The circumnuclear environment of the peculiar galaxy NGC 3310

Abstract

Gas and star velocity dispersions have been derived for eight circumnuclear star-forming regions (CNSFRs) and the nucleus of the spiral galaxy NGC3310 using high resolution spectroscopy in the blue and far red. Stellar velocity dispersions have been obtained from the CaII triplet in the near-IR, using cross-correlation techniques, while gas velocity dispersions have been measured by Gaussian fits to the Hb 4861A and [OIII]5007A emission lines. The CNSFRs stellar velocity dispersions range from 31 to 73 km/s. These values, together with the sizes measured on archival HST images, yield upper limits to the dynamical masses for the individual star clusters between 1.8 and 7.1 x 10${}^6$ M${}_{\odot }$, for the whole CNSFR between 2 x 10${}^7$ and 1.4 x 10${}^8$ M${}_{\odot }$, and 5.3 x 10${}^7$ M${}_{\odot }$ for the nucleus inside the inner 14.2 pc. The masses of the ionizing stellar population responsible for the HII region gaseous emission have been derived from their published Ha luminosities and are found to be between 8.7 x 10${}^5$ and 2.1 x 10${}^6$ M${}_{\odot }$ for the star-forming regions, and 2.1 x 10${}^5$ M${}_{\odot }$ for the galaxy nucleus; they therefore constitute between 1 and 7 per cent of the total dynamical mass. The ionized gas kinematics is complex; two different kinematical components seem to be present as evidenced by different line widths and Doppler shifts.

24 pages, accepted by MNRAS

References in corpus (16)

• Precision abundance analysis of bright HII galaxies
• The temperature and ionization structure of the emitting gas in HII galaxies: Implications for the accuracy of abundance determinations
• Gemini GMOS/IFU spectroscopy of NGC 1569 - I: Mapping the properties of a young star cluster and its environment
• The metal abundance of circumnuclear star forming regions in early type spirals. Spectrophotometric observations
• On the Mass of Dense Star Clusters in Starburst Galaxies from Spectro-Photometry
• Supermassive black holes in the Sbc spiral galaxies NGC 3310, NGC 4303 and NGC 4258
• The effect of binaries on the dynamical mass determination of star clusters
• HST/STIS spectroscopy of the environment in the starburst core of M82
• Young star clusters in interacting galaxies - NGC 1487 and NGC 4038/4039
• Gemini GMOS/IFU spectroscopy of NGC 1569 - II: Mapping the roots of the galactic outflow
• Kinematics of gas and stars in the circumnuclear starforming ring of NGC 3351
• Ages and metallicities of circumnuclear star formation regions from Gemini IFU observations
• The Massive Star Population in the Giant HII Region Tol89 in NGC5398
• Dynamical masses of two young globular clusters in the blue compact galaxy ESO 338-IG04
• Stellar dynamics of blue compact galaxies. II. Further indications of a merger in ESO 338-IG04
• Dynamical mass of a star cluster in M83: a test of fibre-fed multi-object spectroscopy

Cited by in corpus (17)

• Complex gas kinematics in compact, rapidly assembling star-forming galaxies
• Discrepancies between the [OIII] and [SIII] Temperatures in HII Regions
• Chemodynamics of Green Pea galaxies -- I. Outflows and turbulence driving the escape of ionising photons and chemical enrichment
• Optical and mid-infrared neon abundance determinations in star-forming regions
• High resolution spectroscopy of the BCD galaxy Haro 15: II. Chemodynamics
• Ionizing stellar population in the disk of NGC 3310 $-$ I. The impact of a minor merger on galaxy evolution
• Integral Field Spectroscopy of Green Peas (I): Disentangling disk-like, turbulence and strong outflow kinematics in SDSSJ083843.63+385350.5
• Abundance determination of multiple star-forming regions in the HII galaxy SDSS J165712.75+321141.4
• High resolution spectroscopy of the BCD galaxy Haro 15:I. Internal kinematics
• The (black hole mass)-(color) relations for early- and late-type galaxies: red and blue sequences
• Effective temperature of ionizing stars of extragalactic HII regions
• Giant HII Regions in NGC 7479 & NGC 6070
• Implications of the kinematical structure of circumnuclear star-forming regions on their derived properties
• A photometric comprehensive study of circumnuclear star forming rings: the sample
• Sub-arcsecond radio continuum mapping in and around the spiral galaxy NGC3351 using MERLIN
• Physical properties of circumnuclear ionising clusters. II. NGC 7469
• Physical properties of circumnuclear ionising clusters. III. Kinematics of gas and stars in NGC 7742