We present the compilation catalogue of redshift-independent distances included in the HyperLEDA database. It is actively maintained to be up-to-date, and the current version counts 6640 distance measurements for 2335 galaxies compiled from 430 published articles. Each individual series is recalibrated onto a common distance scale based on a carefully selected set of high-quality measurements. This information together with data on HI line-width, central velocity dispersion, magnitudes, diameters, and redshift is used to derive a homogeneous distance estimate and physical properties of galaxies, such as their absolute magnitudes and intrinsic size.
We present the Heraklion Extragalactic Catalogue, or HECATE, an all-sky value-added galaxy catalogue, aiming to facilitate present and future multi-wavelength and multi-messenger studies in the local Universe. It contains 204,733 galaxies up to a redshift of 0.047 (D<200 Mpc), and it is >50% complete in terms of the B-band luminosity density at distances in the 0-170 Mpc range. By incorporating and homogenising data from astronomical databases and multi-wavelength surveys, the catalogue offers positions, sizes, distances, morphological classifications, star-formation rates, stellar masses, met…
We present 850um imaging of the XMM-LSS field observed for 170 hours as part of the James Clerk Maxwell Telescope SCUBA-2 Large eXtragalactic Survey (S2LXS). S2LXS XMM-LSS maps an area of 9 square degrees, reaching a moderate depth of 1-sigma ~ 4 mJy/beam. This is the largest contiguous area of extragalactic sky mapped by JCMT at 850um to date. The wide area of the S2LXS XMM-LSS survey allows us to probe the ultra-bright (S_850um > 15 mJy), yet rare submillimetre population. We present the S2LXS XMM-LSS catalogue, which comprises 40 sources detected at >5-sigma significance, with deboosted flu…
Multiwavelength studies of X-ray selected extragalactic sample
从X射线源的光学鉴别中选出的活动星系核联合目录是作为两个样本的组合而创建的：汉堡ROSAT目录（HRC）和Byurakan-Hamburg-ROSAT目录（BHRC）。两者都是基于使用汉堡类星体巡天（HQS）的低色散光谱对ROSAT目录中的X射线源进行光学识别。然而，HRC和BHRC包含一些错误的鉴定，并使用最近的光学和多波长（MW）目录，我们已经修订了这两个样本排除假活动星系核，并添加新的真正的。从而获得了一个新的4253 X射线选择活动星系核的大的均匀完整样品。其中3352颗被列入类星体和活动星系表，387颗被列入Blazar的罗马多频表。901个候选活动星系核有待进一步研究。我们使用SDSS DR 12光谱对其中的173个天体进行了分类。结果表明：活动星系核61个，HII星系21个，发射线星系12个，吸收线星系71个，恒星2个，未知6个。特别强调窄线Sy1.0-Sy1.5星系和类星体，因为它们中的许多具有软X射线、强FeII线和来自BLR的相对窄的线（"窄宽线"）。结果，真正的活动星系核样本被扩大到3413个天体。我们从最近的星表中检索了MW数据，并对整个活动星系核样本进行了统计研究。试图找到不同类型源的不同波段通量之间的联系，并确定它们的特征，从而确认候选活动星系核。我们分析了这些源的X射线性质，找到了正常星系和活动星系核的X射线之间的界限。
We present a catalogue of 16551 edge-on galaxies created using the public DR2 data of the Pan-STARRS survey. The catalogue covers the three quarters of the sky above Dec.=-30 degrees. The galaxies were selected using a convolutional neural network, trained on a sample of edge-on galaxies identified earlier in the SDSS survey. This approach allows us to dramatically improve the quality of the candidate selection and perform a thorough visual inspection in a reasonable amount of time. The catalogue provides homogeneous information on astrometry, SExtractor photometry, and non-parametric morpholo…
HECATEv2: An all-sky galaxy catalogue for multimessenger astrophysics
University of Crete（克里特大学）；Foundation for Research and Technology-Hellas（希腊研究与技术基金会）；Institute of Space Sciences (ICE, CSIC)（空间科学研究所（ICE, CSIC））；Institut d’Estudis Espacials de Catalunya (IEEC)（加泰罗尼亚太空研究学院（IEEC））；Astronomical Institute, Academy of Sciences（科学院天文研究所）；NASA Goddard Space Flight Center（美国宇航局戈达德太空飞行中心）；Johns Hopkins University（约翰斯·霍普金斯大学）；University of Maryland, Baltimore County（马里兰大学巴尔的摩县分校）
We present GLADE+, an extended version of the GLADE galaxy catalogue introduced in our previous paper for multimessenger searches with advanced gravitational-wave detectors. GLADE+ combines data from six separate but not independent astronomical catalogues: the GWGC, 2MPZ, 2MASS XSC, HyperLEDA, and WISExSCOSPZ galaxy catalogues, and the SDSS-DR16Q quasar catalogue. To allow corrections of CMB-frame redshifts for peculiar motions, we calculated peculiar velocities along with their standard deviations of all galaxies having $B$-band magnitude data within redshift $z=0.05$ using the "Bayesian Ori…
