Lsun) at 0.3< z<1.4 in the HST Ultradeep Field (UDF) by calculating concentration and asymmetry indices and comparing the results with similar…

Astrophysics · Physics 2010-11-11 Y. Shi , G. H. Rieke , C. Papovich , P. G. Perez-Gonzalez , E. Le Floch

The detection of objects that are multi-oriented is a difficult pattern recognition problem. In this paper, we propose to evaluate the performance of different families of descriptors for the classification of galaxy morphologies. We…

Computer Vision and Pattern Recognition · Computer Science 2019-08-22 Hubert Cecotti

We discuss the state of the assembly of the Hubble Sequence in the mix of bright galaxies at redshift 1.4< z \le 2.5 with a large sample of 1,671 galaxies down to H_{AB}~26, selected from the HST/ACS and WFC3 images of the GOODS--South…

We revisit the color bimodality of galaxies using the extensive EFIGI morphological classification of nearby galaxies. The galaxy SDSS images in the g, r and i bands are decomposed as bulge+disk using SourceXtractor++. The spectral energy…

Astrophysics of Galaxies · Physics 2022-11-02 Louis Quilley , Valérie de Lapparent

Galaxy morphology encodes key information about formation and evolution. Large imaging surveys require automated, reproducible methods beyond visual inspection. Non--parametric indices provide an useful framework, but their performance must…