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NGC 4565

May 20, 2023

NGC 4565 (also known as the Needle Galaxy or Caldwell 38) is an edge-on spiral galaxy about 30 to 50 million light-years away in the constellation Coma Berenices.[2] It lies close to the North Galactic Pole and has a visual magnitude of approximately 10. It is known as the Needle Galaxy for its narrow profile.[4] First recorded in 1785 by William Herschel, it is a prominent example of an edge-on spiral galaxy.[5]

NGC 4565
NGC 4565
Observation data (J2000 epoch)
ConstellationComa Berenices
Right ascension12h 36m 20.8s[1]
Declination+25° 59′ 16″[1]
Redshift0.004103[1]
Helio radial velocity1230 ± 5 km/s[1]
Distance42.7 ± 12 Mly (13.1 ± 3.7 Mpc)[2]
53 ± 4 Mly (16.2 ± 1.3 Mpc)[3]
Apparent magnitude (V)10.42[1]
Characteristics
TypeSA(s)b?[1]
Apparent size (V)15′.90 × 1′.85[1]
Other designations
UGC 7772,[1] PGC 42038,[1] Caldwell 38

Characteristics

NGC 4565 is a giant spiral galaxy more luminous than the Andromeda Galaxy.[6] Much speculation exists in literature as to the nature of the central bulge. In the absence of clear-cut dynamical data on the motions of stars in the bulge, the photometric data alone cannot adjudge among various options put forth. However, its exponential shape suggested that it is a barred spiral galaxy.[7] Studies with the help of the Spitzer Space Telescope not only confirmed the presence of a central bar but also showed a pseudobulge within it as well as an inner ring.[8]

NGC 4565 has at least two satellite galaxies, one of which is interacting with it.[9] It has a population of roughly 240 globular clusters, more than the Milky Way.[6]

NGC 4565 is one of the brightest[10] member galaxies of the Coma I Group.[11][10]

This edge-on galaxy exhibits a slightly warped and extended disk under deep optical surveys- likely due to ongoing interactions with neighboring satellite galaxies or other galaxies in the Coma I group. GALEX images show the slight warp at the edge of the disc more clearly than other surveys.

Using the LOw-Frequency ARray (LOFAR), astronomers of the University of Hamburg discovered a diffuse radio halo around NGC 4565. During the observations, a warp was detected in the radio continuum of NGC 4565 that is reminiscent of a neutral hydrogen line (HI) warp and identifying a slight flaring of the galaxy's radio halo. It is assumed that this flaring is caused by the warp as the vertical intensity profiles are asymmetric, which is in agreement with the warp. According to the study, a minimum age for the warp was estimated at approximately 130 million years. This is the spectral age of the galaxy's cosmic ray electrons, during which they are transported into the warp. This indicates that NGC 4565 may be in the aftermath of a period with more intense star formation.

 
A detailed view of part of the disc of the spiral galaxy NGC 4565 imaged by the Hubble Space Telescope

References

  1. ^ a b c d e f g h i "Results for NGC 4565". NASA/IPAC Extragalactic Database. Retrieved 2006-10-12.
  2. ^ a b "Distance Results for NGC 4565". NASA/IPAC Extragalactic Database. Retrieved 2010-05-02.
  3. ^ Jensen, Joseph B.; Tonry, John L.; Barris, Brian J.; Thompson, Rodger I.; et al. (February 2003). "Measuring Distances and Probing the Unresolved Stellar Populations of Galaxies Using Infrared Surface Brightness Fluctuations". Astrophysical Journal. 583 (2): 712–726. arXiv:astro-ph/0210129. Bibcode:2003ApJ...583..712J. doi:10.1086/345430. S2CID 551714.
  4. ^ "NGC4565 at". apod.nasa.gov.
  5. ^ Spiral Galaxy NGC 4565 at http://www.eso.org/public/images/eso0525a/
  6. ^ a b Globular Cluster Systems in Galaxies Beyond the Local Group
  7. ^ "Intermediate-band surface photometry of the edge-on galaxy NGC 4565". iop.org.
  8. ^ Detection of a Distinct Pseudobulge Hidden Inside the Box-Shaped Bulge of NGC 4565
  9. ^ HALOGAS: H I Observations and Modeling of the Nearby Edge-on Spiral Galaxy NGC 4565
  10. ^ a b "Webb Deep-Sky Society: Galaxy of the Month: NGC4565". www.webbdeepsky.com. Retrieved 2018-05-20.
  11. ^ Gregory, Stephen A.; Thompson, Laird A. (April 1977). "The Coma i Galaxy Cloud". The Astrophysical Journal. 213: 345–350. Bibcode:1977ApJ...213..345G. doi:10.1086/155160. ISSN 0004-637X.