Legacy ExtraGalactic UV Survey with The Hubble Space Telescope. Stellar cluster catalogues and first insights into cluster formation and evolution in NGC 628
我们报告了大量的努力，这是生产全面的高层次的年轻星团（YSC）目录的一个显着的一部分星系观察与遗产银河系外紫外线调查（LEGUS）哈勃国库计划。我们提出的方法来提取集群的位置，验证其真正的性质，产生多波段测光（从NUV到NIR），并通过光谱能量分布拟合分析得出其物理性质。我们使用附近的螺旋星系NGC628作为一个测试案例，展示了LEGUS将对我们理解YSC的形成和演化及其宿主星系内的紧凑恒星协会产生的影响。我们分析了从紫外到近红外的簇光度函数，发现在亮端和所有波长处都有一个陡峭的变化，这表明发光簇的缺乏。NGC 628的质量函数与斜率为$\sim -2$的幂律分布和$10^5$ M $_\odot$的几倍截断一致。在它们形成之后，YSC和紧密协会遵循不同的进化路径。YSC存活时间更长，证实它们是潜在的结合系统。星系团在时间尺度上的消失与恒星形成区的等级组织相当，这表明它们是一个膨胀的系统。我们发现在NGC628的内部区域存在与质量无关的星系团分裂，而在星系的外部，几乎没有或根本没有分裂。我们观察到更快的破坏率低质量（$\leq$ $10^4$ M $_\odot$）集群表明，一个质量依赖的组件是必要的，以充分描述在NGC628的YSC中断过程。
We studied a region of 1.636 square degrees corresponding to the VVV tile $b204$. Using SExtractor, we analysed photometric data generating a catalogue of extended sources in this area. In order to confirm these sources as galaxy candidates we visually inspected RGB images looking for typical galaxy features. Using 2MASX and GCMW catalogued sources we tested completeness and contamination of our catalogue and define suitable colour cuts to select galaxies. We also compared the observational results with those obtained from two semi-analytical models on Dark Matter simulations. One galaxy catal…
International Centre for Radio Astronomy Research, Curtin University（国际射电天文中心，科廷大学）；Australian SKA Regional Centre (AusSRC), Curtin University（澳大利亚SKA区域中心（AusSRC），科廷大学）；CSIRO Space and Astronomy（CSIRO空间与天文学）
The Rapid ASKAP Continuum Survey VII: Spectra and Polarisation In Cutouts of Extragalactic Sources (SPICE-RACS) Second Data Release -- Unveiling the Magnetised Sky
SKA Observatory, SKA-Low Science Operations Centre（SKA 天文台，SKA-Low 科学运营中心）；ATNF, CSIRO Space & Astronomy（CSIRO 空间与天文学部 ATNF）；CSIRO Information Management & Technology（CSIRO 信息管理与技术部）；Departamento de Física de la Tierra y Astrofísica & IPARCOS-UCM, Universidad Complutense de Madrid（马德里康普顿斯大学地球物理与天体物理学系及 IPARCOS-UCM）；Research School of Astronomy & Astrophysics, The Australian National University（澳大利亚国立大学天文学与天体物理学研究学院）；Dunlap Institute for Astronomy and Astrophysics, University of Toronto（多伦多大学邓普勒天文学与天体物理学研究所）
We present the South Galactic Pole (SGP) data release from the GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey. These data combine both years of GLEAM observations at 72-231 MHz conducted with the Murchison Widefield Array (MWA) and cover an area of 5,113 $\mathrm{deg}^2$ centred on the SGP at 20$^\mathrm{h}$40$^\mathrm{m}$ < RA < 05$^\mathrm{h}$04$^\mathrm{m}$ and $-48°$ < Dec < $-2°$. At 216 MHz, the typical rms noise is $\approx 5$ mJy/beam and the angular resolution $\approx 2$ arcmin. The source catalogue contains a total of 108,851 components above $5σ$, of wh…
We describe a new low-frequency wideband radio survey of the southern sky. Observations covering 72 - 231 MHz and Declinations south of $+30^\circ$ have been performed with the Murchison Widefield Array "extended" Phase II configuration over 2018 - 2020 and will be processed to form data products including continuum and polarisation images and mosaics, multi-frequency catalogues, transient search data, and ionospheric measurements. From a pilot field described in this work, we publish an initial data release covering 1,447 sq. deg over 4h < RA < 13h, -32.7deg < Dec < -20.7deg. We process twent…
Wide Area VISTA Extra-galactic Survey (WAVES): Unsupervised star-galaxy separation on the WAVES-Wide photometric input catalogue using UMAP and ${\rm{\scriptsize HDBSCAN}}$
The Five-hundred-meter Aperture Spherical radio Telescope (FAST) has started the Commensal Radio Astronomy FasT Survey (CRAFTS). In this paper, we use the technical parameters of FAST derived from commissioning observations to simulate the completeness function for extragalactic HI survey of CRAFTS, HI galaxies from two kinds of mock catalogues are selected. One is generated by Monte-Carlo simulation based on the interpolated mass-velocity width function of the ALFALFA $100\%$ (a.k.a. $α$ .100) catalogue. The other is constructed by semi-analytical N-body simulation based on the $Λ$CDM model. …
