NGC 2935

{{Infobox galaxy

| name = NGC 2935

| image = NGC 2935 legacy dr10.jpg

| caption = NGC 2935 imaged by Legacy Surveys

| epoch = J2000

| constellation name = Hydra

| sbrightness = 23.9 mag/arcsec^2

| ra= {{RA|09|36|44.8615}}

| dec= {{DEC|-21|07|41.53}}

| z = 0.007575

| h_radial_v = 2271 ± 3 km/s

| dist_ly = {{convert|27.890 ± 0.736|Mpc|Mly|abbr=on|lk=on|order=flip}}

| type = (R')SAB(s)b

| size=~{{convert|56.79|kpc|ly|abbr=on|lk=on|order=flip}} (estimated)

| appmag_v = 12.1

| size_v = {{Val|3.7|×|2.8|u=arcminute}}

| names = {{odlist | PGC= 27351 | name= ESO 565- G 023 | UGCA= 169 | MCG= -03-25-011 | IRAS= 09344-2054}}

}}

NGC 2935 is a large intermediate spiral galaxy located in the constellation Hydra. Its speed relative to the cosmic microwave background is 2,601 ± 23 km/s, which corresponds to a Hubble distance of 38.4 ± 2.7 Mpc (~125 million ly). It was discovered by German-British astronomer William Herschel on 20 March 1786.{{Cite web | title=Results for object NGC 2935 | url=https://ned.ipac.caltech.edu/byname?objname=NGC+2935 | access-date=2024-06-05 | website=ned.ipac.caltech.edu}}{{cite web | url = https://cseligman.com/text/atlas/ngc29.htm#2935 | title = New General Catalogue Objects: NGC{{nbsp}}2935 | last = Seligman | first = Courtney | website = Celestial Atlas | access-date = 24 November 2024}}

NGC 2935 was used by Gérard de Vaucouleurs as a galaxy of morphological type (R2')SAB(s)b in his galaxy atlas. The luminosity class of NGC 2935 is II and it has a broad HI line. In addition, it is a star-forming burst galaxy.{{Cite web |title=Revised data from NGC and IC catalogue by Wolfgang Steinickle, NGC 2900 to NGC 2999 |url=http://astrovalleyfield.ca/AstronomieCompl/NGC%20et%20autres/WolfgangS/N2900_exc_web.htm |access-date=2024-06-05 |website=astrovalleyfield.ca}}

To date, 29 studies and measurements based on redshift give a distance of 27.890 ± 3.962 Mpc (~91 million ly),{{Cite web |title=New General Catalog Objects: NGC 2900 - 2949 |url=https://cseligman.com/text/atlas/ngc29.htm |access-date=2024-06-05 |website=cseligman.com}} which is outside the Hubble distance values. Note that it is with the average value of independent measurements, when they exist, that the NASA/IPAC database calculates the diameter of a galaxy and that consequently the diameter of NGC 2935 could be approximately 78, 1 kpc (~255,000 ly) if we used the Hubble distance to calculate it.{{Cite web |title=Gérard de Vaucouleurs' Atlas of Galaxies |url=https://cseligman.com/text/devaucouleurs.htm |access-date=2024-06-05 |website=cseligman.com}}

Nuclei disk

Observations from the Hubble Space Telescope have concluded that a star-forming disk is present around the core of NGC 2935. The size of its semi-major axis is estimated at 530 pc (~1730 light years) at the estimated distance of this galaxy.{{cite journal |last1=Comerón |first1=S. |last2=Knapen |first2=J. H. |last3=Beckman |first3=J. E. |last4=Laurikainen |first4=E. |last5=Salo |first5=H. |last6=Martínez-Valpuesta |first6=I. |last7=Buta |first7=R. J. |title=AINUR: Atlas of Images of NUclear Rings |journal=Monthly Notices of the Royal Astronomical Society |date=March 2010 |volume=402 |issue=4 |pages=2462–2490 |doi=10.1111/j.1365-2966.2009.16057.x|doi-access=free |arxiv=0908.0272 |bibcode=2010MNRAS.402.2462C }}

Supernovae

Four supernovae have been discovered in NGC 2935:

SN 1975F (type unknown, mag. 15) was discovered on 11 June 1975, by Yvonne Dunlap and Justus R. Dunlap of the Corralitos Observatory at Northwestern University.{{cite journal | bibcode=1975IAUC.2782....1D| title=Supernovae| last1=Dunlap| first1=J. R.| last2=Dunlap| first2=Y.| journal=International Astronomical Union Circular| date=1975| issue=2782| page=1 | url=http://www.cbat.eps.harvard.edu/iauc/02700/02782.html#item1}}{{cite web | website=Transient Name Server | title=SN{{nbsp}}1975F | url=https://www.wis-tns.org/object/1975F | publisher = IAU | access-date=24 November 2024}}
SN 1996Z (type Ia, mag. 16) was discovered on 16 May 1996 by Wayne Johnson.{{cite journal | bibcode=1996IAUC.6401....1J| title=Supernova 1996Z in NGC 2935| last1=Johnson| first1=W.| last2=Benetti| first2=S.| last3=Turatto| first3=M.| last4=Moehler| first4=S.| last5=Garnavich| first5=P.| last6=Riess| first6=A.| last7=Kirshner| first7=R.| last8=Jansen| first8=R.| last9=Barton| first9=E.| journal=International Astronomical Union Circular| date=1996| issue=6401| page=1}}{{cite web | website=Transient Name Server | title=SN 1996Z | url=https://www.wis-tns.org/object/1996Z |publisher = IAU | access-date=18 August 2024}}
SN 2021mwj (type II, mag. 17.7) was discovered on 21 May 2021 by ATLAS. {{cite web | website=Transient Name Server | title=SN 2021mwj | url=https://www.wis-tns.org/object/2021mwj |publisher = IAU | access-date=18 August 2024}}
SN 2021aczp (type II, mag. 18.9) was discovered on 1 November 2021 by ATLAS.{{cite web | website=Transient Name Server | title=SN 2021aczp | url=https://www.wis-tns.org/object/2021aczp |publisher = IAU | access-date=18 August 2024}}

NGC 2935 Group

NGC 2935 is part of a small group of three galaxies named after it. The other two galaxies in the NGC 2935 group are NGC 2983 and NGC 2986.{{Cite web |title=List of nearby galaxy groups |url=http://atunivers.free.fr/virgo/galaclus.html |access-date=2024-06-06 |website=atunivers.free.fr}}

External links

[https://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC_2935&extend=no&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES NGC 2935] at NASA/IPAC
[http://simbad.u-strasbg.fr/simbad/sim-id?protocol=html&Ident=NGC_2935&bibdisplay=none NGC 2935] at SIMBAD
[http://leda.univ-lyon1.fr/ledacat.cgi?o=NGC_2935 NGC_2935] at LEDA