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We present deep BVRI band images and HI line observations of the nearby, low surface brightness galaxy ESO215-G?009 which were obtained with the ANU 2.3-m Telescope and the Australia Telescope Compact Array, respectively. ESO215-G?009 was…

Astrophysics · Physics 2009-11-10 Bradley E. Warren , Helmut Jerjen , Baerbel S. Koribalski

We present a new optical spectroscopic survey of 1777 'star-forming' ('SF') and 366 'non-star-forming' ('non-SF') galaxies at redshifts z < 1 (2143 in total), 22 AGN and 423 stars, observed by instruments such as DEIMOS, VIMOS and GMOS, in…

We have studied the spectral time variations of candidate luminous blue variable stars (cLBV) in two low-metallicity blue compact dwarf galaxies, DDO 68 and PHL 293B. The LBV in DDO 68, located in HII region #3, shows an outburst, with an…

Astrophysics of Galaxies · Physics 2022-04-08 N. G. Guseva , T. X. Thuan , Y. I. Izotov

We present an HI-optical catalog of ~ 30,000 galaxies based on the 100% complete Arecibo Legacy Fast Arecibo L-band Feed Array (ALFALFA) survey combined with data from the Sloan Digital Sky Survey (SDSS). Our goal is to facilitate public…

Dwarf Irregular galaxies (dIrrs) are the smallest stellar systems with extended HI discs. The study of the kinematics of such discs is a powerful tool to estimate the total matter distribution at these very small scales. In this work, we…

Astrophysics of Galaxies · Physics 2017-03-22 Giuliano Iorio , Filippo Fraternali , Carlo Nipoti , Enrico Di Teodoro , Justin I. Read , Giuseppina Battaglia

We present HI observations of the galaxies in the first list of the Karachentsev catalog of previously unknown nearby dwarf galaxies (Karachentseva & Karachentsev 1998). This survey covers all known nearby galaxy groups within the Local…

Astrophysics · Physics 2009-10-31 W. K. Huchtmeier , I. D. Karachentsev , V. E. Karachentseva , M. Ehle

We present an HI and optical study of the gas-rich dwarf irregular galaxy DDO 88. Although DDO 88's global optical and HI parameters are normal for its morphological type, it hosts a large (3 kpc diameter) and unusually complete ring of…

Astrophysics · Physics 2009-11-10 Caroline E. Simpson , Deidre A. Hunter , Patricia M. Knezek

We present optical observations of a sample of 57 spiral galaxies and describe the procedures followed to reduce the data. We have obtained images in the optical B and I broad bands, as well as in H alpha, with moderate spatial resolution…

Astrophysics · Physics 2009-11-10 J. H. Knapen , S. Stedman , D. M. Bramich , S. L. Folkes , T. R. Bradley

(abridged) Strongly star-forming galaxies of subsolar metallicities are typical of the high-redshift universe. Here we therefore provide accurate data for two low-z analogs, the well-known low-metallicity emission-line galaxies Haro 11 and…

Cosmology and Nongalactic Astrophysics · Physics 2018-05-29 N. G. Guseva , Y. I. Izotov , K. J. Fricke , C. Henkel

We analyse a 10,000 star spectroscopic survey, focused on Galactic thick disk stars typically 2-5 kpc from the Sun, carried out using the AAOmega Spectrograph on the AAT. We develop methods for completeness-correction of the survey based on…

Astrophysics of Galaxies · Physics 2015-06-15 Apoorva Jayaraman , Gerard Gilmore , Rosemary F. G. Wyse , John E. Norris , Vasily Belokurov

We have studied a sample of 11 blue, luminous, metal-poor galaxies at redshift 0.744 < z < 0.835 from the DEEP2 redshift survey. They were selected by the presence of the [OIII]4363 auroral line and the [OII]3726,3729 doublet together with…

Astrophysics of Galaxies · Physics 2014-12-15 J. M. Perez-Martinez

We present oxygen abundance measurements for 74 blue compact dwarf (BCD) galaxies in the redshift range in [0.2, 0.5] using the strong-line method. The spectra of these objects are taken using Hectospec on the Multiple Mirror Telescope…

Astrophysics of Galaxies · Physics 2016-03-16 Jianhui Lian , Ning Hu , Guanwen Fang , Chengyun Ye , Xu Kong

We analyze a sample of galaxies with stellar masses greater than $10^{10} M_{\odot}$ and with redshifts in the range $0.025<z<0.05$ for which HI mass measurements are available from the GALEX Arecibo SDSS Survey (GASS) or from the Arecibo…

As part of the WIYN High Image Quality Indiana Irvine (WHIQII) survey, we present 123 spectra of emission-line galaxies, selected on intermediate redshift (.4<z<.8) galaxies with blue colors that appear physically compact. The sample…

Cosmology and Nongalactic Astrophysics · Physics 2010-07-30 Erik J. Tollerud , Elizabeth J. Barton , Liese van Zee , Jeff Cooke

We present a detailed analysis of the neutral hydrogen kinematics of 12 nearby dwarf irregular galaxies observed as part of the Local Volume HI Survey (LVHIS) conducted at the Australia Telescope Compact Array. For each galaxy we measure…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 Emma M. Kirby , Baerbel Koribalski , Helmut Jerjen , Angel Lopez-Sanchez

We present results from a detailed spectrophotometric analysis of the blue compact dwarf galaxy Mrk 35 (Haro 3), based on deep optical (B,V,R,I) and near-IR (J,H,K) imaging, Halpha narrow-band observations and long-slit spectroscopy. The…

In this paper we present new and improved data on 38 cool white dwarfs identified by Oppenheimer et al. 2001 (OHDHS) as candidate dark halo objects. Using the high-res spectra obtained with LRIS, we measure radial velocities for 13 WDs that…

We report a catalog of 509 pairs identified among 10403 nearby galaxies with line-of-sight velocities V_LG < 3500 km/s.We selected binary systems in accordance with two criteria (bounding and temporal), which require the physical pair of…

Astrophysics · Physics 2008-12-18 I. D. Karachentsev , D. I. Makarov

How large disk galaxies have evolved in, and out of, the blue cloud of actively star-forming galaxies as a function of environment and time is an outstanding question. Some of the largest disks become systems like M31, M33 and the Milky Way…

Astrophysics · Physics 2009-11-13 Matthew Bershady , Marc Verheijen , Steven Crawford

HI observations of the nearby blue compact dwarf galaxy IC 10 obtained with the Dominion Radio Astrophysical Observatory synthesis telescope (DRAO), for a total integration of $\sim$1000 hours, are presented. We confirm the NW faint 21 cm…

Astrophysics of Galaxies · Physics 2020-01-08 Brenda Namumba , Claude Carignan , Tyler Foster , Nathan Deg