Knowledge about the large-scale distribution of galaxies is far from complete in the Zone of Avoidance, which is mostly due to high interstellar extinction and to source confusion at lower Galactic latitudes. Past near-infrared (NIR) surveys, such as the Two Micron All Sky Survey (2MASS), have shown the power of probing large-scale structure at these latitudes. Our aim is to map the galaxy distribution across the Southern Galactic plane using the VISTA Variables in the Vía Láctea Survey (VVV), which reach 2 to 4 magnitudes deeper than 2MASS. We used SExtractor + PSFEx to identify extended obje…
With the rapid increase of fast radio burst (FRB) detections within the past few years, there is now a catalogue being developed for all-sky extragalactic dispersion measure (DM) observations in addition to the existing collection of all-sky extragalactic Faraday rotation measurements (RMs) of radio galaxies. We present a method of reconstructing all-sky information of the Galactic magnetic field component parallel to the line of sight, $B_{\parallel}$, using simulated observations of the RM and DM along lines of sight to radio galaxies and FRB populations, respectively. This technique is capa…
'Red nuggets' are a rare population of passive compact massive galaxies thought to be the first massive galaxies that formed in the Universe. First found at $z \sim 3$, they are even less abundant at lower redshifts, and it is believed that with time they mostly transformed through mergers into today's giant ellipticals. Those red nuggets which managed to escape this fate can serve as unique laboratories to study the early evolution of massive galaxies. In this paper, we aim to make use of the VIMOS Public Extragalactic Redshift Survey to build the largest up-to-date catalogue of spectroscopic…
Extragalactic planetary nebulae (PNe) offer a way to determine the distance to their host galaxies thanks to the nearly universal shape of the planetary nebulae luminosity function (PNLF). Accurate PNe distance measurements rely on obtaining well-sampled PNLFs and the number of observed PNe scales with the encompassed stellar mass. This means either disposing of wide-field observations or focusing on the bright central regions of galaxies. In this work we take this second approach and conduct a census of the PNe population in the central regions of galaxies in the Fornax cluster, using VLT/MUS…
Electron densities and filling factors of extragalactic HII regions: NGC 2403 and NGC 628
Universidad de Granada（格拉纳达大学）；Instituto Carlos I de Física Teórica y Computacional（卡洛斯一世理论与计算物理研究所）；Facultad de Ciencias（理学院）；Institute for Astronomy（天文学研究所）；Instituto de Astrofísica de Canarias（加那利群岛天体物理研究所）；Universidad de La Laguna（拉帕尔马大学）
X-ray luminosity functions (XLFs) of Active Galactic Nuclei (AGN) trace the growth and evolution of supermassive black hole populations across cosmic time, however, current XLF models are poorly constrained at redshifts of z>6, with a lack of spectroscopic constraints at these high redshifts. In this work we \redit{place limits} on the bright-end of the XLF at z=5.7-6.4 using high-redshift AGN identified within the Extragalactic Serendipitous Swift Survey (ExSeSS) catalogue. Within ExSeSS we find one serendipitously X-ray detected z>6 AGN, ATLAS J025.6821-33.4627, with an X-ray luminosity of $…
The Planck sub-mm surveys detected the brightest strongly gravitationally lensed dusty galaxies in the sky. The combination of their extreme gravitational flux boosting and image stretching offers the unique possibility of measuring in detail, via high-resolution imaging and spectroscopic follow-up, the galaxy structure and kinematics in early evolutionary phases, thus gaining otherwise unaccessible direct information on physical processes in action. The extraction of candidate strongly lensed galaxies (SLGs) from Planck catalogues is hindered by the fact that they are generally detected with …
