NGC 4178 is the New General Catalogue identifier for a barred spiral galaxy in the equatorial constellation of Virgo. It was discovered April 11, 1825 by English astronomer John Herschel. [7]

NGC 4178星系最大的特点为星系中央没有难看的巨大隆起，这个特征与黑洞的质量存在较大关系，而且该星系孤零零地处于一片漆黑的宇宙空间中。 距离NGC 4178星系最近的几个星系群，它们则显得更加活跃而聚集在一起，通过不断地碰撞、合并最终演化成一个较大的螺旋星系，这些星系的中央都存在各种质量等级的黑洞，不断发生的碰撞事件使得黑洞也在不断增大，直到达到太阳质量的数十亿倍，该情景最直观的体现为星系中央巨大的隆起，犹如一个令人印象深刻的“膨胀 …

2013年8月24日 · We present {\it Gemini} longslit optical spectroscopy and VLA radio observations of the nuclear region of NGC 4178, a late-type bulgeless disk galaxy recently confirmed to host an AGN through infrared and X-ray observations.

2012年11月5日 · 星系NGC 4178核心的超大質量黑洞，是迄今已知同類天體中質量最低者之一。 由於NGC 4178是天文學家並未預期到會擁有超大質量黑洞的星系型態，因此在這個星系中發現質量偏低的袖珍型超大質量黑洞，顯示它和其他星系中的超大質量黑洞可能來源不同。

2012年5月1日 · Using high resolution Chandra data, we report the presence of a weak X-ray point source coincident with the nucleus of NGC 4178, a late-type bulgeless disk galaxy known to have high ionization mid-infrared (mid-IR) lines typically associated with active galactic nuclei (AGNs).

NGC 4178 is a rather odd barred spiral in northern Virgo some 33 to 55 million light-years distant. Redshift puts it at 33 million light-years but the mean of Tully Fisher measurements puts it at …

NGC 4178 is a spiral galaxy located about 55 million light years from Earth. It does not contain a bright central concentration, or bulge, of stars in its center. Besides NGC 4178, four other galaxies without bulges are currently thought to contain supermassive black holes.

A collection of images taken by the Chandra X-ray Observatory, including image descriptions, constellations, an X-ray sky map and comparisons with images in other wavelengths such as optical, radio and infrared.

NGC 4178 is a Spiral Galaxy in the Virgo constellation. NGC 4178 is situated close to the celestial equator and, as such, it is at least partly visible from both hemispheres in certain times of the year. Given its B magnitude of 12.9, NGC 4178 is visible with the help of a telescope having an aperture of 10 inches (250mm) or more.

2022年11月30日 · We present new follow-up NuSTAR observations of the optically-elusive AGNs in two bulgeless galaxies, NGC 4178 and J0851+3926. NGC 4178 was originally reported as hosting an AGN based on the detection of [Ne V] mid-infrared emission detected by Spitzer, and based on Chandra X-ray imaging it has since been argued to host either a heavily ...