The GALEX Ultraviolet Atlas of Nearby Galaxies
The GALEX Ultraviolet Atlas of Nearby Galaxies
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DOI：
10.1086/516636
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发表时间：
2006-06
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影响因子：
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通讯作者：
A. Paz;A. Paz;S. Boissier;B. Madore;B. Madore;M. Seibert;Y. Joe;Y. Joe;A. Boselli;T. Wyder-T.
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文献类型：
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作者：
A. Paz;A. Paz;S. Boissier;B. Madore;B. Madore;M. Seibert;Y. Joe;Y. Joe;A. Boselli;T. Wyder-T.
我们目前的图像，综合测光，和表面亮度和颜色配置文件，最近观察到的星系演化探测器（GALEX）卫星在其远紫外（FUV; λeff = 1516 <$）和近紫外（NUV; λeff = 2267 <$）波段共1034个附近的星系。我们的天体目录主要来自GALEX附近星系巡天（NGS），并补充了在这些领域和其他GALEX曝光的类似深度中偶然发现的直径大于1′的星系。这里分析的样本充分描述了星系在本地宇宙中的分布和全部性质（光度，颜色，星星形成率[SFR]）。从获得的表面亮度轮廓，我们已经计算出渐近的大小，颜色和光度，沿着浓度指数C31和C42。我们还根据它们的形状对UV表面亮度分布进行了形态学分类。该数据集已补充了存档的光学，近红外和远红外通量和颜色。我们发现，综合（FUV − K）的颜色提供了强大的区分椭圆和螺旋/不规则星系，也在不同亚型的螺旋星系。具有较亮K波段光度的椭圆星系（即，质量更大）的（NUV-K）颜色更红，但（FUV-NUV）颜色更蓝（一种对强烈紫外线上升敏感的颜色）。在旋涡/不规则星系的情况下，我们的分析表明，（FUV − NUV）颜色（或等效地，紫外光谱的斜率β）和总的红外-紫外比之间存在相对紧密的相关性。（FUV − NUV）颜色和K波段光度之间的相关性（光度较低的物体比光度较高的物体更蓝）可以解释为由于星系光度增加了尘埃含量。本地图册中的图像沿着简介和综合属性可通过专用网页公开获取。
We present images, integrated photometry, and surface-brightness and color profiles for a total of 1034 nearby galaxies recently observed by the Galaxy Evolution Explorer (GALEX) satellite in its far-ultraviolet (FUV; λeff = 1516 Å) and near-ultraviolet (NUV; λeff = 2267 Å) bands. Our catalog of objects is derived primarily from the GALEX Nearby Galaxies Survey (NGS) supplemented by galaxies larger than 1′ in diameter serendipitously found in these fields and in other GALEX exposures of similar of greater depth. The sample analyzed here adequately describes the distribution and full range of properties (luminosity, color, star formation rate [SFR]) of galaxies in the local universe. From the surface brightness profiles obtained we have computed asymptotic magnitudes, colors, and luminosities, along with the concentration indices C31 and C42. We have also morphologically classified the UV surface brightness profiles according to their shape. This data set has been complemented with archival optical, near-infrared, and far-infrared fluxes and colors. We find that the integrated (FUV − K) color provides robust discrimination between elliptical and spiral/irregular galaxies and also among spiral galaxies of different subtypes. Elliptical galaxies with brighter K-band luminosities (i.e., more massive) are redder in (NUV − K) color but bluer in (FUV − NUV) (a color sensitive to the presence of a strong UV upturn) than less massive ellipticals. In the case of the spiral/irregular galaxies our analysis shows the presence of a relatively tight correlation between the (FUV − NUV) color (or, equivalently, the slope of the UV spectrum, β) and the total infrared-to-UV ratio. The correlation found between (FUV − NUV) color and K-band luminosity (with lower luminosity objects being bluer than more luminous ones) can be explained as due to an increase in the dust content with galaxy luminosity. The images in this Atlas along with the profiles and integrated properties are publicly available through a dedicated Web page.