External links

  •   Media related to NGC 4565 at Wikimedia Commons
  • NGC 4565 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
  • National Optical Astronomical Observatory 2009-05-22 at the Wayback Machine – NGC 4565
  • APOD (2010-03-04) – NGC 4565: Galaxy on Edge
  • APOD (2009-04-28) – NGC 4565
  • SEDS – NGC 4565


May 20, 2023
4565, also, known, needle, galaxy, caldwell, edge, spiral, galaxy, about, million, light, years, away, constellation, coma, berenices, lies, close, north, galactic, pole, visual, magnitude, approximately, known, needle, galaxy, narrow, profile, first, recorded. NGC 4565 also known as the Needle Galaxy or Caldwell 38 is an edge on spiral galaxy about 30 to 50 million light years away in the constellation Coma Berenices 2 It lies close to the North Galactic Pole and has a visual magnitude of approximately 10 It is known as the Needle Galaxy for its narrow profile 4 First recorded in 1785 by William Herschel it is a prominent example of an edge on spiral galaxy 5 NGC 4565NGC 4565Observation data J2000 epoch ConstellationComa BerenicesRight ascension12h 36m 20 8s 1 Declination 25 59 16 1 Redshift0 004103 1 Helio radial velocity1230 5 km s 1 Distance42 7 12 Mly 13 1 3 7 Mpc 2 53 4 Mly 16 2 1 3 Mpc 3 Apparent magnitude V 10 42 1 CharacteristicsTypeSA s b 1 Apparent size V 15 90 1 85 1 Other designationsUGC 7772 1 PGC 42038 1 Caldwell 38Characteristics EditNGC 4565 is a giant spiral galaxy more luminous than the Andromeda Galaxy 6 Much speculation exists in literature as to the nature of the central bulge In the absence of clear cut dynamical data on the motions of stars in the bulge the photometric data alone cannot adjudge among various options put forth However its exponential shape suggested that it is a barred spiral galaxy 7 Studies with the help of the Spitzer Space Telescope not only confirmed the presence of a central bar but also showed a pseudobulge within it as well as an inner ring 8 NGC 4565 has at least two satellite galaxies one of which is interacting with it 9 It has a population of roughly 240 globular clusters more than the Milky Way 6 NGC 4565 is one of the brightest 10 member galaxies of the Coma I Group 11 10 This edge on galaxy exhibits a slightly warped and extended disk under deep optical surveys likely due to ongoing interactions with neighboring satellite galaxies or other galaxies in the Coma I group GALEX images show the slight warp at the edge of the disc more clearly than other surveys Using the LOw Frequency ARray LOFAR astronomers of the University of Hamburg discovered a diffuse radio halo around NGC 4565 During the observations a warp was detected in the radio continuum of NGC 4565 that is reminiscent of a neutral hydrogen line HI warp and identifying a slight flaring of the galaxy s radio halo It is assumed that this flaring is caused by the warp as the vertical intensity profiles are asymmetric which is in agreement with the warp According to the study a minimum age for the warp was estimated at approximately 130 million years This is the spectral age of the galaxy s cosmic ray electrons during which they are transported into the warp This indicates that NGC 4565 may be in the aftermath of a period with more intense star formation A detailed view of part of the disc of the spiral galaxy NGC 4565 imaged by the Hubble Space TelescopeReferences Edit a b c d e f g h i Results for NGC 4565 NASA IPAC Extragalactic Database Retrieved 2006 10 12 a b Distance Results for NGC 4565 NASA IPAC Extragalactic Database Retrieved 2010 05 02 Jensen Joseph B Tonry John L Barris Brian J Thompson Rodger I et al February 2003 Measuring Distances and Probing the Unresolved Stellar Populations of Galaxies Using Infrared Surface Brightness Fluctuations Astrophysical Journal 583 2 712 726 arXiv astro ph 0210129 Bibcode 2003ApJ 583 712J doi 10 1086 345430 S2CID 551714 NGC4565 at apod nasa gov Spiral Galaxy NGC 4565 at http www eso org public images eso0525a a b Globular Cluster Systems in Galaxies Beyond the Local Group Intermediate band surface photometry of the edge on galaxy NGC 4565 iop org Detection of a Distinct Pseudobulge Hidden Inside the Box Shaped Bulge of NGC 4565 HALOGAS H I Observations and Modeling of the Nearby Edge on Spiral Galaxy NGC 4565 a b Webb Deep Sky Society Galaxy of the Month NGC4565 www webbdeepsky com Retrieved 2018 05 20 Gregory Stephen A Thompson Laird A April 1977 The Coma i Galaxy Cloud The Astrophysical Journal 213 345 350 Bibcode 1977ApJ 213 345G doi 10 1086 155160 ISSN 0004 637X External links Edit Media related to NGC 4565 at Wikimedia Commons NGC 4565 on WikiSky DSS2 SDSS GALEX IRAS Hydrogen a X Ray Astrophoto Sky Map Articles and images National Optical Astronomical Observatory Archived 2009 05 22 at the Wayback Machine NGC 4565 APOD 2010 03 04 NGC 4565 Galaxy on Edge APOD 2009 04 28 NGC 4565 SEDS NGC 4565 Portals Astronomy Stars Spaceflight Outer space Solar System Retrieved from https en wikipedia org w index php title NGC 4565 amp oldid 1152851174, wikipedia, wiki, book, books, library,

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