NGC 4041
{{short description|Spiral galaxy in the constellation Ursa Major}}
{{Sky|12|02|12.173|+|62|08|14.23}}
{{Infobox galaxy
| name = NGC 4041
| image = NGC 4041 hst 09042 R814G606B450.png
| caption = NGC 4041 imaged by the Hubble Space Telescope
| epoch = J2000
| pronounce =
| constellation name = Ursa Major
| gal_v =
| dist_ly = {{convert|21.57|Mpc|Mly|abbr=on|lk=on|order=flip}}
| mass =
| mass_light_ratio =
| size = ~{{convert|25.41|kpc|ly|abbr=on|lk=on|order=flip}} (estimated){{cite web
| website = NASA/IPAC Extragalactic Database
| publisher = NASA and Caltech
| title=Results for object NGC 4041
| url = https://ned.ipac.caltech.edu/byname?objname=NGC+4041
| access-date = 12 February 2025}}
| stars =
| appmag_v =
| appmag_b =
| absmag_v =
| size_v = {{nowrap|1.697′ × 1.391′}}
| notes =
| names = {{odlist | 2MASX= J12021217+6208142 | IRAS= 11596+6224 | LEDA= 37999 | UGC= 7014 | CGCG= 292-061 | MCG= +10-17-129}}
| references =
}}
NGC 4041 is the New General Catalogue identifier for a spiral galaxy in the northern circumpolar constellation of Ursa Major. It is located an estimated 70 million light years from the Sun. It was discovered by the German-British astronomer William Herschel on 19 March 1790.{{cite web | url = https://cseligman.com/text/atlas/ngc40.htm#4041 | title = New General Catalogue Objects: NGC{{nbsp}}4041 | last = Seligman | first = Courtney | website = Celestial Atlas | access-date = 12 February 2025 }}
The morphological classification of SA(rs)bc indicates this is a spiral galaxy the lacks a bar; the 'rs' means it has a weakly-formed ring structure, and the 'bc' indicates the spiral arms are moderately to loosely wound.
The galaxy is inclined by around 20° to the line of sight from the Earth. It is forming new stars at the estimated rate of {{nowrap|4.10 {{Solar mass|link=y}} yr−1}}, which is fairly typical for a galaxy of this morphology. The star formation rate is much higher in the central region, which may be the result of recent merger with a dwarf galaxy within the last 100 million years.
This galaxy has no detected activity in the nuclear region. There is a rotating nuclear disk of high brightness at the core that is consistent with the presence of a compact mass of {{val|1e7|0.6|0.7}} {{Solar mass|link=y}}. Most likely this is a supermassive black hole (SMBH).
NGC 4041 is a member of the LGG 266 galaxy group, (Also known as the NGC 4036 Group),{{Cite book |last=Tully |first=R. Brent |title=Nearby galaxies catalog |date=1988 |publisher=Cambridge University Press |isbn=978-0-521-35299-4 |edition=1. publ |location=Cambridge}}{{Cite journal |last1=Kourkchi |first1=Ehsan |last2=Tully |first2=R. Brent |date=2017-07-01 |title=Galaxy Groups Within 3500 km s −1 |journal=The Astrophysical Journal |volume=843 |issue=1 |pages=16 |doi=10.3847/1538-4357/aa76db |doi-access=free |issn=0004-637X|arxiv=1705.08068 }} along with NGC 4036, IC 758, UGC 7009, and UGC 7019. It is located just 17 arc minutes from NGC 4036, and the two form a pair with a projected separation of around {{convert|143|kpc|kly|abbr=on|order=flip}}. The NGC 4036 Group is part of the Ursa Major Cloud, which is part of the Virgo Supercluster.
Supernova
On July 29, 1994, the type IIp supernova designated SN 1994W was discovered in this galaxy by Giancarlo Cortini and Mirko Villi. The event reached peak visual magnitude on August 13, and declined thereafter. It was located about 19 arc seconds to the northwest of the nucleus. This supernova was unusual for the exceptionally low quantity of nickel-56 released—indeed, it was the lowest inferred amount measured for any type II supernova as of that date. Based upon a possible detection of X-ray emission from the remnant, this may be a high-luminosity type IIn supernova.
See also
References
{{reflist|refs=
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| title=The Snapshot Hubble U-band Cluster Survey (SHUCS). I. Survey Description and First Application to the Mixed Star Cluster Population of NGC 4041
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| title=Is There Really a Black Hole at the Center of NGC 4041? Constraints from Gas Kinematics
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| last1=Schlegel | first1=Eric M.
| title=X-Ray Detection of SN 1994W in NGC 4041?
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| pages=11–13 | date=November 2004 | location=Cambridge, UK
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| last=De Vaucouleurs | first=G. | author-link=Gérard de Vaucouleurs
| title=Classification and Morphology of External Galaxies
| journal=Handbuch der Physik
| series=Handbuch der Physik / Encyclopedia of Physics | volume=53 |pages=275–310 | date=1959
| doi=10.1007/978-3-642-45932-0_7 | bibcode = 1959HDP....53..275D
| isbn=978-3-642-45934-4 | postscript=.
}}
| title=NGC 4041
| access-date=2015-11-17
}}
}}
External links
- {{commons category-inline}}
{{NGC objects:4000-4499|state=collapsed}}
{{Ursa Major}}
{{Catalogs|NGC=4041}}
Category:Unbarred spiral galaxies