Sökning: onr:"swepub:oai:DiVA.org:su-192303" >
Looking for Obscure...
Looking for Obscured Young Star Clusters in NGC 1313
-
Messa, Matteo (författare)
-
Calzetti, Daniela (författare)
-
- Adamo, Angela (författare)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
-
visa fler...
-
Grasha, Kathryn (författare)
-
Johnson, Kelsey E. (författare)
-
Sabbi, Elena (författare)
-
Smith, Linda J. (författare)
-
Bajaj, Varun (författare)
-
Finn, Molly K. (författare)
-
Lin, Zesen (författare)
-
visa färre...
-
(creator_code:org_t)
- 2021-03-11
- 2021
- Engelska.
-
Ingår i: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 909:2
- Relaterad länk:
-
http://arxiv.org/pdf...
-
visa fler...
-
https://urn.kb.se/re...
-
https://doi.org/10.3...
-
visa färre...
Abstract
Ämnesord
Stäng
- Using recently acquired Hubble Space Telescope NIR observations (J, Pa beta, and H bands) of the nearby galaxy NGC 1313, we investigate the timescales required by a young star cluster to emerge from its natal cloud. We search for extincted star clusters, potentially embedded in their natal cloud as either (1) compact sources in regions with high H alpha/Pa beta extinctions or (2) compact H II regions that appear as point-like sources in the Pa beta emission map. The NUV-optical-NIR photometry of the candidate clusters is used to derive their ages, masses, and extinctions via a least-chi(2) spectral energy distribution broad- and narrowband fitting process. The 100 clusters in the final samples have masses in the range log10(M M-circle dot) = 2.5-3.5 and moderate extinctions, E(B - V) less than or similar to 1.0 mag. Focusing on the young clusters (0-6Myr), we derive a weak correlation between extinction and age of the clusters. Almost half of the clusters have low extinctions, E(B - V) < 0.25 mag, already at very young ages (<= 3Myr), suggesting that dust is quickly removed from clusters. A stronger correlation is found between the morphology of the nebular emission (compact, partial or absent, both in H alpha and Pa beta) and cluster age. Relative fractions of clusters associated with a specific nebular morphology are used to estimate the typical timescales for clearing the natal gas cloud, resulting in between 3 and 5Myr, similar to 1Myr older than what was estimated from NUV-optical-based cluster studies. This difference hints at a bias for optical-only-based studies, which James Webb Space Telescope will address in the coming years.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas
- Av författaren/redakt...
-
Messa, Matteo
-
Calzetti, Daniel ...
-
Adamo, Angela
-
Grasha, Kathryn
-
Johnson, Kelsey ...
-
Sabbi, Elena
-
visa fler...
-
Smith, Linda J.
-
Bajaj, Varun
-
Finn, Molly K.
-
Lin, Zesen
-
visa färre...
- Om ämnet
-
- NATURVETENSKAP
-
NATURVETENSKAP
-
och Fysik
- Artiklar i publikationen
-
Astrophysical Jo ...
- Av lärosätet
-
Stockholms universitet